To see the other types of publications on this topic, follow the link: Inverse codes.
Dissertations / Theses on the topic 'Inverse codes'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 48 dissertations / theses for your research on the topic 'Inverse codes.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Щербак, А. С. "Система передачі даних на базі інверсних кодів". Master's thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/75704.
Full textAbstract:
Кваліфікаційна робота складається з наступних розділів: Вступ. Огляд літератури та постановка завдання. Науково-дослідна частина. Розробка алгоритму функціонування та структурної схеми системи. Розробка
схеми електричної функціональної пристрою. Розробка та розрахунок принципових
електричних схем вузлів та блоків пристрою. Техніко-економічна частина. Висновки.
2
Karaoglu, Bulent. "A comparison of frequency offset estimation methods in Orthogonal Frequency Division Multiplexing (OFDM) systems." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FKaraoglu.pdf.
Full textAbstract:
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, Dec. 2004.<br>Thesis Advisor(s): Roberto Cristi, Murali Tummala. Includes bibliographical references (p. 45-46). Also available online.
3
Gu, Wei. "Robustness against interference in Internet of Things." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10195/document.
Full textAbstract:
L'Internet des objets, plus particulièrement les réseaux de capteurs, a attiré beaucoup d'attention ces dernières années. Sa mise en œuvre soulève de nombreuses difficultés, comme la génération d'interférences d'accès multiple (MAI) à caractère impulsif et la consommation d'énergie relativement forte. Les MAI et le bruit thermique doivent être considérés simultanément car ils perturbent fortement les communications. Nous modélisons les MAI et le bruit thermique respectivement par la distribution stable et gaussienne. Nous étudions tout d’abord l’effet des turbo-codes sur le lien direct en utilisant la norme-p comme métrique de décodage. Cette métrique permet une performance de correction d’erreur proche du décodeur optimal. Ensuite nous nous penchons sur les communications coopératives. A l’aide de l’échantillonnage préférentiel, nous estimons les densités de probabilité de la décision statistique du récepteur optimal en présence des bruits stable et gaussien. Cette approche est coûteuse en calcul. Nous proposons donc d’approximer ces densités de probabilité par la distribution gaussienne inverse normale (NIG). Cette solution de calcul est efficace pour approcher le récepteur optimal. Nous montrons également que le récepteur utilisant la norme-p a des performances robustes, quel que soit le type de bruit dominant. A la fin nous combinons les travaux du codage canal et des communications coopératives pour établir une stratégie de codage canal distribué. Basé sur la qualité du lien direct et le niveau de taux d’erreur binaire envisagé, la stratégie d’économie d’énergie peut être mise en place via le choix d’un schéma de codage canal distribué<br>Internet of Things brought great interests in recent years for its attractive applications and intelligent structure. However, the implementation of sensor networks still presents important challenges such as the generation of Multiple-Access-Interference (MAI) with impulsive nature and the relatively high energy consumption. Both the MAI and the thermal noise should be considered due to their strong impairments each may cause on the communication quality. We employ the stable and Gaussian distributions to model the MAI and the thermal noise respectively. Firstly we study the performance of turbo codes in the direct link and we propose the p-norm as a decoding metric. This metric allows a considerable error correction performance improvement which is close to the optimal decoder. Then we investigate cooperative communications. The probability densities in the decision statistic of the optimal receiver are estimated using importance sampling approach when both the stable and Gaussian noises are present. Such a method is computationally expensive. Hence we develop an approximation approach based on the Normal Inverse Gaussian (NIG) distribution. This solution is efficient for calculation and is proximate to the optimal receiver. In addition we show that the p-norm receiver has robust performance no matter what kind of noise is dominant. At last we combine the channel coding and cooperative communication works to establish a distributed channel coding strategy. Through some simulation assessments, the energy saving strategy can be realized by choosing an appropriate distributed channel coding scheme based on the direct link quality and target bit error rate
4
Onsay, Onder. "Hardware Implementation Of Inverse Transform &." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610976/index.pdf.
Full textAbstract:
Mobile devices such as PDAs and cellular phones became indispensible part of business and entertainment world. There are a number of applications run on these devices and they tend to increase day by day causing devices tend to consume more battery power. H.264/AVC is an emerging video compression standard that is likely to be used widely in multimedia environments. As a mobile application, video compression algorithm of H.264 standard has a complex structure that increase the power demand of realizing hardware. In order to reduce this power demand, power consuming parts of the algorithm like deblocking filter and transform&<br>quantization need to be specifically changed for low power application. A low power deblocking filter and inverse transform/quantization algorithm for H.264/AVC decoder is to be proposed and implemented on FPGA.
5
Medd, Adam Jon. "Enhanced inverse design code and development of design strategies for transonic compressor blading." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2002. http://wwwlib.umi.com/cr/syr/main.
Full text
6
ROMMELAERE, VINCENT. "Trois problèmes inverses en glaciologie." Grenoble 1, 1997. http://www.theses.fr/1997GRE10166.
Full textAbstract:
Les questions que se pose le glaciologue peuvent souvent etre identifiees a des problemes inverses. C'est ce qui est illustre dans ce travail a travers trois exemples : ? reconstruction des temperatures du passe : nous essayons de combiner l'information donnee par la composition isotopique de la glace et le profil de temperature mesure a vostok (antarctique). Cette approche suggere que le profil de temperature ne permet pas de donner de meilleure estimation de la temperature du dernier stade glaciaire a vostok que le thermometre isotopique classique. ? reconstruction de la composition de l'atmosphere du passe : lors de la transformation de la neige en glace, des bulles d'air de composition voisine de celle de l'atmosphere sont emprisonnees dans la porosite de la glace. Differents processus naturels peuvent alterer la composition de la bulle et l'interpretation des mesures n'est pas immediate. Nous proposons ici une methode de deconvolution du signal atmospherique prenant en compte les phenomenes de diffusion et de gravitation dans le neve polaire. Nous appliquons ensuite cette methode a l'interpretation des mesures de methane, cfcs et rapport isotopique du methane dans le neve et la glace. ? recontruction des proprietes rheologiques de la glace a grande echelle : les ice-shelves (plates-formes de glace flottantes) constituent avec les ice-streams (fleuves de glace) les elements dynamiques de la calotte antarctique. Leur rheologie est un parametre important a prendre en compte pour predire l'evolution de la geometrie de la calotte antarctique. Nous montrons comment retrouver ce parametre critique a partir d'un modele d'ecoulement et de mesures de terrain, puis nous fournissons une carte de viscosite apparente du ross ice shelf (antarctique de l'ouest). Les techniques d'inversion utilisees pour traiter ces problemes sont classiques dans de nombreux domaines de la geophysique, mais elles sont mal connues des glaciologues. En les appliquant sous une forme simplifiee, nous nous sommes efforces de montrer ce qu'elles peuvent apporter a la glaciologie et quelles sont leurs limites.
7
Koski, Samuel Robert. "Free Surface Penetration of Inverted Right Circular Cones at Low Froude Number." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/77036.
Full textAbstract:
In this thesis the impact of inverted cones on a liquid surface is studied. It is known that with the right combination of velocity, geometry, and surface treatment, a cavity of air can be formed behind an impacting body and extended for a considerable distance. Other investigators have shown that the time and depth of the cone when this cavity collapses and seals follows a different power law for flat objects such as disks, then it does for slender objects such as cylinders. Intuitively it can be expected that a more slender body will have less drag and that the streamlined shape will not push the fluid out of it's way at impact to the same extent as a more blunt body, therefore forming a smaller cavity behind it. With a smaller initial cavity, the time and depth of it's eventual collapse can be expected to be less than that of a much more blunt object, such as a flat disk.
To study this, a numerical model has been developed to simulate cones with the same base radius but different angles impacting on a liquid surface over a range of velocities, showing how the seal depth, time at cavity seal, and drag forces change. In order to ensure the numerical model is accurate, it is compared with experimental data including high speed video and measurements made of the force with time.
It is expected that the results will fall inside the power law exponents reported by other authors for very blunt objects such as disks on one end of the spectrum, and long slender cylinders on the other. Furthermore, we expect that the drag force exerted on the cones will become lower as the L/D of the cone is increased.<br>Master of Science
8
Jin, Wesley. "Practical, Large-Scale Detection of Obfuscated Malware Code Via Flow Dependency Indexing." Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/389.
Full textAbstract:
Malware analysts often need to search large corpuses of obfuscated binaries for particular sequences of related instructions. The use of simple tactics, such as dead code insertion and register renaming, prevents the use of conventional, big-data search indexes. Current, state of the art malware detectors are unable to handle the size of the dataset due to their iterative approach to comparing files. Furthermore, current work is also frequently designed to act as a detector and not a search tool. I propose a system that exploits the observation that many data/control-flow relationships between instructions are preserved in the presence of obfuscations. The system will extract chains of flow-dependent instructions from a binary’s Program Dependence Graph (PDG). It will then use a representation of each chain as a key for an index that points to lists of functions (and their corresponding files). Analysts will be able to quickly search for instruction sequences by querying the index.
9
Al, Kanale Ahmed. "Investigation of recovery of stellar magnetic field geometries from simulated spectropolarimetric data." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-316290.
Full textAbstract:
Powerful remote sensing techniques can covert time variability of polarization profiles of stellar spectral lines into vector magnetic fields maps of stellar surfaces. These techniques are widely applied to interpret observations but have been tested using only simplistic tests. It would be of interest to test magnetic inversion methods using polarization spectra simulated for realistic and physical models of stellar magnetic fields provided by recent 3D numerical simulations. Doppler Imaging is a method to reconstruct vector magnetic field maps of stellar surfaces from variation of polarization profiles. The work in this thesis presents numerical experiments to evaluate the performance of Magnetic Doppler Imaging (MDI) code INVERS10. The numerical experiments showed that in given high-resolution observations in four Stokes parameters, the code is capable of reconstructing magnetic field vector distributions, over the stellar surface, simultaneously and without any prior assumptions about the magnetic field geometry. Input data consists of polarization measurements in the line profiles and the reconstruction is performed by solving the regularized inverse problem. Right results were obtained by testing different type of models covering simple, complex and unusual complex magnetic field distribution. Whilst using incomplete Stokes parameter datasets containing only Stokes I and V profiles, the INVERS10 code was able to reconstruct a global stellar magnetic fields of only simple models and give accurate and reliable results. Testing the code with different inclination and azimuth angle successfully gave the lowest deviation when same values are used from the true map.
10
Avansini, Rafael da Silva. "Caminhos inversos : do surrealismo à poética teatral de Alfred Jarry." Universidade Estadual de Londrina. Centro de Letras e Ciências Humanas. Programa de Pós-Graduação em Letras, 2011. http://www.bibliotecadigital.uel.br/document/?code=vtls000165224.
Full textAbstract:
Este trabalho procura descrever o movimento surrealista e sua implicação, como poética e resultado de uma visão de mundo cujas origens são anteriores ao movimento de 1924. Procura-se demonstrar o que foi o teatro vinculado ao movimento surrealista e sua cisão, principalmente a partir do rompimento entre Artaud e Breton. Verificamos a repercussão de várias poéticas que surgem no teatro do século XX, em especial o caso de Artaud, para, pelo caminho inverso, passando pela ideia de uma teatralidade simbolista (transição do século XIX para o XX) até o naturalismo (segunda metade do século XIX) e o romantismo no começo do século XIX. Para nós, essas correntes estão vinculadas à visão de mundo que tem no surrealismo seu modo de realização, sendo comum às poéticas modernas, entre outros elementos, sua tendência à ruptura e o imperativo, sempre recorrente, de uma interação, cada vez mais aproximada à fusão da arte e da vida. Terminamos, inversamente, em nosso ponto de partida: a poética teatral e a visão de mundo de Alfred Jarry. Sua primeira peça (Ubu roi) era chamada pelo próprio autor de sátira simbolista, exibindo (e isto continua nas outras peças que se seguem em sua Gesta ubuesca) em fins do século XIX, uma densidade e quantidade de identificações com a poética surrealista que demonstram uma antecipação sem par de tal poética no teatro e, consequentemente, de uma teatralidade inauguradora de possibilidades cada vez maiores.<br>Ce travail vise décrire le mouvement surréaliste et ses implications, soit comme une poétique, soit como résultat d"une vision de monde dont les origines sont antérieures au mouvement de 1924. On vise démontrer ce qui a été le théâtre lié au mouvement surréaliste e sa division, principalement à partir de la rupture entre Artaud et Breton. On vérifie la répercussion de plusieurs poétiques dans le théâtre du XXème siècle et après, en particulier le cas d"Artaud, par, en suivant le chemin inverse, en passant par l"idée d"une théâtralité simboliste (transition du XIXème au XXème siècle) jusqu" au naturalisme (deuxième moitié du XIXème siècle) et le romantisme au début du XIXème siècle. À notre avis, ces courants sont vinculées alors à la vision du monde qui a dans le surréalisme son moyen de réalisation, étant commun dans les poétiques modernes, d"entre autres éléments, sa tendance à la rupture et l"impératif, toujours réquerante, d"une intéraction, de plus en plus aproximée de la fusion de l"art et de la vie. On termine, inversement, dans notre point de départ: la poétique théâtral et la vision de monde d"Alfred Jarry. Sa première pièce (Ubu roi), était appelée par l"auteur de satire simboliste, en montrant (et cela continue dans les pièces suivantes dans sa Geste ubuesque), au fin du XIXème siècle, une densité et plusieurs identifications avec la poétique surréaliste que démontrent une antecipation qui n"a pas paires de tel poétique dans le théâtre et, par consequent, d"une théâtralité précursère des possibilitées chaque fois plus grandes.
11
Bolognini, Ana Paula. "Inversor de tensão utilizando transformador de alta frequência com modulação PWM." Universidade Estadual de Londrina. Centro de Tecnologia e Urbanismo. Programa de Pós-Graduação em Engenharia Elétrica, 2006. http://www.bibliotecadigital.uel.br/document/?code=vtls000178957.
Full textAbstract:
A partir do estudo qualitativo e quantitativo dos conversores CC CC, incluindo o conversor Forward convencional, do método de controle das chaves conhecido como modulação por largura de pulso ou PWM, a importância do tempo morto e do estudo dos conversores CC CA, foi possível apresentar neste trabalho uma análise de uma nova topologia de inversor de tensão, também conhecido como conversor CC CA, formado por quatro conversores Forward modificados ligados em paralelo. Estes conversores apresentam como modificações para evitar a interferência entre os conversores no momento da desmagnetização de seus transformadores e para que pudessem ser ligados em paralelo o uso de um único filtro de saída para os quatro módulos de conversores e chaves bidirecionais nos secundários de seus transformadores. O conversor Forward é conhecido por apresentar uma estrutura simples quando comparado com outros conversores. É apresentada uma completa análise das etapas de operação, equações necessárias, bem como os procedimentos de projeto para a correta operação dessa topologia. Através do projeto dos transformadores, pôde-se dimensionar o núcleo de ferrite, o número de espiras dos enrolamentos, determinar os condutores elétricos, as chaves semicondutoras, os diodos e o filtro de saída. Com a divisão de potência de 150 W para cada conversor e potência resultante de 600 W para todo o conjunto e trabalhando em alta freqüência de chaveamento de 50 kHz, projetou-se um inversor de tensão em baixa freqüência (60 Hz), com núcleos magnéticos pequenos e com baixo nível de ruído, que oferece um rendimento como uma estrutura de um único estágio de conversão. Resultados obtidos de simulação que correspondem ao funcionamento completo do circuito e do protótipo implementado são apresentados para validar a análise do sistema. O presente trabalho foi aprovado e validado em congressos nacionais e revista científica e tecnológica da Universidade Estadual de Londrina.<br>With the qualitative and quantitative study of the DC DC converters, including conventional Forward converter, of the method of control of the keys known like Pulse width modulation or PWM, the importance of the dead time and the study of DC AC convertes, it was possible show in this work an analysis of a new topology of voltage inverter, also known as DC AC converter, consisting of four modified Forward converters connected in parallel. These converters have modifications to avoid interference among converters i the moment of demagnetizing of their transformers and they could be connected in parallel using a single output filter for the four modules of converters and bidirection switches the secondary of their transformers. The Forward converter is known to have a simple structure compared to other converters. It is presented a complete analysis of the stages, equations and procedures for the correct operations of the present topology. By the project of transformers, it was possible to dimension the core, the number of turns, determine the electrical conductors, the semiconductor switches, diodes and the output filter. With the division of power of 150 W for each converter and power resulting of 600 W for the all group and working in high switching frequency of 50 kHz, it was possible to project a voltage inverter with low frequency (60 Hz), with small magnetics cores and low noise level, and it can offer an income like a structure of a single stage of convertion. Simulation results, which they corresponding to the complete operation of the circuit ando of prototype implemented are shown to validate the analysis system. This present work wass approved and validated in national congresses and science and technology magazine of State University of Londrina.
12
Bujoreanu, Denis. "Échographie compressée : Une nouvelle stratégie d’acquisition et de formation pour une imagerie ultrarapide." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI098/document.
Full textAbstract:
Il ne fait aucun doute que le coût relativement faible des échographes, la procédure rapide et la capacité d’imager des tissus biologiques mous ont permis à l’échographie de devenir l’un des outils de diagnostic médical les plus courants. Malheureusement, l’imagerie ultrasonore présente encore des inconvénients par rapport à d’autres techniques d’imagerie médicale, principalement en termes de qualité d’image et de détails fournis. Dans le souci d’améliorer la qualité d’image, le prix à payer est généralement la baisse de la cadence d’acquisition. Ce compromis profondément enraciné entre la qualité d'image fournie et le temps d'acquisition est peut-être l'un des plus difficiles verrous de la recherche dans le domaine de l’échographie et son dépassement pourrait mener à des meilleures performances des applications existantes et même à des nouvelles utilisations de l’échographie. Ce travail de thèse porte sur l’amélioration du compromis précédemment indiqué entre la qualité d’image et la cadence d’acquisition. En combinant des concepts tels que l’imagerie par ondes planes, les systèmes à entrées multiples / sorties multiples et les problèmes inverses, ce travail vise à acquérir simultanément des images ultrasonores du tissu insonifié, ce qui permet d’augmenter la cadence d’acquisition sans réduire la qualité de l’image fournie. À travers cette étude, nous avons mis au point un modèle mathématique permettant de modéliser la propagation des ondes ultrasonores dans les tissus mous. Ce modèle a été utilisé pour passer en revue un grand nombre de schémas d’acquisition en échographie déjà existants et pour exposer leurs avantages et leurs inconvénients. Nous avons proposé de surmonter le compromis qualité / cadence d’acquisition d'images en utilisant des ondes ultrasonores codées temporellement émises simultanément, et le modèle direct généré a permis l'utilisation des différentes approches de problèmes inverses afin de reconstruire la réponse impulsionnelle pulse / écho du milieu insonifié et donc de son image. De plus, nous avons encore amélioré le modèle direct, ce qui nous a permis de relier directement les échos rétrodiffusés à la position / magnitude des diffuseurs à l'intérieur du milieu imagé. Les résultats fournies par les approches de problèmes inverses basées sur ce modèle amélioré nous ont mis devant une méthode de pointe qui non seulement améliorent d’un facteur conséquent la qualité de l'image en termes de résolution et de cohérence du speckle, mais permettent également d'améliorer la cadence d'acquisition d’images<br>It is beyond doubt that the relative low cost of ultrasound scanners, the quick procedure and the ability to image soft biological tissues helped ultrasound imaging to become one of the most common medical diagnostic tools. Unfortunately, ultrasound still has some drawbacks when compared to other medical imaging techniques mainly in terms of the provided image quality and details. In the quest for an improved image quality, usually, the price to pay is the drop in the frame acquisition rate. This deep rooted trade-off between the provided image quality and the acquisition time is perhaps one of the most challenging in today’s ultrasound research and its overcoming could lead to diagnostic improvements in the already existing ultrasound applications and even pave the way towards novel uses of echography. This study addresses the previously stated trade-off. Through a mix of such concepts as plane wave imaging, multiple-input /multiple-output systems and inverse problems, this work aims at acquiring ultrasound images of the insonified tissue simultaneously, thus providing an increased frame rate while not degrading the image quality. Through this study we came up with a mathematical model that allows modelling the ultrasound wave propagation inside soft tissues. This model was used to review a great number of existing ultrasound acquisition schemes and to expose their advantages and drawbacks. We proposed to overcome the image quality / frame rate trade-off by using temporally encoded ultrasound waves emitted simultaneously, and the generated direct model enabled the use of different inverse problem approaches in order to reconstruct the pulse-echo impulse response of the insonified medium and thus its image. Moreover, we further improved the direct model, which allowed us to directly link the backscattered echoes to the position / magnitude of the scatterers inside the imaged medium. The results yielded by the inverse problem approaches based on the former model put us face to face with state of the art method that not only increase the image quality several times in terms resolution and speckle coherence but also provide a boost in frame acquisition rate
13
Teixeira, Emerson da Silva. "Controle de Rottboellia cochinchinensis nas culturas de milho e soja em diferentes manejos de inverno." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Agronomia, 2012. http://www.bibliotecadigital.uel.br/document/?code=vtls000178753.
Full textAbstract:
Dentre as plantas daninhas que ocorrem nas culturas de milho e soja no Brasil destacam-se as monocotiledôneas. Atualmente, o Rottboellia cochinchinensis (capim camalote) preocupa devido ao seu elevado potencial de competição e disseminação. O presente trabalho teve o objetivo de avaliar o controle da R. cochinchinensis nas culturas de soja e milho com sucessão de milho, trigo e aveia. Foram realizados três experimentos para cada cultura, diferenciando-os apenas na cultura de sucessão. O delineamento foi blocos ao acaso com cinco tratamentos e quatro repetições. Os tratamentos foram glyphosate (520 g.i.a. ha-1), glyphosate (520+520 g.i.a. ha-1), clethodim (108 g.i.a. ha-1), testemunha capinada, sem controle, para cultura de soja e nicosulfuron+atrazine (48+1000 g.i.a. ha-1), nicosulfuron+atrazine (24+1000 g.i.a. ha-1), tembotriona+atrazine (100,8+1000 g.i.a. ha-1) , testemunha capinada e sem controle, para cultura de milho. As aplicações dos herbicidas foram realizadas com uso do pulverizador costal pressurizado com CO2,em pós emergência das plantas de R. cochinchinensis. As avaliações de controle foram realizadas aos 7, 14, 28 dias após a aplicação (DAA), a determinação da produtividade no final do ciclo das culturas de milho e soja. A densidade das plântulas do capim camalote ocorreram em setembro de 2011, após o manejo ou colheita das culturas de inverno. Os dados de controle e produtividade da soja e milho foram submetidos à análise de variância e suas médias comparadas pelo teste de tukey ao nível de 5% de probabilidade. Os dados de densidade de R. cochinchinensis foram submetidos a análise conjunta de experimentos e suas médias comparadas pelo teste de tukey ao nível de 5% de probabilidade. Os herbicidas utilizados na cultura da soja apresentaram controle superior a 90% 28 aos DAA não diferindo do testemunha capinada na eficiência e produtividade. A densidade das plântulas de R. cochinchinensis diferiu apenas testemunha sem capina com os demais e entre si com as diferentes áreas de sucessões. A testemunha capinada na cultura de milho qual melhor resposta não diferindo significativamente a mistura de nicosulfuron+atrazine (48+1000 g.i.a. ha-1) aos 28 DAA, o nicosulfuron+atrazine (24+1000 g.i.a. ha-1) exerceu bom controle e o tembotrina+atrazine (100,8+1000 g.i.a. ha-1) foi ineficiente no controle do capim camalote. A densidade das plântulas de R. cochinchinensis não diferenciou entre os tratamentos com os melhores controles, a densidade foi superior no tembotrina+atrazine (100,8+1000 g.i.a. ha-1) do que na testemunha sem capina. Na sucessão com milho, morto pela geada, ocorreu mais densidade que as áreas com trigo e aveia.<br>Among the weeds that occur in soybean and corn in Brazil there are the monocots. Currently, Rottboellia cochinchinensis (itchgrass) concerned due to its high potential for competition. This study aimed to evaluate the control of R. cochinchinensis for soybean and corn succession of corn, wheat and oats. Three experiments were conducted for each culture, differing only in the culture of succession. The design was randomized blocks with five treatments and four replications. The treatments were glyphosate (520 g.i.a. ha-1), glyphosate (520 + 520 g.i.a. ha-1), clethodim (108 g.i.a. ha-1), manual control, no control for soybean and nicosulfuron + atrazine (48 +1000 g.i.a. ha-1), nicosulfuron + atrazine (24 +1000 g.i.a. ha-1), tembotrione + atrazine (100.8 +1000 g.i.a. ha-1), manual control and without control for maize cultivation. Herbicide applications were made by spraying pressurized with CO2. The evaluations were performed to control 7, 14, 28 days after application (DAA), the determination of productivity in the final stage of soybeans and corn. The seedling emergence of itchgrass occurred in september 2011, after management or harvest of winter crops. The control data and yield of soybean and maize were subjected to analysis of variance and the averages compared by Tukey test at 5% probability. The emergency data R. cochinchinensis were subjected to analyzes of the experiments ant their means compared by Tukey test at 5% probability. The herbicide used on soybeans had greater than 90% control 28 DAA did not differ from manual control efficiency and productivity, seedling emergence of R. cochinchinensis differed only in the treatment out of control with others and with each other in different areas of succession. The manual control in corn which had a better response, the mixture of nicosulfuron + atrazine (48 +1000 g.i.a. ha-1) did not differ from the manual control at 28 DAA, nicosulfuron + atrazine (24 +1000 g.i.a. ha-1) obtained good control and tembotrina + atrazine (100.8 +1000 g.i.a. ha-1) was inefficient in controlling grass camalote. Seedling emergence of R cochinchinensis did not differ between treatments with better controls, emergence was higher in tembotrina + atrazine (100.8 +1000) than no treatment control. In succession to corn killed by frost areas, occurred more emergency than with weat and oat areas.
14
Aguiar, Ricardo Sfeir de. "Plantas de cobertura de inverno e de verão e desempenho da primeira safra de bananeira." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Agronomia, 2014. http://www.bibliotecadigital.uel.br/document/?code=vtls000191113.
Full textAbstract:
O objetivo deste trabalho foi avaliar o efeito de plantas de cobertura de inverno e de verão sobre a produção de primeiro ciclo da bananeira cultivar Nanicão Jangada, em dois experimentos realizados no município de Andirá-PR. O trabalho foi realizado em pomar comercial e o plantio do bananal ocorreu na primeira quinzena de março de 2011, com espaçamento entre linhas de 2,40 m e de 1,90 m entre plantas, com mudas de rizomas da própria área do produtor. Os experimentos foram instalados em delineamento experimental de blocos ao acaso com quatro repetições e seis plantas úteis por parcela. Foram utilizados seis diferentes tipos de manejo de solo no experimento de inverno: nabo forrageiro, aveia preta, consórcio aveia preta mais nabo forrageiro, cama de frango, restos culturais da bananeira e limpeza total da área. No experimento de verão foram utilizados cinco tratamentos: feijão de porco, mucuna anã, Crotalaria spectabilis, limpeza total da área e restos culturais da bananeira. Para os dois experimentos foram realizadas avaliações de massa fresca e massa seca nos adubos verdes; características vegetativas, produtivas e qualitativas da bananeira e de seus frutos e avaliações das características químicas do solo. Os resultados foram submetidos à análise de variância complementada pelo teste de Tukey a 5% de probabilidade. Para o experimento de inverno observou-se que os sistemas de manejo do solo não tiveram efeito sobre as variáveis, exceto para os períodos entre o plantio e o florescimento e entre o plantio e a colheita, que foram mais curtos no tratamento da cobertura do solo com resíduos vegetais e mais longos com o tratamento de nabo forrageiro, sendo intermediários nos demais tratamentos; o nabo forrageiro e o consórcio aveia preta mais nabo forrageiro foram superiores à aveia preta na produção de biomassa. No experimento de verão houve altas taxas de produção de biomassa das leguminosas estudadas, que podem ser recomendadas como manejo do solo na produção da primeira safra de bananeira Nanicão Jangada no Norte Pioneiro do Paraná, pois não afetam o ciclo, a produção e a qualidade dos frutos.<br>The objective of this study was to evaluate the effect of summer and winter cover crops on the production of the first cycle of banana cv. Nanicão Jangada in two experiments at the municipality of Andirá PR, Brazil. The experiment was placed in a commercial area and the planting of banana suckers from the grower area occurred in the first half of march 2011 with a spacing of 2,40 m between rows and 1,90 m between plants. The experiments were designed in randomized blocks with four replications and six plants per plot. The winter treatments were: forage turnip, black oat, intercropping of black oat with forage turnip, chicken litter, plant debris of banana and cleaning up the area. In the summer five different systems of soil covering were used: jack bean, dwarf mucuna, Crotalaria spectabilis, cleaning up of the area and plant debris of banana. In the two experiments the evaluations were: fresh and dry mass of cover crops, vegetative and productive characteristics of the banana plants, quality of their fruits and chemical characteristics of soil. The results were submitted to ANOVA, and Tukey test at 5% of probability. For the first experiment it was observed that the systems of soil management had no effect on the variables, except in the periods between planting and flowering and between planting and harvesting, which were shorter in the treatment of soil management with crop residues and longer in the treatment with forage turnip, being intermediate in other treatments; black oat and black oat consortium with forage turnip were superior in biomass production. In the summer experiment it was observed that the studied leguminous cover crops can be recommended as soil management in the production of the first crop of banana 'Nanicão Jangada' because they have high rates of biomass production and do not affect the banana plants cycle, production and fruit quality.
15
Ricce, Wilian da Silva. "Dessecação da pastagem de inverno para implantação da cultura da soja / Willian da Silva Ricce." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Agronomia, 2006. http://www.bibliotecadigital.uel.br/document/?code=vtls000119688.
Full textAbstract:
O objetivo deste trabalho foi avaliar se a dessecação da pastagem de inverno pode influenciar na produtividade da cultura da soja. A dissertação é composta de uma revisão de literatura e dois artigos. Na revisão de literatura são apontados os fatores que devem ser considerados para a escolha da época dequada para a dessecação da pastagem de inverno, sendo: época de retirada dos animais da pastegem de inverno, a pastagem utilizada ou a espécie utilizada para formação de palha, a quantidade de palhada no momento da dessecação, as máquinas e implementos utilizados na semeadura, o herbicida a ser utilizado e a presença de plantas daninhas na área. No primeiro artigo foram avaliadas 4 épocas de dessecação (30, 20, 10 e 0 dias antes da semeadura) e no segundo artigo foram avaliadas 4 épocas de dessecação (30, 20, 10 e 0 dias antes da semeadura) e 4 manejos da pastagem de inverno (7, 14, 21 e 28 cm). O experimento foi realizado em área de integração lavoura-pecuária na Fazenda Experimental da Coamo em Campo Mourão ? PR nas safras de 2002, 2003 e 2004. Foram avaliados: a quantidade de matéria seca da pastagem de inverno no dia da semeadura, a altura de plantas, o número de plantas por metro linear, os componentes de rendimento e a produtividade de grãos de soja. No primeiro artigo conclue-se que: a essecação realizada no dia da semeadura pode causar diminuição na produtividade de grãos, a dessecação pode ser realizada a 10, 20 e 30 dias antes da semeadura sem prejuízos para a produtividade de grãos de soja e Os componentes de rendimento se ajustam para compensar a produtividade de grãos, a redução no número de plantas por metro foi compensada pelo maior número de vagens por planta. Já no segundo artigo, conclue-se que um manejo inadequado da pastagem de inverno pode reduzir a produtividade da soja e a recomendação da época de dessecação deve levar em consideração o manejo da pastagem de inverno.<br>The objetive was to evaluate if the burndown of the winter pasture can influenciate in the soybean productivity. The dissertation is compost by one literature revision and two articles. In the literature revision the factors are pointed that must be considered for the choice of the winter pasture burndown timing, which are: time to take off the animals from the winter pasture, the pasture specie used for mulch, the mulch amount at the burndown moment, the machines and implements used in the sowing, the herbicide to be used and the weed presence in the area. In the first article 4 times of burndown had been evaluated (30, 20, 10 and 0 days before sowing) and in the second article had been evaluated 4 times of burndown (30, 20, 10 and 0 days before sowing) and 4 winter pasture management (7, 14, 21 and 28 cm). The experiment was carried through in area of farming-cattle integration in the Experimental Farm of the Coamo in Campo Mourão - PR in the crops of 2002, 2003 and 2004. Were evaluated: the amount of dry matter of the pasture of winter in the sowing day, the height of plants, the number of plants for linear meter, the yield components and the productivity of soybean grains. In the first article conclues that: the burndown in the sowing day can cause reduction in the productivity of grains, the burndown can be executated at 10, 20 and 30 days before the sowing without damages for the soybean productivity and the yield components adjust to compensate the productivity of grains, the reduction in the number of plants for meter was compensated by the biggest number of legume for plant. In the second article, conclue that an inadequate management of the winter pasture can reduce the productivity of the soybean and the recommendation of the burndown timing must take in consideration the management of the winter pasture.
16
Moura, Naira Cuareli de. "Avaliação de espécies oleaginosas de inverno em diferentes regiões fisiográficas do Paraná para produção de biodiesel." UEL. UEM. UEPG. UNIOESTE. UNICENTRO. Centro de Ciências Exatas. Programa de Pós-Graduação em Bioenergia, 2012. http://www.bibliotecadigital.uel.br/document/?code=vtls000171095.
Full textAbstract:
O Paraná se destaca como um dos grandes produtores de soja e milho, porém, no inverno boa parte da área ocupada, principalmente nas regiões com clima mais ameno do estado, permanece ociosa. Com o objetivo de se avaliar o potencial de espécies adaptadas a essa condição de clima, o presente trabalho que faz parte do Projeto "Viabilização de matérias primas vegetais para produção e uso de biodiesel no Paraná", integrante do Programa de Agroenergia do IAPAR, (Instituto Agronômico do Paraná), foi conduzido nas safras de outono/inverno de 2007, 2008 e 2009 um experimento com quatro espécies de oleaginosas de inverno: Canola( Brassica napus L), Crambe (Crambe abyssinica), Cartamo (Carthamus tinctorius L), e Nabo Forrageiro (Raphanus sativus L). Os ensaios foram conduzidos em oito regiões fisiográficas do estado do Paraná. Os atributos estudados foram: produção de grãos, teor de óleo e ciclo das cultivares. Os dados indicam que praticamente todas as espécies apresentam potencial para a produção de óleo quando cultivadas na safra de outono/inverno. No entanto, todas apresentam alguma restrição quanto ao ciclo, produção de grãos, manejo e colheita, ou disponibilidade de sementes. Isto é um indicativo de que a pesquisa tem muito a contribuir para que esses ajustes sejam realizados para que essas alternativas se tornem uma opção rentável para o agricultor e também mantendo o fluxo de matéria prima para a indústria de óleo.<br>The Paraná stands as a major producer of soybeans and corn, butin winter most of the occupied area, especially in regions with warmer climate of the state, remains idle. In order to evaluate the potential of species adapted to this condition of climate, the present study is part of the project Feasibilit of raw materials for vegetable production and use of biodiesel en Paraná, part of program Agroenergy IAPAR( Agronomic Institute of Paraná), wasconducted during the harvest of autumn/ winter 2007,2008 and 2009 an experiment species of winter oilseeds: canola (Brassica napus L), Crambe (Crambe abyssunica), Safflower ( Carthamus tinctorius L) and wild radish ( Raphanus sativus L). The tests were conduted in eight geographical regions of state of Paraná. The attributes studied were: grain yield, oild content and cycle of cultivars. The data indicate that virtually all species have potential foe oil production when grown in the harvest of autumn / winter. However, all have some restriction on the cycle, grains production management and harvesting, or availability of seeds. This is an indication that te research has much to contribute to these adjustments to be made for these alternatives become a profitable opition for the farmer and also maintaining the flow of raw material for the oil industry.
17
Bernal, Laura Priscila Toledo. "Bioindicadores de qualidade em solo sob plantio direto e convencional, com e sem adubação verde de inverno." Universidade Estadual de Londrina. Centro de Ciências Biológicas. Programa de Pós-Graduação em Microbiologia, 2008. http://www.bibliotecadigital.uel.br/document/?code=vtls000147346.
Full textAbstract:
Os bioindicadores de qualidade de solo, principalmente os relacionados aos ciclos do carbono (C) e nitrogênio (N) são úteis para avaliar o efeito do manejo do solo e da rotação de culturas sobre a dinâmica do C e do N no solo. O objetivo desse trabalho foi avaliar as alterações que ocorrem em indicadores biológicos, físicos, químicos e bioquímicos de qualidade, em solo sob plantio direto ou convencional, com ou sem adubação verde de inverno. O estudo foi realizado na Fazenda-escola da Universidade Estadual de Londrina/PR em área há 5 anos sob plantio direto ou convencional, em combinação a realização ou não de adubação verde de inverno com aveia preta (Avena sativa) e cultivado com milho (Zea mays) no verão, em um Nitossolo Vermelho eutroférrico. As amostras de solo (0-10 cm) foram obtidas em novembro/2007, antes da instalação da cultura de verão. Foram avaliadas variáveis como respirometria, carbono e nitrogênio da biomassa microbiana, relação C/N da biomassa, qCO2, carbono e nitrogênio totais, razão Cmic/Corg e Nmic/Norg, taxa de amonificação e nitrificação, pH, argila dispersa em água, fósforo disponível, desidrogenase, celulase, glutaminase e fosfatase ácida. Com relação às variáveis do ciclo do C, a maioria dos resultados obtidos não foi influenciada pelos tratamentos. Entretanto, houve efeito significativo sobre a maioria das variáveis relacionadas ao ciclo do N, indicando maior sensibilidade dessa variável ao manejo do solo. A área sob plantio direto com adubação verde apresentou maior biomassa microbiana de nitrogênio, o que esteve relacionado com o teor de nitrogênio total e a razão Nmic/Norg. O qCO2 não apresentou diferença significativa entre os tratamentos, porém houve uma tendência em ser menor na área de plantio direto e com adubação verde de inverno. Desidrogenase e celulase mostraram tendência contrária às variáveis do nitrogênio, com maior atividade na área sob plantio convencional sem aveia e plantio convencional com aveia, respectivamente. Entretanto, a glutaminase apresentou alta atividade, relacionando-se com as variáveis do ciclo do N, no tratamento sob plantio direto com presença de adubação verde, diferente da fosfatase ácida, que se apresentou com uma atividade reduzida no sistema de plantio convencional sem adubação verde de inverno. As variáveis relacionadas ao ciclo do N apresentaram maior dinâmica em função dos tratamentos, elegendo-as como sensíveis indicadores para avaliar efeito do manejo e cobertura vegetal do solo.<br>Bioindicators of soil quality, especially those related to the carbon (C) and nitrogen (N) cycles, are useful for evaluating the effects of soil and crop rotation management on C and N dynamics in soil. The objective of this work was to evaluate alterations in biological, physical, chemical and biochemical indicators of quality, in soil under no-tillage or conventional planting systems, with or without winter green manures. The study was carried out at the Universidade Estadual de Londrina experimental farm in Londrina/PR, in soil under no-tillage or conventional areas for 5 years, in combination both with and without winter green manuring with black oat (Avena sativa) and cropped with corn (Zea mays) in summer, in Eutroferric Red Nitosol. The soil samples (0-10 cm) were obtained in november/2007, before summer crop installation. Evaluations of variables such as respirometry, microbial biomass carbon and nitrogen, biomass C/N ratio, qCO2, total carbon, total nitrogen, Cmic/Corg and Nmic/Norg ratio, ammonification and nitrification rates, pH, water dispersible clay, available soil phosphorus, dehydrogenase, cellulase, glutaminase and acid phosphatase were performed. In relation to variables related to C cycle, most of the experimental results were not influenced by the treatments. However, there was significant effect on most of variables related to the N cycle, what indicates high sensitivity of this variable to soil management. No-tillage area with winter green manuring presented greater microbial nitrogen biomass, what was associated with total nitrogen and Nmic/Norg ratio. qCO2 did not present significant difference among the treatments, but there was a trend to lower values in no-tillage with winter green manures area. Dehydrogenase and cellulase presented opposite trend to nitrogen variables, with higher activity in no-tillage area without oat and conventional area with oat, respectively. Glutaminase, however, presented high activity, what was associated with N cycle variables, in the treatment of no -tillage with winter green manures, unlike acid phosphatase, that presented low activity in conventional planting system without winter green manures. Variables related to the N cycle were more dynamic with the treatments and constitute indicators with high sensitivity to effects of soil management and vegetation coverage.
18
Silva, Emerson Charles Martins da. "Inversor de tensão com topologia push-pull para injeção de potência na rede elétrica com modulação SPWM." Universidade Estadual de Londrina, 2012. http://www.bibliotecadigital.uel.br/document/?code=vtls000177940.
Full textAbstract:
Este trabalho apresenta uma proposta de um inversor de tensão baseado na topologia push-pull para injeção de potência na rede elétrica, podendo ser implantado em um sistema de cogeração de energia oriunda de uma fonte de energia em corrente contínua qualquer. É feita uma análise do conversor push-pull e da topologia apresentada utilizando os conceitos do mesmo, e assim é apresentado os resultados teóricos e práticos com o desenvolvimento de um protótipo com a técnica utilizada.<br>This paper presents a proposal for a voltage inverter based on the push-pull topology for power injection of the power grid and can be deployed in a system of co-generation of energy from a source of DC power whatsoever. An analysis is made of the push-pull converter topology and displayed using the same concepts, and thus is presented the theoretical results and practical development of a prototype with the technique used.
19
Suquila, Fabio Antonio Cajamarca. "Extração e caracterização do óleo de cultivares de inverno visando a produção de biodiesel no estado do Paraná." Universidade Estadual de Londrina, Universidade Estadual de Maringá, Universidade Estadual de Ponta Grossa, Universidade Estadual do Centro-Oeste, Universidade Estadual do Oeste do Paraná, Universidade Federal do Paraná, 2015. http://www.bibliotecadigital.uel.br/document/?code=vtls000210716.
Full textAbstract:
Este trabalho tem como objetivo comparar as características físicas dos grãos de Camelina (Camelina Sativa L.), Canola (Brassica napus L.), Cártamo (Carthamus tinctorius), Crambe (Crambe abyssinica), Linhaça (Linum usitatissimum) e Nabo Forrageiro (Raphanus sativus L), cultivados pelo IAPAR na época de outono / inverno em quatro locais do Estado do Paraná, e avaliar alguns parâmetros de qualidade dos óleos para a produção de Biodiesel. Assim, com os dados obtidos, pretende-se contribuir ao projeto do IAPAR e propor o cultivo das espécies oleaginosas que apresentem os melhores resultados como opção para a entressafra entre as culturas de verão e inverno, e ao mesmo tempo atender a demanda de produção do Biodiesel. Este trabalho inicia-se com o beneficiamento e armazenamento dos grãos, seguido da classificação granulométrica, massa de 1000 grãos e fração lipídica. Finalmente, culmina com a extração, degomagem e caracterização dos óleos, sendo o índice de acidez e perfil de ácidos graxos os parâmetros químicos analisados. Com base nos resultados obtidos, conclui-se que as condições edafoclimáticas dos locais, especificamente a temperatura, não tem efeito sobre a massa de 1000 grãos e a fração lipídica (teor de óleo) dos grãos. O teor de óleo das oleaginosas estudadas é superior quando comparado a Soja, destacando-se o Crambe, seguido pela Canola, Linhaça, Cártamo e Nabo Forrageiro. Os óleos brutos extraidos foram degomados para reduzir o índice de acidez, favorecer a reação de transesterificação e atingir o valor preconizado pela ANP N° 14/2012 (máx. 0,50 mgKOH/g). A percentagem dos ácidos graxos saturados e insaturados presentes nos óleos variou com a temperatura de cada local, obtendo-se maiores percentagens de ácidos graxos insaturados em Guarapuava, seguido de Santa Tereza do Oeste, Londrina e Cambará. As oleaginosas estudadas podem ser consideradas como culturas promissoras para a produção de grãos na época de inverno e Biodiesel nos quatro locais.<br>The aim of this work is to compare the physical characteristics of the following grains: Camelina (Camelina Sativa L.); Canola (Brassica napus L.); Safflower (Carthamus tinctorius); Crambe (Crambe abyssinica); Flaxseed (Linum usitatissimum) and Forage Turnip (Raphanus sativus L), which are grown by the IAPAR during the autumn/winter at four locations in the State of Paraná. It also seeks to evaluate a number of parameters of oil quality for the production of Biodiesel. Afterwhich, oilseed species achieving the best results will be proposed as optional crop candidates for the off season between summer and winter crops, thereby contributing to the IAPAR project while concomitantly supplying the production demand of Biodiesel. This work begins with the processing and storage of grains, followed by grain size classification, 1,000 grain mass, lipid fraction and ends with the extraction, degumming and chemical characterization of oils (acid value and fatty acid profiles). With the obtained results, it was concluded that soil and climatic conditions of the locations, specifically the temperature, had no effect on the 1,000 grain mass and the lipid fraction (oil content) of the grains. The oil content of oilseed species studied was higher than that of soybean, Crambe in particular, followed by Canola, Flaxseed, Safflower, and Forage Turnip. Crude oils extrated were degummed to reduce the acid value, promote the transesterification reaction and reach the value expected by the ANP N° 14/2012 (max. 0,50 mgKOH/g). The percentage of saturated and unsaturated fatty acids present in the oils varied with the temperature of each location, obtaining higher percentages of unsaturated fatty acids in Guarapuava, followed by Santa Tereza do Oeste, Londrina and Cambará. The oilseed species studied can be considered as promising crops for grain and subsequent Biodiesel production during the winter season in all four locations.
20
Rodrigues, Marcus Vinícius Maia. "Controlador multimalhas para inversor monofásico e chave estática de transferência aplicados em fontes ininterruptas de energia do tipo Passive Standby." Universidade Estadual de Londrina. Programa de Pós-Graduação em Engenharia Elétrica, 2016. http://www.bibliotecadigital.uel.br/document/?code=vtls000204593.
Full textAbstract:
Este trabalho apresenta o controle de um inversor monofásico e do acionamento de uma chave estática de transferência, ambos aplicáveis a fontes ininterruptas de energia. O controle do inversor apresenta um arranjo de duas malhas, onde é usada uma malha interna de corrente e outra externa de tensão. O trabalho traz um modelo de projeto de controladores proporcional-integral e proporcional-ressonante em malha fechada para o inversor, levando em conta o atraso da resposta dinâmica do modulador PWM digital, que é um fator que limita os ganhos do compensador. Também é apresentado o funcionamento da chave estática de transferência (STS), que permite a transferência da alimentação de uma carga crítica de uma fonte principal para uma auxiliar quando ocorrer algum distúrbio. São utilizadas duas topologias de STS, uma composta por tiristores e outra por IGBTs, sendo realizada a comparação e análise do desempenho de ambas. Para o controle da chave estática dois algoritmos para detecção de distúrbio são utilizados: o primeiro método é baseado no sistema de coordenadas dq e o segundo é baseado na detecção de amplitude do sinal por PLL.<br>This paper presents the control of a single-phase inverter and the drive of a static transfer switch, both applicable to uninterruptible power systems. The inverter control shows an arrangement of two loops, where an inner current loop and other external voltage is used. The paper presents a design model for proportional-integral and proportional-resonant controllers for closed loop operation of the inverter, taking into account the delay of the dynamic response of the digital PWM modulator, which is a factor that limits the compensator gains. The operation of the static transfer switch (STS), which allows the transfer of power to a critical load of a main source for an auxiliary when a disturbance occurs is also presented. Two STS topologies are used: one consisting of thyristors and other by IGBTs being performed the comparison and analysis of both performances. For the static switch control two algorithms for detection disturbance are used: the first method is based on the dq coordinate system and the second is based on the signal amplitude detection by PLL.
21
Ferreira, Magda Cristiani. "Manejo de coberturas vegetais de inverno e de herbicidas no controle das plantas daninhas na cultura da soja em plantio direto." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Agronomia, 2009. http://www.bibliotecadigital.uel.br/document/?code=vtls000151596.
Full textAbstract:
O objetivo deste trabalho foi avaliar a influência de diferentes alternativas de manejo de coberturas vegetais de inverno no controle de plantas daninhas na cultura da soja no sistema plantio direto. Foram conduzidos dois experimentos em condições de campo no ano agrícola 2006/07 na estação experimental do IAPAR - Londrina, PR: O primeiro com objetivo de avaliar a influência de coberturas vegetais de inverno manejadas com rolo faca e sem manejo no controle de plantas daninhas. O segundo com o objetivo de avaliar a influência das coberturas vegetais no desempenho dos herbicidas de manejo e em pós-emergência na cultura da soja no sistema de plantio direto. O delineamento experimental foi o de blocos ao acaso com parcelas subdivididas e três repetições. Os tratamentos foram: 1 - sem cobertura; 2 - aveia-preta + tremoço branco; 3 - aveia preta + nabo forrageiro; 4 - aveia preta isoladamente; 5 - aveia preta + ervilha forrageira; 6 - aveia preta + centeio; 7 - aveia preta + centeio + nabo forrageiro 8 - cobertura natural (pousio de inverno). As subparcelas do primeiro experimento foram: 1 utilização de rolo faca no manejo das coberturas e capinas manuais na soja; 2 - rolo faca no manejo das coberturas e ausência de controle de plantas daninhas na soja; 3 - sem manejo das coberturas vegetais e sem controle de plantas daninhas na soja. No segundo experimento as subparcelas foram constituídas por: 1 - aplicação de glifosato na dose de 3,0 L ha-1 do produto comercial isoladamente na dessecação das coberturas seguido de semeadura da soja; 2 - glifosato (3,0 L ha-1) na dessecação, seguido de semeadura da soja e de aplicalção de herbicidas pós-emergentes, tepraloxidim (0,5 L ha-1) e acifluorfen-sódio + bentazon (1,5 L ha-1); 3 - glifosato (3,0 L ha-1) na dessecação, seguido de semeadura da soja e aplicação do herbicida com formulação pronta de imazetapir + glifosato na dose de 3,0 L ha-1 em préemergência; 4 - imazetapir + glifosato (3,0 L ha-1 p.c.) + glifosato (1,5 L ha-1 p.c.) na dessecação, seguido de semeadura da soja; 5 - imazetapir + glifosato (3,0 L ha-1) + glifosato (1,5 L ha-1) na dessecação, seguido de semeadura da soja e de aplicação de herbicidas pós-emergentes, tepraloxidim (0,5 L ha-1) e acifluorfen-sódio + bentazon (1,5 L ha-1); 6 - imazetapir + glifosato (3,0 L ha-1) + glifosato (1,5 L ha-1) na dessecação, seguido da semeadura da soja e de aplicação de glifosato (1,5 L ha-1) em pré-emergência e de herbicidas pós-emergentes, tepraloxidim (0,5 L ha-1) e acifluorfen-sódio + bentazon (1,5 L ha-1). O tratamento aveia preta + centeio foi o mais eficiente tanto na capacidade de suprimir a infestação de plantas daninhas como em produtividade e rentabilidade da soja nos dois experimentos. Os maiores índices de produtividade foram obtidos no subtratamento capinado em todos os tratamentos. Os sistemas de controle de plantas daninhas onde foram utilizados o herbicida com efeito residual imazetapir mostraramse mais eficientes no controle das plantas daninhas.<br>The aim of this paper is to evaluate the influence of different alternatives to managing winter vegetable mulch in the control of weeds in no-tillage soybean. Two experiments were conducted under field conditions in the agricultural year of 2006/07 in the experimental station of IAPAR - Londrina, PR. The objective of the first experiment was to evaluate the influence of winter vegetable mulch managed with a knife roll and with no weed control management. The second aimed to evaluate the influence of the vegetable mulch on the performance of post-emergence herbicides in no-tillage soybean crops. The experimental design used randomized blocks with sub-divided parcels and three repetitions. Treatments were: 1 - no mulch; 2 - Avena Strigosa + Lupinus albus; 3 - Avena Strigosa + Raphanus sativus; 4- isolated Avena Strigosa; 5 - Avena Strigosa + Pisum Sativum L.; 6 - Avena Strigosa + Secale cereale; 7 - Avena Strigosa + Secale cereale + Raphanus sativus; 8 - natural mulch (winter fallow). Subparcels in the first experiment were: 1 use of a knife roll in managing mulches and manual weeding in soybean; 2 knife roll in vegetable mulch management and no weed control in soybean, 3 - no vegetable mulch management and no weed control in soybean. Secondary treatments (subparcels) were constituted of different types of weed control in soybean: 1- application of glyphosate in the dosage of 3.0 L ha-1 of the commercial product isolated in the dissection of the mulches, followed by soybean planting; 2- glyphosate (3.0 L ha-1) on dissection, followed by soybean planting and application of post-emergence herbicides, tepraloxydim (0.5 L ha-1) and acifluorfen-sodium + bentazon (1.5 L ha-1); 3- glyphosate (3.0 L ha-1) on dissection, followed by soybean planting and application of herbicide with a ready formulation of imazethapyr + glyphosate in the dosage of 3.0 L ha-1 in pre-emergence; 4- imazethapyr + glyphosate (3.0 L ha-1 p.c.) + glyphosate (1.5 L ha-1 p.c.) on the dissection, followed by soybean planting; 5- imazethapyr + glyphosate (3.0 L ha-1) + glyphosate (1.5 L ha-1) on dissection, followed by soybean planting and the application of post-emergence herbicides, tepraloxydim (0.5 L ha-1) and acifluorfen-sodium + bentazon (1.5 L ha-1); 6- imazethapyr + glyphosate (3.0 L ha-1) + glyphosate (1.5 L ha-1) on dissection, followed by soybean planting and application of glyphosate (1.5 L ha-1) in pre-emergence and of post-emergence herbicides, tepraloxydim (0.5 L ha-1) and acifluorfen-sodium + bentazon (1.5 L ha-1). The Avena Strigosa + Secale sereale treatment was the most efficient, both in combating weed infestation and in soybean productivity and profitability, for both experiments. The highest productivity indexes were obtained by the weeding subtreatment in all treatments. Weed control systems with herbicides with imazethapyr residual effect were more efficient in weed control.
22
Azaouzi, Mohamed. "Modélisation et Optimisation numérique de l'emboutissage de pièces de précision en tôlerie fine." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2007. http://tel.archives-ouvertes.fr/tel-00345712.
Full textAbstract:
Le travail de ma thèse s'inscrit dans le cadre d'un projet industriel proposé par une entreprise luxembourgeoise (Gottschol-Alcuilux) et en collaboration avec le Centre de Recherche Public Henry Tudor du Luxembourg (Laboratoire des Technologies Industriels (LTI)). L'objectif consiste à mettre au point une méthode numérique de détermination de la forme des outils d'emboutissage et du flan de pièces de précision en tôlerie fine pour que ce dernier, une fois déformé en une ou plusieurs opérations, correspond à la définition tridimensionnelle du cahier des charges. La méthode a pour objectif de remplacer une démarche expérimentale coûteuse par essais–erreur. <br /><br />Deux démarches numériques ont été développées, la première est relative à la détermination de la forme du flan. Elle consiste à estimer la forme du flan par Approche Inverse en partant de la forme 3D demandée. Puis, un logiciel de simulation incrémental par éléments finis en 3D est utilisé dans une procédure d'optimisation heuristique pour déterminer la forme du flan. Dans la deuxième démarche, il s'agit de déterminer la forme des outils d'emboutissage en utilisant le logiciel de simulation incrémental couplé avec une méthode de compensation du retour élastique en 2D. La démarche numérique est validée expérimentalement dans le cas d'un emboutissage réalisé en une ou plusieurs passes, à l'aide d'une presse manuelle, sans serre flan et avec des outils de forme très complexe.
23
Marques, Leila Larisa Medeiros. "Efeito de pulsos de Rafinose e irradiação ultra-sonica na liberação da invertase de Saccharomyces cervisiae livre e imobilizado em bucha vegetal (Luffa cylindrica)." Universidade Estadual de Londrina. Centro de Ciências Exatas. Programa de Pós-Graduação em Biotecnologia, 2004. http://www.bibliotecadigital.uel.br/document/?code=vtls000106813.
Full textAbstract:
A invertase é uma enzima de grande interesse industrial, que catalisa a reação de hidrólise da sacarose, produzindo açúcar invertido. O uso de rafinose e irradiações ultra-sônicas pode proporcionar a liberação quantitativa de enzimas em sua forma ativa, e assim constituir uma ferramenta para a melhoria de processos biotecnológicos. Luffa cylindrica é um excelente suporte para a imobilização de células microbianas, exibindo vantagens como baixo custo e resistência a autoclavação. Neste trabalho investigou-se o efeito de pulsos de rafinose e ultra-som, na liberação de invertase de Saccharomyces cerevisiae livre e imobilizado em Luffa cylindrica. A cultura de células livres foi submetida a pulso de rafinose 2% e irradiada por 2 min, nas taxas de diluição 0,12 e 0,46 h-1. A cultura de células imobilizadas foi submetida a pulso de rafinose e irradiada por 1, 2 e 4 min, em taxa de diluição 0,10 h-1. Em células livres, o pulso de rafinose não alterou a atividade invertásica, entretanto, em células imobilizadas o valor da atividade aumentou de 5,38 para 7,27 U/mg. A aplicação do ultra-som, em cultivo de células livres na taxa de diluição 0,12 h-1, obtiveram os melhores resultados. A atividade variou de 25,08 para 29,38 U/mg, enquanto que o aumento em células imobilizadas foi de 5,22 para 9,70 U/mg, quando sonicadas por 2 min. Esses resultados demonstram que a aplicação de ultra-som, em cultivo contínuo, pode ter um grande potencial de aplicação em processos biotecnológicos.<br>The enzyme invertase is of great interest to industry because it catalyzes the sucrose hydrolysis reaction producing invert sugar. The use of raffinose and ultrasound irradiation can release large amounts of enzymes in their active form and thus it is a tool to improve biotechnological processes. Luffa cylindrica is an excellent support to immobilize microbial cells, showing advantages such as low cost and resistance to autoclaving. This study investigated the effect of raffinose and ultrasound pulses on invertase release from free S. cerevisiae and S. cerevisiae immobilized in Luffa cylindrica. The free cell culture was submitted to 2% raffinose pulse and irradiated for 2 minutes at dilution rates of 0.12 and 0.46 h-1. The immobilized cell culture was submitted to raffinose pulse and irradiated for 1, 2 and 4 minutes, at 0.10 h-1 dilution rate. In free cells, the raffinose pulse did not alter the invertase activity but in immobilized cells, the value of the activity increased from 5.38 to 7.27 U/mg. Ultrasound application in free cell culture at the 0.12 h-1 dilution rate gave the best results. The activity varied from 25.08 to 29.38 U/mg while the increase in immobilized cells was from 5.22 to 9.70 U/mg when sonicated for 2 minutes. These results showed that ultrasound application in continuous culture may have great potential for application in biotechnological techniques.
24
Yokoyama, Anderson Hideo. "Relação dos cultivos de inverno com a dinâmica do nitrogênio e o desempenho produtivo da soja em sucessão com dois níveis de adubação nitrogenada." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Agronomia, 2018. http://www.bibliotecadigital.uel.br/document/?code=vtls000219749.
Full textAbstract:
O impacto das culturas de entressafra, bem como os efeitos da interação dessas com a adubação nitrogenada na implantação das culturas de verão, precisam ser estudados nas plantas de soja (Glycine max) e na dinâmica de nitrogênio (N) do solo. O objetivo deste trabalho foi avaliar o efeito e diferentes culturas na entressafra da soja e sua interação com a adubação nitrogenada no desempenho agronômico da oleaginosa e na dinâmica de N solo. O experimento foi conduzido em delineamento experimental de blocos completos casualizados, com cinco repetições, em esquema de parcelas subdivididas. Avaliaram-se nas parcelas: pousio, braquiária (Urochloa ruziziensis), crotalária (Crotalaria spectabilis), milho (Zea mays) segunda safra com 0 e 80 kg de N ha-1 em cobertura e trigo (Triticum aestivum). Nas subparcelas foram testadas doses de N a implantação da soja (BRS 1010 IPRO indeterminada): 0 e 30 kg ha-1. Avaliaram-se a massa seca da cultura de inverno, índice de área foliar (IAF), índice SPAD, número de nódulos, massa dos nódulos, teor de ureídos, altura da planta, altura de inserção de primeira vagem, número de vagens por planta, número de grãos por vagem, massa de mil grãos, produtividade, teores de nitrato, amônio e nitrogênio total. O milho segunda safra com N em cobertura conferiu maiores valores de N-nitrato, até o mês de setembro. Adubação nitrogenada na soja com 30 kg de N ha-1 incrementou nos teores de N-nitrato do solo, somente nos primeiros 30 dias após a semeadura, coincidindo com o estádio V3-V4. O trigo resultou em menor IAF e SPAD da soja até a fase de formação das vagens. A soja que recebeu N conferiu maior IAF e SPAD até a fase de formação das vagens, porém a adubação nitrogenada reduz o número e a massa seca de nódulos, sem influenciar o teor dos ureídos. O milho com N incrementou a massa de mil grãos da soja. As culturas de entressafra e a adubação nitrogenada na soja não influenciam a produtividade de grãos da soja.<br>The impact of offseason crops, likely the effects of the interaction between the nitrogen (N) fertilization on the summer crops implantation, should be studied in the soybean (Glycine max) plants and N soil dynamic. The aim of this work was to evaluate the effect between off-season crops in soybean and interaction with N fertilization in soybean on the agronomic development and N soil dynamic. The experiment was conducted in a randomized complete block design, with five replications, in a split plot scheme. Evaluating in plots: Fallow, brachiaria (Urochloa ruziziensis), crotalaria (Crotalaria spectabilis), maize (Zea mays) as second season with 0 and 80 kg of N ha-1 in topdressing and wheat (Triticum aestivum). In the subplots were nitrogen tested in soybean implantation (BRS 1010 IPRO indeterminated): 0 and 30 kg ha-1. Evaluating off-season crops dry mass, leaf area index (LAI), SPAD index, height, first pod height insertion, number of pods per plant, number of grains per pod, thousand grains weight, grains yield, nitrate, ammonium and total nitrogen rates. Among the off-season crops, maize with N in cover showed higher values of N-nitrate in collections from May to October. Fertilization of soybean with N-mineral (30 kg of N ha-1) influenced soil nitrate content. Wheat results in a lower LAI and SPAD until pod development. The soybean with N provide higher LAI and SPAD until pod development and lower nodule number and nodule dry matter, but has no influence in ureides. Maize with N increases the mass of thousand grains. Offseason crops and N fertilization on soybean has no effect in soybean grain yield.
25
Filho, Abelar Baptista Pereira. "A inversão do ônus da prova no código de defesa do consumidor : a adoção de regra de julgamento e o risco de inefetividade dos processos contra instituições financeiras." Universidade Estadual de Londrina. Centro de Estudos Sociais Aplicados. Programa de Pós-Graduação em Direito Negocial, 2010. http://www.bibliotecadigital.uel.br/document/?code=vtls000164626.
Full textAbstract:
O presente trabalho realiza estudo acerca da distribuição do ônus de prova no processo civil brasileiro clássico, contrapondo-se à previsão excepcional, no micro-sistema legal definido pelo Código Brasileiro de Defesa do Consumidor, quanto à inversão do ônus da prova no caso concreto e por decisão judicial aos consumidores, quando preenchidos os requisitos definidos em lei. Especificamente, no que toca aos processos em que se discutam relações jurídicas entre consumidores e instituições financeiras, identifica a necessidade de provas técnicas delimitadoras e/ou quantificadoras, na maioria dos casos, necessárias à decisão líquida a ser prolatada nos referidos procedimentos, como forma de maior efetividade e celeridade no seu cumprimento, evitando-se a morosidade processual, o risco de inefetividade das decisões e, conseqüentemente, levando à prestação da tutela jurisdicional mais rápida e adequada. Para tanto, traz na introdução noções e concepções clássicas e modernas de direito, de processo e da forma de atuação jurisdicional socialmente esperada, hodiernamente. Em capítulos específicos, estuda a prova, distribuição de seu ônus às partes, os precedentes das possibilidades de inversão do onus probandi na doutrina estrangeira e pátria e a positivação de tal regra na lei consumerista, bem como a interpretação que lhe dá a doutrina e jurisprudência nacionais, majoritariamente como regra de julgamento-juízo, em detrimento da adoção da inversão como regra de atividade-procedimento. Por fim, examina as proposições de inovações legislativas em discussão, quanto ao Novo Código de Processo Civil Brasileiro e aos modelos de Código de Processo Coletivo apresentados à Ibero - América e ao Brasil, concluindo ser possível, tempestiva e oportuna a discussão sobre o tema, com possível inovação interpretativa pela doutrina e, até mesmo legislativa, no sentido de se considerar possibilidades de efetiva inversão procedimental do ônus de prova em casos tais, exclusivamente quanto às provas técnicas, com conseqüente inversão de ônus econômico destas, mantendo-se em relação às demais modalidades de prova a regra de juízo, em franco sistema híbrido, para que se alcancem os reais objetivos da tutela jurisdicional concebida pela mais atualizada doutrina, consoante os anseios da sociedade.<br>The present paper accomplishes a study about the burden of proof distribution in classical Brazilian civil procedure, as opposed to the exceptional prediction in the legal micro-system defined by the Brazilian Consumer Defense Code about the inversion of the burden of proof in concrete case and by judging decision to the consumers, when the formalities required by law are all fulfilled. Specifically about the lawsuits in which juridical relations between consumer and financial institution, it identifies the need of quantifying and/or bounding technical proof, in most of the cases, that are needed to the liquid rendering judgment in the mentioned procedures as a way to amplify the effectiveness and celerity in its accomplishment, avoiding the procedure slowdown, the ineffectiveness risk of the decisions and consequently leading to a faster and more adequate jurisdictional ward provide. For this, in its introduction it brings classical and modern notions and conceptions of justice, procedure and jurisdictional operation socially expected nowadays. In specific chapters it studies the proof, the burden distribution to the parts, the precedents of the inversion of the burden of proof possibilities in the national and foreigner doctrine and the affirmation of this rule in the consumer law, as well as the definition that the national doctrine and jurisprudence give to it, mostly as judgment rule in derogation of the adoption of the inversion as an activity-procedure rule. Finally, it examines the law inovation propositions in discuss, about the Brazilian New Civil Procedure Code and about the Collective Procedure Code ideals presented to the Ibero-American and Brazil, concluding to be possible, prompt and appropriate the discussion about the theme, with possible interpretative innovation by the doctrine and even though legislative, in the direction of considering effective procedural inversion of the burden of proof possibilities in such cases, exclusively about the technique proof with consequent economical burden inversion, keeping its relation to the other proof modalities in the judgment rule, in frank hybrid system, in order to reach the real goals of the jurisdictional ward conceived by the most updated doctrine, consonant the yearning of the society.
26
Simões, Gislaine Silveira. "Microambiente térmico no transporte de frangos no verão e inverno e ocorrência de PSE (pale, soft, exudative) e análogo ao DFD (dark, firm, dry) em filés de peito (Pectoralis major)." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Ciência de Alimentos, 2009. http://www.bibliotecadigital.uel.br/document/?code=vtls000149817.
Full textAbstract:
O microambiente térmico que se forma no caminhão de transporte de frangos da granja ao abatedouro pode ser a causa primária que compromete o bem estar das aves e a qualidade final da carne com o desenvolvimento de PSE (Pale, Soft, Exudative) e a-DFD (Dark, Firm, Dry) em filés de peito. O objetivo desta pesquisa foi investigar no inverno e verão a ocorrência de PSE e a-DFD em filés de peito de frango em um abatedouro comercial. Além de caracterizar o microambiente térmico no caminhão de transporte em diferentes distâncias no inverno e verão, investigouse o efeito do banho de água aplicado sobre os frangos no verão. No inverno, as distâncias de transporte de frangos foram 15 e 57 km e no verão foram 15, 35 e 55 km. Para caracterização do microambiente térmico no caminhão (frente, meio e fundo) foram utilizados termohigrômetros para registrar a temperatura e umidade relativa nas duas estações e termoanemômetros para registrar a velocidade do vento no verão. Para classificação dos filés de peito em PSE e a-DFD, o pH e a cor (L*, a* e b*) foram medidos nos filés de peito de frango 24h post mortem. A análise de regressão logística foi utilizada para verificar no inverno e verão, o efeito das distâncias de transporte de frangos, da região das caixas no caminhão (frente, meio e fundo) e da aplicação do banho de água sobre os frangos após o carregamento na ocorrência de PSE em filés de peito. O Teste de Tukey a 5% de significância foi utilizado para comparação de médias. A ocorrência de PSE em filés de peito de frango no verão (n= 540) foi de 55,5% e no inverno (n= 650) foi de 27,2%. A ocorrência de a-DFD foi de 0,9% apenas no inverno. Pela análise de regressão logística foi observado que no inverno a distância de transporte de frangos não apresentou efeito significativo (p= 0,7705) na ocorrência de PSE, sendo verificado cerca de 27% (n=270) de PSE nas duas distâncias. No inverno foi observado que a região do fundo do caminhão devido as temperaturas elevadas apresentou maior ocorrência de PSE, sendo 59% (n= 180). No verão, a distância de 55 km apresentou efeito significativo (p= 0,0002) na ocorrência de PSE, sendo verificado 57,8% (n=360) de PSE. No verão, as regiões do meio e fundo do caminhão apresentaram maior ocorrência de PSE, 51,8% (n= 360) e 54,6% (n= 360), respectivamente, devido a temperatura elevada e ventilação reduzida no microambiente destas regiões. A aplicação do banho de água sobre os frangos após o carregamento no caminhão reduziu a ocorrência de PSE em filés de peito no verão em cerca de 7,0% devido a redução de temperatura no microambiente do caminhão.<br>The thermal microenvironment produced during transportation from farm to the commercial slaughterhouse might be the primary cause to influence the broilers welfare consequently the final meat quality with development of breast fillet PSE (Pale, Soft, Exudative) and DFD-like (Dark, Firm, Dry) meat. The objective of this work was to investigate in the 2008 winter season (n=540) and summer season (n=650) the occurrence of PSE and DFD-like meat in an commercial abbatoir. Furthermore in both seasons the lorry thermal microenvironment was characterized in relation to temperature, relative moisture by thermologs and ventilation by thermoanemometer only in the summer. Also, the effect of watering application just before starting the transportation journey was evaluated in the summer on the meat color abnormalities. The distance run by the lorry was 15 and 57 km in the winter season and 15, 35 and 55 km in the summer season. Samples classification in PSE and DFD-like was carried ou by determining pH and color (L*, a* e b*) values on breast fillet taken 24h postmortem. The logistic regression analysis was used in order to verify in both seasons the effect of transport distance, location of birds boxes within the lorry areas (front, middle and rear) and birds? watering just before transportation. Tukey test 5.0% significance was applied for average comparison. Results showed PSE occurrence was 55.5% and 27.2% in the summer (n=650) and in the winter (n=540), respectively. DFD-like was not observed in the summer whilst in the winter season its occurrence was 0.9%. The distance of 15 and 57 km did not show any significant effect (p=0,7705) on the PSE occurrence during winter season. Also the highest PSE occurrence was observed at the lorry rear location because of highest locally temperature value. The distance of 55 km presented significatively (p=0,0002) the highest PSE occurrence of 57.0% during summer season. Also the lorry middle and rear locations promoted higher PSE occurrence because of locally higher temperature and lower ventilation. Finally, the watering application whilst in the farm was an important factor since there were approximately 7.0% less PSE
occurrence in treated birds? samples.
27
Aktop, Onur. "Optimization Of Doppler Processing By Using Bank Of Matched Filters." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/12606420/index.pdf.
Full textAbstract:
In radars, matched filters are used in the receiver of the system. Since the target velocity is not known a priori, degradation occurs due to mismatch of the return signal and the matched filter. The performance of the radar can be improved by using a bank of matched filters. The first topic investigated in this work is optimization of the bank of matched filter structure. Two methods are proposed for the design of the parallel filter structure and computations are performed with both methods.
The output signal of a radar receiver filter consists not only of the main peak from the target but also of range sidelobes. In a multi-target radar environment, the sidelobes of one large target may appear as a smaller target at another range, or the integrated sidelobes from targets or clutter may mask all the information of another target. The second part of this thesis discusses the methods for decreasing the sidelobe level of the receiver output. Two methods are studied for this purpose. The first is the classical amplitude weighting and the second is the use of an inverse filter that minimizes total sidelobe energy. Both methods decrease the sidelobe levels while bringing a mismatch loss and main peak broadening. For the inverse filter case it is observed that the effect of inverse filter becomes evident as the filter length is increased beyond some point.
Finally, the effects of quantization on video signal and the receiver filter coefficients are evaluated. It is observed that 16 bits quantization is sufficient for all kinds of receiver filters tested.
28
Hernandes, Bruna Molina. "A inversão do ônus da prova nas ações de alimentos: baseada na teoria geral de inversão do ônus da prova extraível do Código de Defesa do Consumidor e nos princípios constitucionais." Pontifícia Universidade Católica de São Paulo, 2012. https://tede2.pucsp.br/handle/handle/5819.
Full textAbstract:
Made available in DSpace on 2016-04-26T20:20:52Z (GMT). No. of bitstreams: 1
Bruna Molina Hernandes.pdf: 1492039 bytes, checksum: a84304578affc427cfdfbcd53d058bf6 (MD5)
Previous issue date: 2012-05-21<br>The present study has the aim of analyzing the possibility of reverting proving obligations in food related claims in the current legal system based on the study of constitutional principles and the similarities existed between factual and juridical situations involving consumers and furnishers taken from the Consumer Code in order to collect elements to formulate a theory for reverting prove obligation in food related claims.
Firstly, it will be briefly studied important aspects of the general theory of prove, such as the concept and finality of prove, its object, the principles it involves, passing through the analysis of indications, costumes and presumptions around the theme. After that, it will be studied the legal concept of food, its general notion, characteristics and procedural rites.
Finally, entering more specifically the theme of the study, there will be treated the revertion of prove obligations in general, the applicable theories, beside the study of the Consumer Code in order to analyze the possibility of inverting prove obligations in food related claims combined with the analysis of the applicable principles, the similarities existed between consumer and feeding in terms of rights and other characteristics. The study will be concluded by the presentation of the procedure to be applied for reverting proving obligations in food related claims<br>O presente trabalho tem como objetivo o estudo da possibilidade de inversão dos ônus probatórios nas ações de alimentos diante do ordenamento jurídico atual, baseando-se nos princípios constitucionais e nas semelhanças existentes entre as situações de fato e de direito entre fornecedores e consumidores abarcadas pelo Código de Defesa do Consumidor para formulação da teoria de inversão do ônus da prova.
Primeiramente, estudaremos, resumidamente, aspectos importantes da teoria geral da prova, como o conceito e finalidade da prova, seu objeto, além de princípios a ela relativos, passando pela análise dos indícios, máximas de experiência e presunções.
Após, estudaremos os alimentos, noções gerais, características, rito procedimental, entre outros.
Por fim, ingressando no tema do presente trabalho, trataremos da inversão do ônus da prova em geral, teorias aplicáveis, além do estudo do Código de Defesa do Consumidor, para depois ingressarmos na análise da inversão dos ônus probatórios nas ações de alimentos, com o exame de princípios aplicáveis, das semelhanças existentes entre os direitos e características do alimentando e do consumidor, finalizando com a apresentação do procedimento para a inversão defendida
29
Djoudi, Adel. "Binary level static analysis." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX093.
Full textAbstract:
Les méthodes de vérification automatique des logiciels connaissent un succès croissant depuis le début des années 2000, suite à plusieurs succès industriels (Microsoft, Airbus, etc.). L'analyse statique vise, à partir d'une description du programme, à inférer automatiquement des propriétés vérifiées par celui-ci. Les techniques standards d'analyse statique travaillent sur le code source du logiciel, écrit par exemple en C ou Java. Cependant, avoir accès au code source n'est pas envisageable pour de nombreuses applications relatives à la sécurité, soit que le code source n'est pas disponible (code mobile, virus informatiques), soit que le développeur ne veut pas le divulguer (composants sur étagère, certification par un tiers).Nous nous intéressons dans cette thèse à la conception et au développement d'une plate-forme d'analyse statique de code binaire à des fins d'analyse de sécurité. Nos principales contributions se font à trois niveaux: sémantique, implémentation et analyse statique.Tout d'abord, la sémantique des programmes binaires analysés est basée sur un formalisme générique appelé DBA qui a été enrichi avec des mécanismes de spécification et d'abstraction. La définition de la sémantique des programmes binaires requiert aussi un modèle mémoire adéquat.Nous proposons un modèle mémoire adapté au binaire, inspiré des travaux récents sur le code C bas-niveau. Ce nouveau modèle permet de profiter de l'abstraction du modèle à régions tout en gardant l'expressivité du modèle plat.Ensuite, notre plate-forme d'analyse de code binaire nommée BinSec offre trois services de base: désassemblage, simulation et analyse statique.Chaque instruction machine est traduite vers un bloc d'instructions DBA avec une sémantique équivalente. Une large partie des instructions x86 est gérée par la plateforme. Une passe de simplification permet d'éliminer les calculs intermédiaires inutiles afin d'optimiser le fonctionnement des analyses ultérieures. Nos simplifications permettent notamment d'éliminer jusqu'à75% des mises à jours de flags.Enfin, nous avons développé un moteur d'analyse statique de programmes binaires basé sur l'interprétation abstraite. Outre des domaines adaptés aux spécificités du code binaire, nous nous sommes concentrés sur le contrôle par l'utilisateur du compromis entre précision/correction et efficacité. De plus, nous proposons une approche originale de reconstruction de conditions dehaut-niveau à partir des conditions bas-niveau afin de gagner plus de précision d'analyse. L'approche est sûre, efficace, indépendante de la plateforme cibleet peut atteindre des taux de reconstruction très élevés<br>Automatic software verification methods have seen increasing success since the early 2000s, thanks to several industrial successes (Microsoft, Airbus, etc.).Static program analysis aims to automatically infer verified properties of programs, based on their descriptions. The standard static analysis techniques apply on the software source code, written for instance in C or Java. However, access to source code is not possible for many safety-related applications, whether the source code is not available (mobile code, computer virus), or the developer does not disclose it (shelf components, third party certification).We are interested in this dissertation in design and development of a static binary analysis platform for safety analysis. Our contributions are made at three levels: semantics, implementation and static analysis.First, the semantics of analyzed binary programs is based on a generic, simple and concise formalism called DBA. It is extended with some specification and abstraction mechanisms in this dissertation. A well defined semantics of binary programs requires also an adequate memory model. We propose a new memory model adapted to binary level requirements and inspired from recent work on low-level C. This new model allows to enjoy the abstraction of the region-based memory model while keeping the expressiveness of the flat model.Second, our binary code analysis platform BinSec offers three basic services:disassembly, simulation and static analysis. Each machine instruction is translated into a block of semantically equivalent DBA instructions. The platform handles a large part of x86 instructions. A simplification step eliminates useless intermediate calculations in order to ease further analyses. Our simplifications especially allow to eliminate up to 75% of flag updates.Finally, we developed a static analysis engine for binary programs based on abstract interpretation. Besides abstract domains specifically adapted to binary analysis, we focused on the user control of trade offs between accuracy/correctness and efficiency. In addition, we offer an original approach for high-level conditions recovery from low-level conditions in order to enhance analysis precision. The approach is sound, efficient, platform-independent and it achieves very high ratio of recovery
30
Saad, Sandra Isay. "Modelagem e valoração dos serviços ambientais hidrológicos na recuperação da vegetação no Ribeirão das Posses, Extrema, MG." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/106/106132/tde-23032018-155045/.
Full textAbstract:
Questões ambientais e sócio-econômicas nem sempre coexistem de forma conciliada, o que pode opor a conservação da biodiversidade, a regulação climática, a produção e qua¬li¬da¬de da água, com outros fatores como a produção de energia, alimentos e fibras, e a geração de empregos. No Brasil, o código florestal prescreve as Áreas de Preservação Permanente como forma de garantir a manutenção dos Serviços Ambientais (SA), e os projetos de Pagamento de Serviços Ambientais (PSA) estão surgindo como forma de recompensar os provedores de SA, como o Projeto Conservador das Águas, a primeira experiência municipal brasileira, em andamento no Município de Extrema, MG. Apesar dos esforços, ainda são escassos os estudos que quantifiquem os benefícios econômicos dos serviços ambientais, fundamental para que estes sejam incluídos nas tomadas de decisões. O objetivo do trabalho foi quantificar e valorar os Serviços Ambientais hidrológicos da recuperação da vegetação, na sub-bacia do Ribeirão das Posses, em Extrema, através da modelagem ambiental. Utilizando o modelo InVEST (Integrated Valuation of Environmental Services and Tradeoffs) foram simuladas a vazão e o fluxo de sedimentos em um cenário anterior e posterior ao Projeto Conservador das Águas, um cenário sem práticas de conservação (Antropizado), e em cenários que priorizassem o reflorestamento ao longo das margens dos rios (reflorestamento ripário) ou nas encostas (reflorestamento das áreas íngremes). Os Serviços Ambientais foram estimados a partir do custo evitado da redução do tratamento de água e dragagem (custos off-site) e na erosão (custos on-site), em função da diferença entre os cenários, e foram comparados com o Pagamento por Serviços Ambientais e o custo de oportunidade, equivalente aos rendimentos da pecuária extensiva. Verificou-se que as estradas geraram 29% da perda de solos na sub-bacia, e as barraginhas, uma das práticas conservacionistas adotadas pelo projeto, diminuíram em 4% os sedimentos na foz da sub-bacia, e o reflorestamento de espécies nativas em 5%. Juntas, as duas práticas contribuíram para 9% de redução. A redução do fluxo de sedimentos do Pós-Projeto em relação ao cenário Antropizado foi de 40%. O reflorestamento ripário foi mais eficiente na redução de fluxo de sedimentos do que o reflorestamento das áreas íngremes e gerou maior redução nos custos de tratamento de água e de dragagem. Enquanto um reflorestamento ripário de apenas 5 m reduziu em 23% o fluxo de sedimentos, um reflorestamento nas áreas íngremes com a mesma área de floresta (áreas com declividade acima de 60%) reduziu o fluxo de sedimentos em 2%. Para um reflorestamento ripário de 30 m, o mesmo foi reduzido em 50%. Por outro lado, o reflorestamento das áreas íngremes foi mais eficiente na redução da perda de solos, e portanto, obteve maior redução dos custos on-site, pela redução dos prejuízos causados pela erosão. Os resultados mostram a importância de projetos como o Conservador das Águas, não só na melhoria das condições ambientais, mas principalmente na conservação de florestas nativas. Os pequenos agricultores são uns dos principais beneficiários devido à melhoria das condições sociais e ambientais, embora não sejam os únicos, uma vez que os benefícios vão além dos limites da sub-bacia, e acreditamos que os esforços para a preservação devem ser com¬par¬ti¬lha-dos pelos beneficiários indiretos, que no caso da sub-bacia do Ribeirão das Posses, seriam os usuários da água do Sistema Cantareira. A nossa sugestão para esta contribuição é de pelo menos 28% do Pagamento por Serviços Ambientais por área preservada.<br>Environmental and socioeconomic issues not always coexist in a reconciled manner, which may oppose biodiversity conservation, climate regulation, water quality and production, to other factors such as energy production, food and fiber, and job creation. In Brazil, the Forest Code prescribes the Permanent Preservation Areas in order to guarantee the maintenance of Environmental Services (ES), and the Payment for Environmental Services project (PES) are emerging as a way to reward the providers of ES, as Conservador das Águas project, the first Brazilian municipal initiative, underway in Extrema Municipality. Despite the efforts, there are few studies that quantify the economic benefits of ecosystem services essential for them to be part of decision-making process. The objective of this work was to quantify and assess the hydrological Environmental Services in the recovery of vegetation in Posses subbasin in Extrema, through environmental modeling. Using InVEST model (Integrated Valuation of Environmental Services and Tradeoffs) we simulated sediment and streamflow in a scenario before Conservador das Águas project (Pre-Project), after (Post-Project), another with no soil conservation practices (Anthropized), and others which prioritize reforestation of riparian areas (riparian reforestation) or in slopes (reforestation of steep areas). The Environmental Services were estimated based on the avoided cost of reducing water treatment and dredging (off-site costs) and erosion (on-site costs), as functions of the difference between scenarios, and they were compared to the Payment for Environmental Services and the opportunity cost, equivalent to the extensive livestock income. It was found that the roads contributed to 29% of the total soil loss in the subbasin, and barraginhas, one of the conservation practices adopted by the project, decreased sediment flow in the river mouth by 4%, and reforestation of native species by 5%. Together, the two practices contributed to a reduction in 9%. The reduction of sediments flow in Post-Project scenario in relation to Anthropized was of 40%. Riparian reforestation was more efficient in the reduction of sediment flow than the reforestation of steep areas, what caused greater reduction in the costs of water treatment and dredging. While a 5 m riparian reforestation reduced sediment flow by 23%, reforestation in steep areas with the same area of forest (areas with slope above 60%) reduced sediment flow by 2%. For a 30 m of riparian strip of reforestation, it was reduced by 50%. On the other hand, reforestation of steep areas was more efficient in reducing soil loss, and so it presented greater reduction in on-site costs by reducing the losses caused by erosion. Results showed the importance of projects such as the Conservador das Águas, not only in the improvement of environmental conditions, but mainly in the conservation of native forests. The main beneficiaries of these projects are small farmers by improving social and environmental conditions, but the benefits go beyond the subbasin boundaries, and we believe that efforts to preserve must be shared by indirect beneficiaries, which in the case of Posses subbasin are the users of water from the Cantareira System. Our suggestion for this contribution is at least 28% of Payment for Environmental Services by preserved area.
31
Hablot, Jean-Michel. "Construction de solutions exactes en élastoplasticité. Application à l'estimation d'erreur par apprentissage." Phd thesis, Ecole Nationale des Ponts et Chaussées, 1990. http://tel.archives-ouvertes.fr/tel-00518462.
Full textAbstract:
Le calcul par éléments finis des structures en élastoplasticité classique conduit à des dépenses informatiques très élevées, sans qu'on puisse estimer de façon correcte les erreurs commises. Dans notre travail, nous proposons une nouvelle méthode d'estimation a priori des erreurs. Nous construisons d'abord les solutions exactes de problèmes mécaniques par une méthode inverse. Ensuite, nous utilisons ces solutions exactes pour évaluer l'erreur commise lors d'une analyse numérique, avec des discrétisations spatiale et temporelle données. Enfin, nous utilisons cette base d'exemples de deux manières: 1) la recherche de règles simples de remaillage quasi optimal; 2) la construction, par des techniques d'apprentissage automatique, de règles générales donnant a priori la discrétisation nécessaire pour respecter une erreur fixée.
32
Gonzalez, Miguel. "Nature and origin of sedimentary deposits in the Ecuador subduction trench : paleoseismological implications." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1B009/document.
Full textAbstract:
La sédimentation marine récente dans les fosses de subduction est caractérisée par l'interstratification de sédiments hémipélagiques et de turbidites localement intercalées avec les coulées de débris, qui peuvent résulter de la destabilisation des pentes continentales par de tremblements de terre. La marge d’Equateur est constituée par une forte érosion tectonique qui contribue à la formation d'une fosse profonde remplie d'une suite complexe de faciès sédimentaires. La sédimentation par écoulements gravitaires est omniprésente le long de la marge et les faciès vont de dépôts de transport de masse d'épaisseur métriques latéralement continus à des turbidites d'épaisseur centimétriques isolées intercalées avec des couches d'hémipélagites, de volcanoclastiques et de téphras. Nous présentons l'interprétation de la bathymétrie, des profils sismiques à haute résolution et des données pétrophysiques des carottes sédimentaires. L'objectif de cette étude est de décrire la complexité morphologique à la frontière équatorienne de la plaque de Nazca où un ensemble d'aspérités marines profondes ont subducté à différentes échelles, et ses conséquences sur la distribution latérale des sédiments dans les différents sous-bassins. La marge équatorienne comprend trois segments géomorphologiques: Le segment nord, situé au nord de la crête Carnegie, est caractérisé par une large (5-10 km) et profonde fosse (3800-4000 m), une pente continentale ravinée et une plate-forme (10-40 km de large) avec subsidence active. Le segment central en face de la crête de Carnégie montre une fosse étroite (0-5 km de large) et peu profonde (3100-3700 m), la pente escarpée et ravinée, sans canyons, et plateau continental étroit de 15 à 40 km de large caractérisé par des zones d'affaissement et de soulèvement actifs. Enfin, le segment sud, situé au sud de la crête Carnegie, présente une large (5-10 km) et profonde fosse (4000-4700 m), une pente continentale pauvre en sédiments avec des systèmes de canyons bien définis et une large plate-forme de subsidence (20-50 km). La dynamique sédimentaire le long de la marge est évaluée par l'analyse de 15 carottes sédimentaires dont la description visuelle, les photographies à haute résolution, l'imagerie par rayons X, les données XRF et les propriétés pétrophysiques conduisent à l'identification de 11 faciès sédimentaires caractérisant 7 processus sédimentaires: dépôts de turbidite, hémipélagites, téphras, dépôts de coulées de débris, homogénites, des slumps et des dépôts de carbonate de ooze. Les âges des dépôts sont définis par la datation au radiocarbone des sédiments hémipélagites. Les âges vont de 500 à 48000 ans BP. Les profils sismiques à haute résolution permettent de définir 3 echo-faciès: transparent, stratifiés et chaotiques. Le facies transparent est principalement associé aux dépôts d'homogénites, le facies stratifié est associé aux dépôts interstratifiés turbiditique-hémipélagique et le facies chaotique est associé à des dépôts gravitaires grossiers. Le remplissage de la fosse représente un enregistrement lacunaire mais important de l'histoire de la marge de subduction. De grandes coulées de débris se déplaçant vers l'est dans les deux séquences inférieures du remplissage de la fosse sont initiées le long de la paroi extérieure de la fosse, le long de grandes failles normales dues à la flexion de la plaque océanique subductante. Les sédiments de la séquence supérieure du remplissage qui nappent la fosse sont plus largement fournis par la paroi interne de la fosse mais avec un fort contrôle de la ride de Carnegie. En conséquence, la profondeur, la fréquence, l'épaisseur, la composition et la disposition latérale des dépôts sédimentaires varient grandement entre le nord et le sud. Les grands méga-lits simples, les slumps, les coulées de débris et les homogénites sont situés dans les segments nord et sud. Ils sont déclenchés par de grands escarpements de failles régionales, dans le Nord<br>Recent deep marine sedimentation in subduction trenches is characterized by the inter-stratification of hemipelagic and turbidite sediments locally interbedded with debris flow, which can result from continental slope shaking triggered by earthquakes. The active margin of Ecuador comprises tectonic erosion that contributes to the formation of a deep trench filled by a complex suite of sedimentary facies. Gravity flow sedimentation is ubiquitous along the margin and facies range from laterally continuous m-thick mass transport deposits to isolated cm-thick turbidites intercalated with hemipelagite, volcanoclastics and tephra. In this study we show interpretation of swath bathymetry, high-resolution seismic profiles and petrophysical data from cores. The objective is to describe the morphologic complexity on the Ecuadorian border of the Nazca plate where a set of deep marine asperities is subducting at different scales, and their consequences on the distribution of sediments in the different sub-basins. Ecuadorian margin comprises three geomorphological segments: The northern segment, northward of the Carnegie Ridge, is characterized by a wide (5-10 km) and deep trench (3800 – 4000 m), a gentler gullied continental slope and a shelf (10-40 km wide) with active subsidence. The central segment facing the Carnegie Ridge, is strongly influenced by the subduction of the Carnegie ridge which induces a narrow (0–5 km wide) and shallow trench (3100 – 3700 m depth), a steep and gullied slope with no canyons and a 15–40 km wide shelf characterized by areas with active subsidence and uplift. Finally, the southern segment, southward of the Carnegie Ridge, presents a wide (5–10 km) and deep (4000–4700 m) trench, a starved continental slope with well-defined canyon systems and a wide subsiding shelf (20–50 km). The sedimentary dynamics along the margin is evaluated by the analysis of 15 cores. Visual description, high-resolution photographs, X-Ray imagery, XRF data and petrophysical properties led to the identification of 11 sedimentary facies that characterize seven sedimentary processes: turbidites, hemipelagites, tephras, debris flows, homogenites, slumps, and ooze carbonate deposits. Age of the deposits is defined by radiocarbon age dating of hemipelagic sediments. Ages range from 500 to 48,000 years BP. High-resolution seismic profiles allow definition of three echo-facies: transparent, layered and chaotic. Transparent echo-facies is mainly associated to homogenite deposits, layered echo-facies is associated to the turbiditic-hemipelagic interbedded deposits and chaotic echo-facies is associated to reworked gravity flow deposits. The trench fill represents a lacunar but important record of the subduction margin history. Large eastward debris flows in the lower two sequences of the trench fill are provided by the trench outer wall as a results of slope failures along normal faults due to the downward bending of the oceanic plate. The sediment of the upper sequence of the trench fill draping the trench floor, are largely provided by the inner trench wall strongly controlled by the Carnegie Ridge. As a result, depth, frequency, thickness, composition and lateral disposition of the deposits vary greatly from those at north and south. The large, simple mega-beds like slump, debris flows and homogenites are located at the northern and southern segments. They were triggered by large regional faults in the North and enhanced by the activity of sets of splay faults in the South overhanging the seafloor at the slope toe. Small-size, fluid rich events were triggered by subduction of isolated seamounts at the edges of the Carnegie Ridge due to frequent but small destabilizations of an inner trench wall preconditioned by the impacts of successive seamounts. Sets of partly volcanoclastic turbidites in central segment might have been triggered by the complex interaction of slope and continental shelf deformation by seamount subduction
33
Žůrek, Tomáš. "Řízení trojfázového sinusového zdroje." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220914.
Full textAbstract:
This thesis deals with control of three phase inverter as three phase sinusoidal voltage source for UPS application. Thesis is split to two parts, teoretical and practical. Teoretical part deals with three phase inverter topology analysis according requirement of neutral line wire and possibilities of generating sinusoidal PWM in depend of topology. There are also analysed properties of contorled system and designed 3 regulation methods with simulations. Second part of thesis deals with realisation of sinusoidal power source with inverter borrowed by Elcom company. To inverter control is used digital signal controler TMS320F28335 with implemented control algorithms. There are also presented the measurement results of the prototype of power source. In conclusion, simulation results are compared with measurements and achieved results are summarized.
34
Wang, Jyh-Wei, and 王志雄. "The VLSI Design for Discrete Wavelet Transform and Inverse Discrete Wavelet Transform using Embedded Instruction Codes." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/06910225125080712632.
Full textAbstract:
碩士<br>國立交通大學<br>電機與控制工程系<br>89<br>The discrete wavelet transform (DWT) technique has been widely used in signal processing and image processing. Since the DWT coefficients have the property of energy conservation in the low frequency part, it is suitable for data compression. In the recent industry standard, DWT has replaced DCT which is a main approach in image compression in JPEG2000 and MPEG4. However, there are difficulties in implementation such as the heavy computation and complex operation procedures.
Due to the drawback, the thesis purposes a design rule named “Embedded Instruction Code (EIC)”, as well as focus on the hardware architectures of 1-stage 1 dimension DWT, multi-stage 1 dimension DWT and Multi-stage 2 dimension DWT. Based on this rule, DWT and inverse discrete wavelet transform (IDWT) can be integrated easily. Furthermore we can use the module design concept to implement DWT by different hardware architectures.
Using EIC, we can translate the computation of DWT and IDWT into the instruction codes of ALU. Moreover, the ALU architecture of 1-stage DWT is worked out by three different architectures. Besides, accompanied with “Recursive Pyramid Algorithm (RPA)” the EIC can be adopted in multi-stage 1 dimension DWT and multi-stage 2 dimension DWT.
Consequently, the gate level simulation and P&R are done with Synopsys and Cadence tools. The chip has excellent advantages in the ability of image processing, execution time and chip area.
35
Leu, Yah-Cheng, and 呂亞正. "A Fast Algorithm for Computing Inverses in GF(2m) and Its Application in Error Control Codes." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/93607214814130539727.
Full textAbstract:
碩士<br>中正理工學院<br>電子工程研究所<br>83<br>This thesis, develipes a fast alsgroitm for computing inverses in GF (2**m) using the normal basis of the field. The fast algorithm requires (q+p-1) muitiplions; where q=Int (log 2 (m-1)) and p is the number of 1's in the binary expression of (m-1). Therefore, the computing complexity is O (mlog-2(m)). The operatiou of the new algorithm is regular. simple, modular hence it is well-suited for VLSI implementation.
Generally, in the procedures of encoding and decodig in error control code, data are represented using conventional basis. However. computing inverses are required in most of decoding procedures of algebraic codes. Therefore, conventional encoding and decoding methods have the following drawbacks: (1) computing invcrses using conventional basis are complexity; or (2) basis transforms are required before and after each inverse computation. lu this thesis. we claim that the decoding computaton can be simplied if all data are represented by normal basis in the procedures of algebraic encoding and decoding. The new idea has been proved by means of computer simulation.
36
"O problema inverso da fase : teoria e algoritmos." Tese, Biblioteca Digital da Unicamp, 2003. http://libdigi.unicamp.br/document/?code=vtls000313892.
Full text
37
"Identificação de parametros estruturais com emprego de analise inversa." Tese, Biblioteca Digital da Unicamp, 2006. http://libdigi.unicamp.br/document/?code=vtls000399342.
Full text
38
"Metodo de atualização multi-coluna inverso para sistemas não-lineares." Tese, Biblioteca Digital da Unicamp, 2002. http://libdigi.unicamp.br/document/?code=vtls000255870.
Full text
39
"Analises numerica, analitica e experimental da macrossegregação inversa na solidificação." Tese, Biblioteca Digital da Unicamp, 2004. http://libdigi.unicamp.br/document/?code=vtls000349314.
Full text
40
"Contribuição ao estudo da concentração de extrato de cafe por osmose inversa." Tese, Biblioteca Digital da Unicamp, 2001. http://libdigi.unicamp.br/document/?code=vtls000085343.
Full text
41
"A relação inversa entre o preço e a dimensão das propriedade rurais em mercados especificos." Tese, Biblioteca Digital da Unicamp, 2004. http://libdigi.unicamp.br/document/?code=vtls000358208.
Full text
42
Wang, I.-Hsiang Su, and 蘇王奕翔. "ICQ-Tree: An Inverted Code Quadtree for the Top-K Spatial Keyword Query over the Incremental Database." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9m98gv.
Full textAbstract:
碩士<br>國立中山大學<br>資訊工程學系研究所<br>106<br>With the rapid development of geo-spatial data, the use of spatial databases has become more and more widespread. For example, if we enter the keyword ‘restaurant’ on Google Map, the system will display a number of restaurants near you, or upload photos with the location information in Instagram and uses hashtags to classify photos. The application of the geographic information has brought a lot of convenience and interests to our life. As the number of spatial objects and keyword objects increases, the data storage and the search efficiency become more important. A spatial keyword query consists of the spatial information and the textual information. Spatial information can be expressed as a point, a line, or the shape on a map; a keyword is the description or the user’s comment. In the space, for querying the top-k objects that match the keyword conditions, it is called the top-k spatial keyword query. Zhang et al. propose a data structure called the IL-Quadtree which combines the inverted index and the linear quadtree for reducing the storage size effectively. In order to further improve the efficiency of the top-k spatial keyword query algorithms, they propose a signature filtering technique. During the query process, it checks the signature to verify whether the node is a candidate node or not. This will reduce the times of traces around nodes. However, in their approach, a large number of quadtrees must be built to store data of objects. For n keywords, it creates n trees. When performing a signature check, each IL-Quadtree must be cross-checked. This will take long time to process the data. Therefore, in this thesis, we propose the ICQ-tree algorithm. Our ICQ-tree combines the quadtree and the inverted code that we have improved from the inverted index. The contribution of our approach is as follows. First, we only construct an ICQ-tree to store data, instead of building n quadtrees for the n keywords in the database. Second, each node of the ICQ-tree records the non-repetitive location, and each object is recorded only once. Finally, we enhance each node in the ICQ-tree with the inverted code. We can prune a node and all of its child nodes immediately, once we know that one of the query keywords is definitely not in the node. From our simulation results, we show that our proposed approach is more efficient than the IL-Quadtree algorithm.
43
Harmany, Zachary Taylor. "Computational Optical Imaging Systems: Sensing Strategies, Optimization Methods, and Performance Bounds." Diss., 2012. http://hdl.handle.net/10161/6135.
Full textAbstract:
<p>The emerging theory of compressed sensing has been nothing short of a revolution in signal processing, challenging some of the longest-held ideas in signal processing and leading to the development of exciting new ways to capture and reconstruct signals and images. Although the theoretical promises of compressed sensing are manifold, its implementation in many practical applications has lagged behind the associated theoretical development. Our goal is to elevate compressed sensing from an interesting theoretical discussion to a feasible alternative to conventional imaging, a significant challenge and an exciting topic for research in signal processing. When applied to imaging, compressed sensing can be thought of as a particular case of computational imaging, which unites the design of both the sensing and reconstruction of images under one design paradigm. Computational imaging tightly fuses modeling of scene content, imaging hardware design, and the subsequent reconstruction algorithms used to recover the images. </p><p>This thesis makes important contributions to each of these three areas through two primary research directions. The first direction primarily attacks the challenges associated with designing practical imaging systems that implement incoherent measurements. Our proposed snapshot imaging architecture using compressive coded aperture imaging devices can be practically implemented, and comes equipped with theoretical recovery guarantees. It is also straightforward to extend these ideas to a video setting where careful modeling of the scene can allow for joint spatio-temporal compressive sensing. The second direction develops a host of new computational tools for photon-limited inverse problems. These situations arise with increasing frequency in modern imaging applications as we seek to drive down image acquisition times, limit excitation powers, or deliver less radiation to a patient. By an accurate statistical characterization of the measurement process in optical systems, including the inherent Poisson noise associated with photon detection, our class of algorithms is able to deliver high-fidelity images with a fraction of the required scan time, as well as enable novel methods for tissue quantification from intraoperative microendoscopy data. In short, the contributions of this dissertation are diverse, further the state-of-the-art in computational imaging, elevate compressed sensing from an interesting theory to a practical imaging methodology, and allow for effective image recovery in light-starved applications.</p><br>Dissertation
44
"Invertase acida, sacarose sintase e o metabolismo de açucares no desenvolvimento da semente de cafe (Coffea arabica L. )." Tese, Biblioteca Digital da Unicamp, 2004. http://libdigi.unicamp.br/document/?code=vtls000321930.
Full text
45
"Estudo de regime de luz nas quatro principais formações fitogeograficas no estado de São Paulo durante o inverno do ano de 2003." Tese, Biblioteca Digital da Unicamp, 2004. http://libdigi.unicamp.br/document/?code=vtls000321721.
Full text
46
"Formulação e implementação da versão direta do metodo dos elementos de contorno para tratamento de problemas acusticos estacionarios bidimensionais diretos e inversos." Tese, Biblioteca Digital da Unicamp, 2004. http://libdigi.unicamp.br/document/?code=vtls000342772.
Full text
47
(10942896), Soumendu Majee. "HIGH SPEED IMAGING VIA ADVANCED MODELING." Thesis, 2021.
Find full textAbstract:
<div>There is an increasing need to accurately image objects at a high temporal resolution for different applications in order to analyze the underlying physical, chemical, or biological processes. In this thesis, we use advanced models exploiting the image structure and the measurement process in order to achieve an improved temporal resolution. The thesis is divided into three chapters, each corresponding to a different imaging application.</div><div><br></div><div>In the first chapter, we propose a novel method to localize neurons in fluorescence microscopy images. Accurate localization of neurons enables us to scan only the neuron locations instead of the full brain volume and thus improve the temporal resolution of neuron activity monitoring. We formulate the neuron localization problem as an inverse problem where we reconstruct an image that encodes the location of the neuron centers. The sparsity of the neuron centers serves as a prior model, while the forward model comprises of shape models estimated from training data.</div><div><br></div><div>In the second chapter, we introduce multi-slice fusion, a novel framework to incorporate advanced prior models for inverse problems spanning many dimensions such as 4D computed tomography (CT) reconstruction. State of the art 4D reconstruction methods use model based iterative reconstruction (MBIR), but it depends critically on the quality of the prior modeling. Incorporating deep convolutional neural networks (CNNs) in the 4D reconstruction problem is difficult due to computational difficulties and lack of high-dimensional training data. Multi-Slice Fusion integrates the tomographic forward model with multiple low dimensional CNN denoisers along different planes to produce a 4D regularized reconstruction. The improved regularization in multi-slice fusion allows each time-frame to be reconstructed from fewer measurements, resulting in an improved temporal resolution in the reconstruction. Experimental results on sparse-view and limited-angle CT data demonstrate that Multi-Slice Fusion can substantially improve the quality of reconstructions relative to traditional methods, while also being practical to implement and train.</div><div><br></div><div>In the final chapter, we introduce CodEx, a synergistic combination of coded acquisition and a non-convex Bayesian reconstruction for improving acquisition speed in computed tomography (CT). In an ideal ``step-and-shoot'' tomographic acquisition, the object is rotated to each desired angle, and the view is taken. However, step-and-shoot acquisition is slow and can waste photons, so in practice the object typically rotates continuously in time, leading to views that are blurry. This blur can then result in reconstructions with severe motion artifacts. CodEx works by encoding the acquisition with a known binary code that the reconstruction algorithm then inverts. The CodEx reconstruction method uses the alternating direction method of multipliers (ADMM) to split the inverse problem into iterative deblurring and reconstruction sub-problems, making reconstruction practical. CodEx allows for a fast data acquisition leading to a good temporal resolution in the reconstruction.</div>
48
Darlindo, Rui. "A quebra da instrumentalidade dos procedimentos cautelares." Master's thesis, 2013. http://hdl.handle.net/11328/1047.
Full textAbstract:
Dissertação de Mestrado em Direito<br>Com o presente trabalho pretende-se abordar e analisar a importante alteração
dogmática verificada no âmbito dos procedimentos cautelares com a entrada em vigor
do NCPC.
Usualmente, os procedimentos cautelares eram vistos como um meio puramente
instrumental, existindo para garantir o fim de um outro processo (o processo definitivo).
Contudo, ao longo do tempo, verificou-se que o legislador optou pela consagração de determinados regimes legais que alteraram essa visão típica dos procedimentos cautelares.
Com a entrada em vigor do NCPC e com a previsão do regime da inversão do
contencioso, verificou-se uma importante derrogação ao princípio que, durante longos
anos, marcou o sistema cautelar Português: o princípio segundo o qual os
procedimentos cautelares eram sempre dependentes de uma acção principal.
O regime da inversão do contencioso, previsto no artigo 369.º do NCPC, confere
à providência cautelar decretada a susceptibilidade de resolver definitivamente o litígio,
sendo certo que a não instauração da acção principal irá converter essa providência
cautelar em definitiva. Contudo, o decretamento da inversão do contencioso é apenas possível em determinado tipo de providências cautelares e quando estejam reunidos certos requisitos, será, por exemplo, necessário que o juiz forme convicção segura acerca da existência do direito acautelado.
Com tal solução, verifica-se que a típica provisoriedade das providências
cautelares e a necessidade de existência da acção principal deixam de ser características absolutas da tutela cautelar, o que constitui uma enorme novidade no nosso direito processual civil.
Verifica-se, assim, que o NCPC prevê uma dupla instrumentalidade no âmbito
dos procedimentos cautelares: a instrumentalidade necessária, existente quando não seja invertido o contencioso, e a instrumentalidade eventual, existente quando seja invertido o contencioso. Deste modo, podemos afirmar que existe uma verdadeira quebra da
instrumentalidade no âmbito dos procedimentos cautelares com a consagração do regime da inversão do contencioso.<br>With this dissertation we intend to analyze the important dogmatic alteration
observed in the precautionary proceedings of the new Code of Civil Procedure from
2013.
Usually, the precautionary proceedings were seen as a purely instrumental mean
that exist to ensure the purpose of another process (the main process). However, in the
course of time, we realized that the lawmaker decided to recognize certain statutory
schemes that modified this typical view of precautionary procedures.
With the Code of Civil Procedure from 2013 and the legal regime of the article
369.º there was an important derogation to the principle that, for many years, marked
the Portuguese system whereby the precautionary proceedings were always dependent
of the main process.
The legal regime of the article 369.º from the Portuguese Code of Civil
Procedure gives the injunctions the possibility to definitively settle the litigation.
However, this legal regime can only be applied in some types of precautionary
proceedings and only when some requirements are met, for example, it is required that
the judge has a strong conviction about the existence of the right in dispute.
With this solution, we verify that the temporariness of the precautionary
proceedings and the need of the existence of the main process are no longer absolute
characteristics of precautionary proceedings, which is a huge innovation in the
Portuguese civil procedural law.
Therefore, it seems that the new Portuguese Code of Civil Procedure provides a
dual instrumentality in precautionary proceedings: an essential instrumentality, that
exists when the litigation is not inverted; and an occasional instrumentality, when we
have the regime of the article 369.º.
Thus, we can assert that there is a real breaking of the instrumentality in
precautionary proceedings due to the recognition of the regime of the article 369.º.<br>Orientação: Professor Doutor J.P Remédio Marques e Mestre Paulo Pimenta.