Academic literature on the topic 'Codice 1D'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Codice 1D.'
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.
Journal articles on the topic "Codice 1D"
1
Ferentinos, V., B. Geelen, G. Lafruit, et al. "Optimized memory requirements for wavelet-based scalable multimedia codecs." Journal of Embedded Computing 1, no. 3 (2005): 363–80. https://doi.org/10.3233/emc-2005-00039.
Full textAbstract:
Powerful multimedia applications are running more and more on very compact and resource-scarce, portable systems. As a consequence, system design optimization, its associated time-to-market constraints and the required automated tool support are becoming increasingly important issues, especially in situations where product derivatives and extensions introduce unforeseen and possibly dramatic constraints in the system optimization process. Nevertheless, the system designer remains an irreplaceable cornerstone for steering the whole system optimization process. This paper presents the relationship of aforementioned aspects in the context of optimizing data access to memory, which is the dominant factor determining the system-on-a-chip area, data throughput and power consumption. The case study of a 1D and 2D forward and inverse wavelet transform, interacting with surrounding system modules imposed by current multimedia compression standards, leads the reader through the peculiar technical counter-measures and script-based optimization steps to be followed for reaching a satisfactory global optimization. In particular, the data dependencies between the different functional modules are shown to be crucial in the memory optimization process and lead to non-trivial/counter-intuitive decision takings that can increase the energy consumption gains compared to more commonly-accepted, though suboptimal approaches. An example is the counter-intuitive observation that though JPEG2000 uses independently entropy coded blocks over its wavelet subbands, it requires more memory because of “hidden” data dependencies, than its zero-tree based MPEG-4 counterpart, whose intricate entropy coding spreads over all the subbands. Hence, to achieve an overall optimal implementation with good trade-offs between efficiency and cost, it is strongly suggested that algorithmic and implementation designers should co-operate in early stages of the multimedia systems design, facilitated by high-level memory cost estimation analyses.
2
Matem, Rima, S. A. Aljunid, M. N. Junita, C. B.M Rashidi, and Israa Shihab Aqrab. "Performance analysis of spectral/spatial of OCDMA system using 2D hybrid ZCC/MD code." Indonesian Journal of Electrical Engineering and Computer Science 13, no. 2 (2020): 569–74. https://doi.org/10.11591/ijeecs.v13.i2.pp569-574.
Full textAbstract:
This paper proposes a new spectral/spatial code for Spectral Amplitude Coding in Optical Coding Division Multiple Access (SAC-OCDMA) called two-Dimensional hybrid ZCC/MD code. The new code combines two of the one –dimensional codes which are Zero Cross Correlation (1D ZCC) and Multi-Diagonal code (1D MD). Moreover, it produces a zero cross correlation property for each code. The main goal of this proposed code is to mitigate Phase Induced Intensity Noise and eliminate Multiple Access Interference (MAI). This proposed code can provide a better performance comparing to other codes as 2D FCC/MDW and 2D DPDC according to the obtained numerical analysis.
3
Anil, ChowdaryTummala, and Nalluri Purnachand. "Reduced encoder time complexityusing enhanced adaptive multiple transform selection in versatile video coding." Reduced encoder time complexityusing enhanced adaptive multiple transform selection in versatile video coding 32, no. 2 (2023): 796–803. https://doi.org/10.11591/ijeecs.v32.i2.pp796-803.
Full textAbstract:
When compressing a video, the architecture is provided with the width and height of the frame along with the video as input. The multiple transform selection (MTS) techniques are used to compress video. Traditional discrete cosine transforms (DCT)and other trigonometric (sine and cosine) transforms, such as DCT-8 and DST-7, are included in the pool of transforms. For the best outcomes, two additional transformsDST-2 and DCT-5were also utilized to compress any remaining video frames. To improve coding effectiveness, peak signal-to-noise ratio (PSNR), and delay, 2D transforms are broken into 1D directional transforms for block sizes ranging from 4×4 to 64×64. The temporal complexity was greatly decreased by adding DST-2 to the existing video test model (VTM). The MTS’s adaptive multiple transform(AMT)scheme already included a pool of transforms, but DST-2 was introduced as a fourth transform. Encoder time complexity was reduced by 22% on average without compromising PSNR and bitrate.
4
Kasperuk, Aleksandra, and Sławomir Krzysztof Zieliński. "Non-intrusive method for audio quality assessment of lossy-compressed music recordings using convolutional neural networks." International Journal of Electronics and Telecommunications, June 25, 2024, 331–39. http://dx.doi.org/10.24425/ijet.2024.149549.
Full textAbstract:
Most of the existing algorithms for the objective audio quality assessment are intrusive, as they require access both to an unimpaired reference recording and an evaluated signal. This feature excludes them from many practical applications. In this paper, we introduce a non-intrusive audio quality assessment method. The proposed method is intended to account for audio artefacts arising from the lossy compression of music signals. During its development, 250 high-quality uncompressed music recordings were collated. They were subsequently processed using the selection of five popular audio codecs, resulting in the repository of 13,000 audio excerpts representing various levels of audio quality. The proposed non-intrusive method was trained with the data obtained employing a well-established intrusive model (ViSQOL v3). Next, the performance of the trained model was evaluated utilizing the quality scores obtained in the subjective listening tests undertaken remotely over the Internet. The listening tests were carried out in compliance with the MUSHRA recommendation (ITU-R BS.1534-3). In this study, the following three convolutional neural networks were compared: (1) a model employing 1D convolutional filters, (2) an Inception-based model, and (3) a VGG-based model. The last-mentioned model outperformed the model employing 1D convolutional filters in terms of predicting the scores from the listening tests, reaching a correlation value of 0.893. The performance of the Inceptionbased model was similar to that of the VGG-based model. Moreover, the VGG-based model outperformed the method employing a stacked gated-recurrent-unit-based deep learning framework, recently introduced by Mumtaz et al. (2022).
5
Hao, Wang, and Zou Yanming. "2D Bar Codes Reading: Solutions for Camera Phones." June 28, 2007. https://doi.org/10.5281/zenodo.1060599.
Full textAbstract:
Two-dimensional (2D) bar codes were designed to carry significantly more data with higher information density and robustness than its 1D counterpart. Thanks to the popular combination of cameras and mobile phones, it will naturally bring great commercial value to use the camera phone for 2D bar code reading. This paper addresses the problem of specific 2D bar code design for mobile phones and introduces a low-level encoding method of matrix codes. At the same time, we propose an efficient scheme for 2D bar codes decoding, of which the effort is put on solutions of the difficulties introduced by low image quality that is very common in bar code images taken by a phone camera.
Dissertations / Theses on the topic "Codice 1D"
1
Santo, Luca. "AA-CAES physical modelling: integration of a 1D TES code and plant performance analysis." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-360448.
Full textAbstract:
The focus of this thesis work was the development of an approachto couple a previosly existing Thermal Energy Storage (TES) modelwritten in C++ with a Simulink/Simscape plant model to simulate anAdvanced Adiabatic Compressed Air Energy Storage (AA-CAES) plant.After the creation and validation of such tool, the complete modelwas used to run simulations, with the aim of assessing the AA-CAESplant's performance under multiple patterns of charge anddischarge.Most of the works found in the literature only provide values ofstorage efficiency obtained from analytical approaches, whilethose that use simulation tools provide average values ofefficiencies when the plant is performing a series of identicalcycles of charge and discharge. During this thesis project,instead, simulations were performed for consecutive irregularcycles determined as the plant response to the electric grid powerrequest. The average efficiency values obtained provide thereforea better representation of how the plant would perform in realapplications.The results show that, under the assumptions made, the AA-CAESplant's overall storage efficiency is influenced very weakly byalterations of the charge-discharge patterns, and that goodperformances can be expected not only for identical chargedischargeconsucutive cycles, but for any pattern that observesthe cavern pressure limits, as long as the thermal energy storageis sized wisely.In addition, a sensitivity analysis was performed in order toassess the influence of turbomachinery efficiency on overallstorage efficiency, for a specified plant layout. The results showthat the turbine efficiency is the most affecting parameter to theplant's performance, while the impact of the main compressors'sinefficiency is mitigated by the thermal recovery that takes placein the TES.The present work confirms that AA-CAES is a promising technologyand that storage efficiencies above 70% can be achieved even inrealistic production scenarios.Finally, future steps for more accurate simulations of plants'performances and more detailed energy production scenarios areproposed.MSc ET 18007Examinator: Joakim WidénÄmnesgranskare: Ane HåkanssonHandledare:
2
Ladeia, Cibele Aparecida. "Formulação semi-discreta aplicada as equações 1D de convenção-difusão-reação e de Burgers." Universidade Estadual de Londrina. Centro de Ciências Exatas. Programa de Pós-Graduação em Matemática Aplicada e Computacional, 2012. http://www.bibliotecadigital.uel.br/document/?code=vtls000171429.
Full textAbstract:
Neste trabalho aplicamos a formulação semi-discreta, caracterizada pela combinação de aproximações distintas para as variáveis temporal e espacial, onde a variável temporal é discretizada utilizando métodos implícitos multi-estágios e a espacial usando métodos de elementos finitos,para a obtenção de soluções numéricas para as equações 1D de convecção-difusão-reação e de Burgers, cujas soluções analíticas são conhecidas.Métodos multi-estágios são obtidos através dos aproximantes de Padé. Em particular, neste trabalho consideramos os métodos implícitos multi-estágios de segunda ordem, R11, e de quarta ordem, R22, na discretização temporal. Quanto à discretização espacial, utilizamos três formulações do método de elementos finitos, ou seja, mínimos quadrados (MEFMQ), Galerkin (MEFG) e streamline-upwind Petrov-Galerkin (SUPG). Apresentamos análises quanto à influência dos números de Péclet e de Courant-Friedrichs-Lewy, da influência da malha e dos aproximantes de Padé R11 e R22 nas formulações MEFMQ, MEFG e SUPG. Apresentamos uma análise do erro utilizando a norma L2, comparando as soluções numéricas com a solução analítica das equações avaliadas. Verificamos que o método implícito multi-estágio de quarta ordem, R22, quando adicionado aos MEFMQ, MEFG e SUPG aumentou a região de convergênciadas soluções numéricas das equações e que o MEFMQ apresentou uma melhor performance, quando comparado as formulações MEFG e SUPG.<br>In this work we apply the semidiscrete formulation, characterized by the combination of distinct approaches to the time and space variables, where the time variable is discretized using implicits multi-stages methods and space variable is discretized using finite element methods, for obtaning numerical solutions for the 1D convection-diffusion-reation and Burgers equations, whose analytical solutions are known. Multi-stage methods are obtained through of Padé approximants. In particular, in this work we consider of the implicit multi-stage method of second-order R11 and of fourth-order R22, for time discretization. As for space discretization, we use three formulations of the finite elements methods, namely, least square (LSFEM), Galerkin (GFEM) and streamline-upwind Petrov-Galerkin (SUPG). We present analysis of the influence of the Péclet and Courant-Friedrichs-Lewy numbers, of the influence of the grid, of the Padé approximants R11 and R22 in the formulations LSFEM, GFEM and SUPG. We present a analysis of the error using the L2-norm, comparing the numerical solutions with analytical solutions. We verify that of the implicit multi-stage method of second-order when combined with the LSFEM, GFEM and SUPG, increased region of convergence of the numerical solutions, and that LSFEM presented a better performace when compared to the GFEM and SUPG formulations.
3
Medeiros, Cláudia Brunosi. "Soluções das equações de Burgers 1D e 2D via : upwind de alta ordem e Hopf-Cole." Universidade Estadual de Londrina. Centro de Ciências Exatas. Programa de Pós-Graduação em Matemática Aplicada e Computacional, 2013. http://www.bibliotecadigital.uel.br/document/?code=vtls000183051.
Full textAbstract:
No estudo em dinâmica dos fluidos computacional há o interesse em obter soluções numéricas para as equações diferenciais parciais. Um desafio neste contexto é a formação de descontiniuidades que pode ser atribuída ao tratamento do termo convectivo não linear em equações diferenciais parciais. Dentro deste cenário, neste trabalho apresenta-se o estudo de um esquema upwind de alta resolução, o esquema ADBQUICKEST (Adaptative Bounded QUICKEST). Este esquema é aplicado em equações 1D e 2D, comparando qualitativemente os resultados numéricos com as soluções analíticas obtidas via transformação de Hopf-Cole e via uma modificação na transformação de Hopf-Cole. Ainda, o esquema é investigado nas soluções da equação de Burgers 1D e no sistema acoplado de equações de Burgers 1D para diferentes condições iniciais e de fronteira. Além disso, analisam-se os resultados numéricos da equação de Burgers 2D e os resultados no sistema acoplado de equações de Burgers 2D a baixos valores de _. Por fim, investiga-se a ordem de precisão do esquema ADBQUICKEST em cada exemplo estudado.<br>In the studies in computational fluid dynamics there is interest to obtain numerical solutions for partial differential equations. A challenge in this context is the formation of shock that can be attributed to the treatment of the nonlinear convective term in the partial differential equations. Within this scenario, this paper presents the study of a high-resolution upwind scheme, the ADBQUICKEST scheme. This scheme is applied to equation 1D and 2D, qualitatively comparing the numerical results with analytical solution obtained via Hopf-Cole transformation. Still, the scheme investigated in solutions of 1D Burgers equation and 1D coupled system of Burgers equations for different initial and boundary conditions. Furthermore, the numerical results of 2D Burgers equation and the numerical results of 2D coupled system of Burgers equations with low values of _ are analyzed. Ultimately, investigates the order of precision of the ADBQUICKEST in each example studied.
4
Douimi, Mohammed. "Modélisation markovienne et optimisation numérique pour la restauration des signaux en (1D) et (2D)." Rouen, 1995. http://www.theses.fr/1995ROUES039.
Full textAbstract:
Cette thèse est consacrée à la modélisation markovienne et l'optimisation numérique pour la restauration des signaux en (1D) et (2D) bruités par un bruit blanc gaussien centré. Le principe du modèle markovien exploite le champ de Markov et de Gibbs sur des graphes finis via le théorème d'Hammersley Clifford. Le signal restauré est estimé au sens du critère du maximum a posteriori (MAP), qui conduit à un problème d'optimisation globale mixte, non convexe et de très grande taille, réputé très difficile. Plusieurs méthodes ont été proposées notamment le recuit simulé (SA), le graduted non convexity (GNC) et le recuit par champ moyen (MFA) introduits respectivement par (GG84), (BLA87) et (GEI89). Nous proposons des variantes de GNC 1er et 2eme ordre et surtout un nouvel algorithme que nous appelons balayage par position de discontinuité (BPD). Ce nouvel algorithme s'inspire des méthodes de coupe énumérative en optimisation combinatoire. Il se démarque des autres algorithmes cités par sa nature parallélisable, sa rapidité et sa facilite pour le choix des paramètres de lissage et de sensibilité. Ainsi, par exemple, dans le cas du signal en (1D) un traitement assisté ou automatique est proposé selon le degré de connaissance du signal à restaurer. De plus la souplesse de l'algorithme BPD permet d'introduire d'autres types de fonctions d'énergie élargissant le champ des applications (applications contour-image).
5
Laroche, Guillaume. "Modules de codage par compétition et suppression de l'information de compétition pour le codage de séquences vidéo." Phd thesis, Télécom ParisTech, 2009. http://pastel.archives-ouvertes.fr/pastel-00005379.
Full textAbstract:
Cette thèse est dédiée à l'amélioration de la compression de séquences vidéo. Le but est de concevoir des méthodes suffisamment efficaces et réalistes pour être proposées aux organismes de normalisation de standard vidéo. Les approches choisies sont l'ajout de nouveaux modules de codage par compétition et la suppression de l'information de compétition. Un module de codage par compétition de prédicteurs de vecteurs mouvement, intégré dans le KTA, exploite, au sens du critère débit-distorsion, les redondances spatiales et temporelles des champs de vecteurs. De plus, une sélection automatique d'ensembles de prédicteurs orientée contenu est aussi proposée. Enfin, un nouveau mode de codage Intra basé sur un partitionnement 1D du macrobloc, réduisant la distance spatiale entre le signal de référence et la partition courante, est ajouté aux modes Intra bloc. Le standard de compression H.264/AVC, offre un nombre de compétitions plus élevé que celui de ses prédécesseurs. Pour réduire le débit lié à cette information de compétition, une partie de l'intelligence du codeur a été transférée au décodeur. Les indices des prédicteurs de vecteurs mouvement implicites, sont ainsi éliminés. Des prédicteurs Intra sont aussi supprimés en tenant compte du processus de quantification et du signal de référence. Enfin, en considérant que l'information de mouvement est une information de compétition, une estimation de mouvement au décodeur est mise en place. L'ensemble des méthodes développées offre des réductions de débit significatives par rapport à la référence. La combinaison d'une partie de ces méthodes obtient un gain moyen de 20% par rapport au standard pour un ensemble de séquences HD.
6
Khalifé, Maya. "Mesure de pression non-invasive par imagerie cardiovasculaire et modélisation unidimensionnelle de l’aorte." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112325/document.
Full textAbstract:
L'imagerie par Résonance Magnétique permet de mesurer l'écoulement sanguin. Au niveau cardiovasculaire, elle permet d'acquérir non seulement des images anatomiques du cœur et des gros vaisseaux mais aussi des images fonctionnelles de vitesse par contraste de phase. Cette technique offre des perspectives dans l'étude de la dynamique des fluides et dans la caractérisation des artères, en particulier pour les grosses artères systémiques comme l'aorte dont le rôle est primordial dans la circulation sanguine. Par ailleurs, l'un des paramètres qui entrent en jeu dans la détermination de la fonction cardiaque et du comportement vasculaire est la pression artérielle. La méthode de référence de la mesure de pression dans l'aorte étant le cathétérisme, plusieurs méthodes combinant la modélisation à l'imagerie ont été proposées afin d'estimer un gradient de pression de façon non invasive. Ce travail de thèse propose de mesurer la pression dans un segment d'aorte grâce à un modèle 1D simplifié et en utilisant les données mesurées par IRM et un modèle 0D représentant le réseau vasculaire périphérique comme conditions aux limites. Aussi, afin d'adapter le modèle à l'aorte du patient, une loi de pression exprimant une relation entre la section aortique à la pression et basée sur la compliance a été utilisée. Cette dernière, liée à la vitesse d'onde de pouls (VOP), a été mesurée en IRM sur les ondes de vitesse.Par ailleurs, les séquences de codage de vitesse et d'accélération sont longues et ponctuées d'artéfacts dus au mouvement du patient. Une apnée est requise afin de limiter le mouvement respiratoire. Cependant, la durée de l'apnée atteint 25 à 30 secondes pour de telles séquences, ce qui est souvent impossible à tenir pour les malades. Une technique d'optimisation de séquences dynamiques par réduction du champ de vue est proposée et étudiée. La technique décrit un dépliement des régions repliées par différence complexe de deux images, l'une codée et l'autre non codée en vitesse. Cette méthode réalise une réduction de plus de 25% de la durée d'apnée<br>Magnetic Resonance Imaging (MRI) is used to measure blood flow. It allows assessing not only dynamic images of the heart and the large arteries, but also functional velocity images by means of Phase Contrast. This promising technique is important for studying fluid dynamics and characterizing the arteries, especially the large systemic arteries that play a prominent role in the blood circulation. One of the parameters used for determining the cardiac function and the vascular behavior is the arterial pressure. The reference technique for measuring the aortic pressure is catheterism, but several methods combining imaging and mathematical modeling have been proposed in order to non-invasively estimate a pressure gradient. This work proposes to measure pressure in an aortic segment through a simplified 1D model using MRI measured flow and 0D model representing the peripheral vascular system as boundary conditions. To adapt the model to the aorta of a patient, a pressure law was used forming a relation between the aortic section area and pressure, based on compliance, which is linked to pulse wave velocity (PWV) estimated on MRI measured flow waves.Scan duration was optimized, as it is often a limitation during image acquisition. Velocity and acceleration sequences require a long time and may cause artifacts. Hence, they are acquired during apnea to avoid respiratory motion. However, for such acquisitions, a subject would have to hold their breath for more than 25 seconds which can pose difficulties for some patients. A technique that allows dynamic acquisition time optimization through field of view reduction was proposed and studied. The technique unfolds fold-over regions by complex difference of two images, one of which is motion encoded and the other acquired without an encoding gradient. By implementing this method, we decrease the acquisition time by more than 25%
7
Khalifé, Maya. "Mesure de pression non-invasive par imagerie cardiovasculaire et modélisation unidimensionnelle de l'aorte." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00998386.
Full textAbstract:
L'imagerie par Résonance Magnétique permet de mesurer l'écoulement sanguin. Au niveau cardiovasculaire, elle permet d'acquérir non seulement des images anatomiques du cœur et des gros vaisseaux mais aussi des images fonctionnelles de vitesse par contraste de phase. Cette technique offre des perspectives dans l'étude de la dynamique des fluides et dans la caractérisation des artères, en particulier pour les grosses artères systémiques comme l'aorte dont le rôle est primordial dans la circulation sanguine. Par ailleurs, l'un des paramètres qui entrent en jeu dans la détermination de la fonction cardiaque et du comportement vasculaire est la pression artérielle. La méthode de référence de la mesure de pression dans l'aorte étant le cathétérisme, plusieurs méthodes combinant la modélisation à l'imagerie ont été proposées afin d'estimer un gradient de pression de façon non invasive. Ce travail de thèse propose de mesurer la pression dans un segment d'aorte grâce à un modèle 1D simplifié et en utilisant les données mesurées par IRM et un modèle 0D représentant le réseau vasculaire périphérique comme conditions aux limites. Aussi, afin d'adapter le modèle à l'aorte du patient, une loi de pression exprimant une relation entre la section aortique à la pression et basée sur la compliance a été utilisée. Cette dernière, liée à la vitesse d'onde de pouls (VOP), a été mesurée en IRM sur les ondes de vitesse.Par ailleurs, les séquences de codage de vitesse et d'accélération sont longues et ponctuées d'artéfacts dus au mouvement du patient. Une apnée est requise afin de limiter le mouvement respiratoire. Cependant, la durée de l'apnée atteint 25 à 30 secondes pour de telles séquences, ce qui est souvent impossible à tenir pour les malades. Une technique d'optimisation de séquences dynamiques par réduction du champ de vue est proposée et étudiée. La technique décrit un dépliement des régions repliées par différence complexe de deux images, l'une codée et l'autre non codée en vitesse. Cette méthode réalise une réduction de plus de 25% de la durée d'apnée.
8
CROS, François. "Confluences, remplissage et vidange: deux aspects singuliers du système veineux jambier." Phd thesis, Université Paris-Diderot - Paris VII, 2003. http://tel.archives-ouvertes.fr/tel-00004089.
Full textAbstract:
L'objectif de ce travail est de contribuer à la modélisation globale du système veineux jambier entrepris par les Laboratoires Innothera, en étudiant deux de ces aspects singuliers. La première partie porte sur les confluences. A l'aide d'une étude numérique validée expérimentalement nous proposons deux modèles permettant, d'une part de prédire la perte de charge singulière d'une confluence en fonction de sa géométrie et de son régime d'écoulement et, d'autre part, de prendre en compte les effets non newtoniens du sang en introduisant une viscosité dont la valeur dépend du débit. La seconde partie porte sur le remplissage et la vidange d'un tuyau souple. A l'aide d'un banc hydrodynamique nous avons développé une méthode de mesure de loi d'état de ces tuyaux et un modèle rendant compte de la cinématique de leur paroi. Enfin, nous avons réalisé la validation d'un code de simulation numérique permettant de résoudre le problème de l'écoulement d'un fluide dans une conduite déformable.
9
PUCCI, EGIDIO. "Innovative design process for industrial gas turbine combustors." Doctoral thesis, 2018. http://hdl.handle.net/2158/1126566.
Full textAbstract:
This thesis is tracking the design process footprints, from the wide initial scenario of a new combustor design for industrial gas turbines, down to detailed design aspects, passing through sealing system design with turbine nozzle, up to a specific liner cooling architecture and its optimization.
Main effort of this job has been focused on the creation of a numerical tool, able, since the early phase of development, to analyze the liner cooling with a one-dimensional conjugate aero-thermal-strain approach: liner cold side heat transfer coefficients in a turbulated forced convection region are iteratively computed updating metal and air temperatures and the deformed geometry of coolant passages from results of a heat balance. Coolant passages, in between the deformed surfaces of liner and baffle, influence the air velocity, changing in turn heat transfer coefficients and coolant pressure losses. The computation of liner and baffle strain has been validated comparing the code results with the ones obtained by a detailed finite element model.
Correlations embedded in the code have been calibrated thanks to a comparison with temperatures and pressures experimental measurements, which have been acquired in a full annular rig test campaign.
The code has been provided with two additional optimization routines, developed to automatically improve the baffle design for an enhancement of the liners durability, without penalizing engine performance. Maintaining the same coolant pressure losses and minimizing the axial gradients of metal temperature by means of a variable gap baffle geometry, a reduction of thermal induced stresses can be achieved.
The reader will follow problems and solutions, sizing criteria and uncertainties estimation of the combustor architecture adopted in the BHGE NovaLT industrial gas turbine class, up to reach the testing phase of the manufactured components and finally the baffle design solution optimization.
Reliability of the liner cooling system depends also by the reliability of the leakage prediction across the interface between liners and turbine first stage nozzles. In parallel to the baffle design optimization, studies have been performed on this sealing systems, aimed to increase the reliability of the combustor flow split prediction and to identify areas of improvement of the sealing. The criteria for selection and design of the most suitable sealing system and related durability analyses will be presented, completing the picture of the combustor flow split and synergistically improving the reliability of the liners cooling design presented.
10
Cheng, Pei-Yi, and 鄭珮漪. "A Computer Code for the 1D Extension and Optimization Analysis." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/62948285737650147035.
Full textAbstract:
碩士<br>國立臺灣科技大學<br>機械工程系<br>93<br>This research is aimed to develop a complete code that can provide the user a path layout and an optimal speeds setup for a 1D extension system.
Prior to analysis, the user needs just to provide the system configuration such as roller locations, radius, friction, and rollers speeds, then the program will output the system layout for first check. The tension analysis then follows to give users initial understanding.
The complete code embarks an optimization process in which the user specifies an object function that could be tensions or speeds related and yields the optimal setup for extension process. In the searching of optimal solution, the topographical method and variable metric method are used. At last, two examples, one with minimum tension variation and one with specified tension requirement are demonstrated. The results showed the applicability of the developed method and the relations between tension and speeds as well. This computer code is believed to provide the analyzer and designer a useful tool for extension process.
Book chapters on the topic "Codice 1D"
1
Almeida, Paulo, Diego Napp, and Raquel Pinto. "From 1D Convolutional Codes to 2D Convolutional Codes of Rate 1/n." In Coding Theory and Applications. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17296-5_2.
Full text
2
Calvagno, G., M. Cantagallo, G. A. Mian, and R. Rinaldo. "Synthesis Filter Bank Optimization in 1D and 2D Separable Subband Coding." In Multimedia Communications. Springer London, 1999. http://dx.doi.org/10.1007/978-1-4471-0859-7_2.
Full text
3
Pandey, Anukul, Butta Singh, Barjinder Singh Saini, and Neetu Sood. "Nonlinear Complexity Sorting Approach for 2D ECG Data Compression." In Computational Tools and Techniques for Biomedical Signal Processing. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0660-7.ch001.
Full textAbstract:
Cardiovascular Disease (CVD) is globally acknowledged research problem. The continuous Electrocardiogram (ECG) monitoring can assist in tackling the problem of CVD. The redundancy in the monitoring of ECG signal is reduced by various signal processing techniques either in 1D or 2D domain. This chapter is having the sole objective of reviewing the existing 2D ECG data compression techniques and comparing it with the 1D compression techniques. Furthermore, proposing a novel nonlinear complexity sorting approach for 2D ECG data compression. The broad basic steps involved in the procedure are preprocessing, transformation and encoding. The preprocessing steps includes QRS detection, 2D ECG image formulation, Dc quantization and complexity sorting. The second stage of transformation includes the various decomposition techniques. At encoding stage, standard image codec (JPEG2000) can be employed. The performance evaluation of the proposed complexity sorting algorithm is performed on records of Massachusetts Institute of Technology – Beth Israel Hospital arrhythmia database.
4
Hinkle, Lee B., Gentry Atkinson, and Vangelis Metsis. "An End-to-End Methodology for Semi-Supervised HAR Data Collection, Labeling, and Classification Using a Wristband." In Ambient Intelligence and Smart Environments. IOS Press, 2022. http://dx.doi.org/10.3233/aise220066.
Full textAbstract:
This work presents a semi-automated labeling system for Human Activity Recognition (HAR) datasets. A 1D-CNN trained on scripted activities is used to generate predicted labels for free-form walking segments. Labels below a confidence threshold are marked for review using closed captioned video reducing the time required to label the unscripted sequences. The publicly available TWristAR dataset collected for this work includes Empatica e4 wristband data recorded during six HAR activities and free-form walks. A complete time-stamped video record is provided which we believe makes this dataset unique and useful. Our 1D-CNN model achieves a subject-dependent accuracy of 96.4% and a subject-independent accuracy of 77.4% for six scripted activities. The source code for this work is available at https://github.com/imics-lab/Semi-Supervised-HAR-e4-Wristband.
5
Ottoni V., Mahler C.F., Van Genuchten M.Th., and Pontedeiro E.M.B.D. "Simulations of Vertical Flow Through a MSW Landfill Using a One-Dimensional Approach." In From Fundamentals to Applications in Geotechnics. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-603-3-1341.
Full textAbstract:
Water flow and its dynamics in space and time within a municipal solid waste (MSW) landfill is known to significantly affect biogeochemical processes, including the generation of landfill leachate and its dissolved contaminants. Since water plays a key role in the generation of leachate, models to simulate fluid flow into and through the waste are needed to predict leachate discharge rates. In this study we focused on flow processes within an existing landfill located in Nova Igua&ccedil;u, Rio de Janeiro, Brazil, using simulations carried out with the HYDRUS-1D computer software package. The saturated hydraulic conductivity of the landfill cover was characterized experimentally after its closure. Some of the unsaturated hydraulic parameters were estimated from soil texture using pedotransfer functions. Simulated leachate rates compared well with observed discharge data. Results indicate that the flow regime within a landfill body is strongly influenced by local weather conditions (especially pluviometry), as well as by the makeup, permeability and thickness of the final landfill cover. The HYDRUS-1D code as used in this study, even if applicable only to one-dimensional flow, was found to be a very useful tool for studying water flow and leaching processes in the landfill.
6
Salciarini Diana, Castorino Giuseppe Claudio, Cuomo Sabatino, and Tamagnini Claudio. "A New Tool for Large-Area Analysis of Transient Pore Water Pressures in Layered Shallow Covers Prone to Failure." In Geotechnical Safety and Risk V. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-580-7-772.
Full textAbstract:
In this paper we present a modified version of an existing, physically-based model for shallow landslide susceptibility analysis over large area. In general, the potentially unstable soil cover is considered uniform and homogeneous, over impervious underlying bedrock. In several case studies, this was proven to be unrealistic. The possibility of taking into account the detailed configuration of the soil cover allows having a more accurate estimate of the potentially unstable volumes, which determine the intensity of the considered phenomena. The newly&ndash;implemented tool was tested by comparing its results with those obtained from a Finite Element (FE) commercial code, solving the same 1D problem. Then, a parametric analysis was carried out by varying the permeability ratio between the two layers, with the aim of examining the influence of such parameter on the pore-pressure distribution along the vertical profile. As expected, as the permeability ratio increases, the underlying layer tends to behave as an impervious boundary. This increases the chance that only the most superficial soil layer fails. An analysis of the routine performance and efficiency was also done to investigate the response of the model with various tolerances and different spatial discretizations along the vertical profile. As main result, it is shown that the variability in ground conditions may highly affect the pore water pressures and the proposed seepage model can be successfully whether detailed stratigraphy site investigations are available.
7
Salciarini Diana, Castorino Giuseppe C., Cuomo Sabatino, and Tamagnini Claudio. "A New Tool for Large-Area Analysis of Transient Pore Water Pressures in Layered Shallow Covers Prone to Failure." In Geotechnical Safety and Risk V. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-580-7-791.
Full textAbstract:
In this paper we present a modified version of an existing, physically-based model for shallow landslide susceptibility analysis over large area. In general, the potentially unstable soil cover is considered uniform and homogeneous, over impervious underlying bedrock. In several case studies, this was proven to be unrealistic. The possibility of taking into account the detailed configuration of the soil cover allows having a more accurate estimate of the potentially unstable volumes, which determine the intensity of the considered phenomena. The newly&ndash;implemented tool was tested by comparing its results with those obtained from a Finite Element (FE) commercial code, solving the same 1D problem. Then, a parametric analysis was carried out by varying the permeability ratio between the two layers, with the aim of examining the influence of such parameter on the pore-pressure distribution along the vertical profile. As expected, as the permeability ratio increases, the underlying layer tends to behave as an impervious boundary. This increases the chance that only the most superficial soil layer fails. An analysis of the routine performance and efficiency was also done to investigate the response of the model with various tolerances and different spatial discretizations along the vertical profile. As main result, it is shown that the variability in ground conditions may highly affect the pore water pressures and the proposed seepage model can be successfully whether detailed stratigraphy site investigations are available.
Conference papers on the topic "Codice 1D"
1
Cervi, Eric, Ling Zou, and Rui Hu. "Validation of the SAM Code: Development of a Coupled 1D/3D Model of the TALL-3D Natural Circulation Loop." In 2024 International Congress on Advances in Nuclear Power Plants (ICAPP). American Nuclear Society, 2024. http://dx.doi.org/10.13182/t130-44528.
Full text
2
Zhi-hui, Zhang, and Zhang Jun. "Unsymmetrical SPIHT Codec and 1D SPIHT Codec." In 2010 International Conference on Electrical and Control Engineering (ICECE). IEEE, 2010. http://dx.doi.org/10.1109/icece.2010.618.
Full text
3
Kishimoto, Koki, Kei Kawamura, and Haruhisa Kato. "1D displacement coding for the displaced subdivision surface." In 2023 IEEE International Conference on Visual Communications and Image Processing (VCIP). IEEE, 2023. http://dx.doi.org/10.1109/vcip59821.2023.10402731.
Full text
4
Liang, Liang, Zhouyu Liu, Hongchun Wu, Sheng Wang, Qian Zhang, and Qiang Zhao. "Development and Application of a 2D/1D Fusion Code With Leakage Reconstruction Method." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81507.
Full textAbstract:
The 2D/1D fusion method (2D/1D method) is becoming a popular transport method for whole-core calculations, which reduces the group condense and assembly homogenization approximations in the conventional two-step reactor physics calculations. In most 2D/1D codes, a pin is chosen as a 1D calculation domain, which assumes that the axial leakage of the pin is flat on top/bottom surfaces. Similar to the axial leakage, the radial leakage of every 2D plane also introduces several approximations along axial direction for the 1D calculation. In this paper a 2D/1D fusion code is developed, while a leakage reconstruction method is proposed and applied. In this 2D/1D fusion code, MOC is applied to the radial 2D calculation and the Sn diamond difference method is used for the axial 1D calculation. Numerical results indicate that the 2D/1D fusion code developed in this paper is precise in three-dimensional transport calculation and show the performance of this leakage reconstruction method especially when the leakage term is significant.
5
De, Sagnik, Prithwijit Mukherjee, and Anisha Halder Roy. "EEG-Based Intelligence Quotient Assessment Using 1D Convolutional Neural Network." In 2023 8th International Conference on Computers and Devices for Communication (CODEC). IEEE, 2023. http://dx.doi.org/10.1109/codec60112.2023.10465688.
Full text
6
Lopes, D. T., and C. C. Motta. "1D large signal time-domain code for TWT." In 2011 IEEE Pulsed Power Conference (PPC). IEEE, 2011. http://dx.doi.org/10.1109/ppc.2011.6191448.
Full text
7
Rasooli, N., S. Besharat Shafiei, and H. Khaledi. "Combination of 1D Code and CFD for Performance Analysis of a Silo Type Gas Turbine Combustor." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-23319.
Full textAbstract:
Whereas Gas Turbines are the most important producers of Propulsion and Power in the world and with attention to the importance of combustion chamber as one of the three basic components of Gas Turbine, various activities in different levels have been done on this component. Because of the environmental limitations and laws related to the pollutants such as NOx and CO, Lean Premixed Combustion Chambers are specially considered in gas turbine industries. This study is part of a Multi-Layer simulation of the whole gas turbine cycle in MPG Company. In this work, the combination of a general 1D code and CFD is used for deriving appropriate performance curves for a 1D and 0D gas turbine design, off-design and dynamic cycle code. This 1D code is a general code which has been developed for different combustion chambers; annular, can-annular, can type and silo type combustion chambers. The purpose of generating this 1D code is the possibility of fast analysis of combustors in different operating conditions and reaching required outputs. This 1D code is a part of a general simulation 1D code for gas turbine and was used for a silo type combustor performance prediction. This code generates required quantities such as pressure loss, exit temperature, liner temperature and mass distribution through the combustion chamber. Mass distribution and pressure loss are analyzed and determined with an electrical analogy. Results derived from 1D code are validated with empirical data available for different combustors. There is appropriate agreement between these experimental and analytical results. Drag coefficients for liner holes are available from experimental data and for burner are calculated as a curve with CFD simulations. What differs this code from other 1D codes for gas turbine combustors is the advantage of using combustion efficiencies evolved from numerical simulation results in different loads. These efficiencies are determined with CFD simulations and are available as maps and inserted into the gas temperature calculation algorithm of 1D code. In other 1D codes in this field, empirical correlations are used for combustion efficiency determination. Combustion efficiency curves for design and off-design conditions in this study are achieved by 2D and 3D simulation of combustion chamber with application of EBU/Finite Rate model and 8 step reactions of CH4 burning. Diffusion flame in low loads and premixed flame in high loads are considered. Flame stability and Lean Blow Out charts are evolved from CFD simulation and Heat transfer is applied with empirical correlations.
8
Laroche, G., J. Jung, and B. Pesquet. "Intra prediction with 1D macroblock partitioning for image and video coding." In IS&T/SPIE Electronic Imaging, edited by Majid Rabbani and Robert L. Stevenson. SPIE, 2009. http://dx.doi.org/10.1117/12.805846.
Full text
9
Manikopoulos, C. N., J. Li, and H. Sun. "Nonlinear neural prediction in 1D DPCM for efficient image data coding." In [Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing. IEEE, 1991. http://dx.doi.org/10.1109/icassp.1991.151082.
Full text
10
AL-Khafaji, Ghadah K., Uhood S. Al-Hassani, and Rafaa I. Yahya. "Lossless Medical Image Compression using 1D/2D Linear Polynomial Coding Techniques." In 2024 International Congress on Human-Computer Interaction, Optimization and Robotic Applications (HORA). IEEE, 2024. http://dx.doi.org/10.1109/hora61326.2024.10550510.
Full textReports on the topic "Codice 1D"
1
Kasinathan, N., A. Rajakumar, G. Vaidyanathan, and S. C. Chetal. Simulation of decay heat removal by natural convection in a pool type fast reactor model-ramona-with coupled 1D/2D thermal hydraulic code system. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/107783.
Full text