Relevant bibliographies by topics / Entropy map

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Academic literature on the topic 'Entropy map'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Entropy map"

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KOSSAKOWSKI, A., M. OHYA, and N. WATANABE. "QUANTUM DYNAMICAL ENTROPY FOR COMPLETELY POSITIVE MAP." Infinite Dimensional Analysis, Quantum Probability and Related Topics 02, no. 02 (June 1999): 267–82. http://dx.doi.org/10.1142/s021902579900014x.

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A dynamical entropy for not only shift but also completely positive (CP) map is defined by generalizing the AOW entropy1 defined through quantum Markov chain and AF entropy defined by a finite operational partition. Our dynamical entropy is numerically computed for several models.
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Ma, Dongkui, and Bin Cai. "TOPOLOGICAL ENTROPY OF PROPER MAP." Taiwanese Journal of Mathematics 18, no. 4 (August 2014): 1219–41. http://dx.doi.org/10.11650/tjm.18.2014.3339.

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Dolgopyat, D. "Entropy of coupled map lattices." Journal of Statistical Physics 86, no. 1-2 (January 1997): 377–89. http://dx.doi.org/10.1007/bf02180211.

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Fullwood, James, and Arthur J. Parzygnat. "The Information Loss of a Stochastic Map." Entropy 23, no. 8 (August 8, 2021): 1021. http://dx.doi.org/10.3390/e23081021.

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We provide a stochastic extension of the Baez–Fritz–Leinster characterization of the Shannon information loss associated with a measure-preserving function. This recovers the conditional entropy and a closely related information-theoretic measure that we call conditional information loss. Although not functorial, these information measures are semi-functorial, a concept we introduce that is definable in any Markov category. We also introduce the notion of an entropic Bayes’ rule for information measures, and we provide a characterization of conditional entropy in terms of this rule.
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Bjørke, Jan T. "Framework for Entropy-based Map Evaluation." Cartography and Geographic Information Systems 23, no. 2 (January 1996): 78–95. http://dx.doi.org/10.1559/152304096782562136.

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BYSZEWSKI, JAKUB, FRYDERYK FALNIOWSKI, and DOMINIK KWIETNIAK. "Transitive dendrite map with zero entropy." Ergodic Theory and Dynamical Systems 37, no. 7 (March 8, 2016): 2077–83. http://dx.doi.org/10.1017/etds.2015.136.

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Hoehn and Mouron [Hierarchies of chaotic maps on continua. Ergod. Th. & Dynam. Sys.34 (2014), 1897–1913] constructed a map on the universal dendrite that is topologically weakly mixing but not mixing. We modify the Hoehn–Mouron example to show that there exists a transitive (even weakly mixing) dendrite map with zero topological entropy. This answers the question of Baldwin [Entropy estimates for transitive maps on trees. Topology40(3) (2001), 551–569].
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Xiong, Jincheng. "A CHAOTIC MAP WITH TOPOLOGICAL ENTROPY." Acta Mathematica Scientia 6, no. 4 (October 1986): 439–43. http://dx.doi.org/10.1016/s0252-9602(18)30503-4.

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Boling, Jess, Casey Kelleher, and Jeffrey Streets. "Entropy, stability and harmonic map flow." Transactions of the American Mathematical Society 369, no. 8 (April 24, 2017): 5769–808. http://dx.doi.org/10.1090/tran/6949.

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Fox, Ronald F. "Entropy evolution for the Baker map." Chaos: An Interdisciplinary Journal of Nonlinear Science 8, no. 2 (June 1998): 462–65. http://dx.doi.org/10.1063/1.166327.

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Sun, Tai Xiang. "Topological entropy of a graph map." Acta Mathematica Sinica, English Series 34, no. 2 (November 28, 2017): 194–208. http://dx.doi.org/10.1007/s10114-017-7236-6.

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Dissertations / Theses on the topic "Entropy map"

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Krützmann, Nikolai Christian. "Application of Complexity Measures to Stratospheric Dynamics." Thesis, University of Canterbury. Physics and Astronomy, 2008. http://hdl.handle.net/10092/2020.

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This thesis examines the utility of mathematical complexity measures for the analysis of stratospheric dynamics. Through theoretical considerations and tests with artificial data sets, e.g., the iteration of the logistic map, suitable parameters are determined for the application of the statistical entropy measures sample entropy (SE) and Rényi entropy (RE) to methane (a long-lived stratospheric tracer) data from simulations of the SOCOL chemistry-climate model. The SE is shown to be useful for quantifying the variability of recurring patterns in a time series and is able to identify tropical patterns similar to those reported by previous studies of the ``tropical pipe'' region. However, the SE is found to be unsuitable for use in polar regions, due to the non-stationarity of the methane data at extra-tropical latitudes. It is concluded that the SE cannot be used to analyse climate complexity on a global scale. The focus is turned to the RE, which is a complexity measure of probability distribution functions (PDFs). Using the second order RE and a normalisation factor, zonal PDFs of ten consecutive days of methane data are created with a Bayesian optimal binning technique. From these, the RE is calculated for every day (moving 10-day window). The results indicate that the RE is a promising tool for identifying stratospheric mixing barriers. In Southern Hemisphere winter and early spring, RE produces patterns similar to those found in other studies of stratospheric mixing. High values of RE are found to be indicative of the strong fluctuations in tracer distributions associated with relatively unmixed air in general, and with gradients in the vicinity of mixing barriers, in particular. Lower values suggest more thoroughly mixed air masses. The analysis is extended to eleven years of model data. Realistic inter-annual variability of some of the RE structures is observed, particularly in the Southern Hemisphere. By calculating a climatological mean of the RE for this period, additional mixing patterns are identified in the Northern Hemisphere. The validity of the RE analysis and its interpretation is underlined by showing that qualitatively similar patterns can be seen when using observational satellite data of a different tracer. Compared to previous techniques, the RE has the advantage that it requires significantly less computational effort, as it can be used to derive dynamical information from model or measurement tracer data without relying on any additional input such as wind fields. The results presented in this thesis strongly suggest that the RE is a useful new metric for analysing stratospheric mixing and its variability from climate model data. Furthermore, it is shown that the RE measure is very robust with respect to data gaps, which makes it ideal for application to observations. Hence, using the RE for comparing observations of tracer distributions with those from model simulations potentially presents a novel approach for analysing mixing in the stratosphere.
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Altun, Melih. "Road Scene Content Analysis for Driver Assistance and Autonomous Driving." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1418665048.

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Jesus, Benedito Carlos de. "Mapa conceitual como ferramenta para o ensino das leis da termodinâmica." Universidade Federal de Mato Grosso, 2015. http://ri.ufmt.br/handle/1/256.

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O presente trabalho apresenta os resultados de um estudo feito junto aos alunos de Licenciatura Plena e Bacharelado em Ciências Biológicas da UNEMAT – UNIVERSIDADE ESTADUAL DE MATO GROSSO, situada no município de Cáceres-MT. A pesquisa foi realizada na turma 2014/2-CAC690 de período integral com 27 alunos no segundo semestre de 2014, sendo utilizada a tríade do contexto da pesquisa: ato de ensinar – contexto de sala de aula – avaliação. Nesta tríade sugere que o professor no ato de ensinar, utilize mapas conceituais como ferramenta de ensino para negociar significados. E dentro do contexto da sala de aula, investigar quais os conhecimentos prévios que os alunos de biologia têm sobre entropia e através do mapa conceitual construído pelos alunos avaliar a evolução dos conceitos estudados. A estratégia a ser desenvolvida para a construção dos mapas conceituais envolveu a metodologia qualitativa, onde o significado que os alunos dão aos conceitos de entropia e a vida são focos de atenção especial do pesquisador, porque isso significava que nas três etapas especificas que fossem construídos os mapas conceituais pudessem averiguar se os alunos hierarquizaram, diferenciaram os conceitos principais dos secundários, relacionaram os conceitos de entropia com a termodinâmica e como eles integrariam os conceitos de entropia, isto é, como eles reconciliam integrativamente esse conceito. Ao todo foram seis etapas (aulas), sendo a primeira para aplicação do pré-teste, a segunda para orientar na construção do mapa conceitual, a terceira e quarta, quinta e sexta para a construção dos mapas conceituais. As análises dos mapas conceituais serviram para avaliar se houve a aprendizagem significativa.
The present work presents the results of a study done by graduate students and Bachelor of biological sciences UNEMAT-UNIVERSIDADE ESTADUAL DE MATO GROSSO, in the municipality of Cáceres-MT. The survey was conducted in the class 2014/2-full-time CAC690 with 27 students in the second half of 2014, being used the search context triad: Act of teaching – classroom context – assessment. In this triad suggests that the teacher in the Act of teaching, use conceptual maps as teaching tool to negotiate meanings. And within the context of the classroom, into which the previous knowledge that biology students have about entropy and through the concept map constructed by the students evaluate the evolution of the concepts studied. The strategy to be developed for the construction of concept maps involved the qualitative methodology, where the meaning that students give to the concepts of entropy and life are foci of attention and Special attention of the researcher, because this meant that in three specific steps that were built the conceptual maps could ascertain whether students rank, differentiated the main concepts of the secondary, related the concepts of entropy in thermodynamics and how they integrated the concepts of entropy, i.e. how they reconcile this concept integrativamente. Altogether there were seven steps (classes), being the first and the last to implement the tests, for subsequent comparison of the results. The results served to analyse and assess whether what was examined proved to be efficient and significant learning was reached.
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Sina, Md Ibne. "Satellite Image Processing with Biologically-inspired Computational Methods and Visual Attention." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23122.

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The human vision system is generally recognized as being superior to all known artificial vision systems. Visual attention, among many processes that are related to human vision, is responsible for identifying relevant regions in a scene for further processing. In most cases, analyzing an entire scene is unnecessary and inevitably time consuming. Hence considering visual attention might be advantageous. A subfield of computer vision where this particular functionality is computationally emulated has been shown to retain high potential in solving real world vision problems effectively. In this monograph, elements of visual attention are explored and algorithms are proposed that exploit such elements in order to enhance image understanding capabilities. Satellite images are given special attention due to their practical relevance, inherent complexity in terms of image contents, and their resolution. Processing such large-size images using visual attention can be very helpful since one can first identify relevant regions and deploy further detailed analysis in those regions only. Bottom-up features, which are directly derived from the scene contents, are at the core of visual attention and help identify salient image regions. In the literature, the use of intensity, orientation and color as dominant features to compute bottom-up attention is ubiquitous. The effects of incorporating an entropy feature on top of the above mentioned ones are also studied. This investigation demonstrates that such integration makes visual attention more sensitive to fine details and hence retains the potential to be exploited in a suitable context. One interesting application of bottom-up attention, which is also examined in this work, is that of image segmentation. Since low salient regions generally correspond to homogenously textured regions in the input image; a model can therefore be learned from a homogenous region and used to group similar textures existing in other image regions. Experimentation demonstrates that the proposed method produces realistic segmentation on satellite images. Top-down attention, on the other hand, is influenced by the observer’s current states such as knowledge, goal, and expectation. It can be exploited to locate target objects depending on various features, and increases search or recognition efficiency by concentrating on the relevant image regions only. This technique is very helpful in processing large images such as satellite images. A novel algorithm for computing top-down attention is proposed which is able to learn and quantify important bottom-up features from a set of training images and enhances such features in a test image in order to localize objects having similar features. An object recognition technique is then deployed that extracts potential target objects from the computed top-down attention map and attempts to recognize them. An object descriptor is formed based on physical appearance and uses both texture and shape information. This combination is shown to be especially useful in the object recognition phase. The proposed texture descriptor is based on Legendre moments computed on local binary patterns, while shape is described using Hu moment invariants. Several tools and techniques such as different types of moments of functions, and combinations of different measures have been applied for the purpose of experimentations. The developed algorithms are generalized, efficient and effective, and have the potential to be deployed for real world problems. A dedicated software testing platform has been designed to facilitate the manipulation of satellite images and support a modular and flexible implementation of computational methods, including various components of visual attention models.
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Szmoski, Romeu Miquéias. "Introdução de quantidades efetivas para o estudo da sincronização e criptografia baseada em sistemas não-síncronos." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2013. http://tede2.uepg.br/jspui/handle/prefix/900.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Synchronization is a dynamical behavior exhibited by a wide range of systems. Neurons, firefly and Josephson junctions are examples of these systems. It is defined as an adjustment of rhythms of oscillating objects due to weak interaction between them, and it is studied using different mathematical models including the coupled map lattices (CMLs). In CML the synchronization corresponds to process in which all state variables become identical at the same instant. Usually we study the CML synchronization by calculating the conditional Lyapunov exponents. However, if the coupling or network topology is time-varying, this exponents are not readily determined. In this work we propose new quantities to study the synchronization in these CMLs. These quantities are defined as weighted averages over all possible topologies and, if the topology is constant, they are equivalent to the usual Lyapunov exponents. We find an analytical expression for the effective quantities when the topology is invariant over translation on the network and demonstrate that an ensemble of short time observations can be used to predict the long-term behavior of the lattice. Also we point that, if network has constant and homogeneous structure, the effective quantities correspond to the projection on the eigenvectors associated with this structure. We show the availability of effective quantities using them to build a lattice with constant topology that exhibits the same synchronization critical properties of the lattice with time-varying topology. Finally, we present a cryptosystem for communication systems based on two replica synchronized networks whose elements are not synchronous. We investigate it as to operation time, robustness and security against intruders. Our results suggest that it is safe and efficient for a wide range of parameters.
A sincronização é um comportamento dinâmico exibido por uma ampla variedade de sistemas naturais tais como neurônios, vaga-lumes e junções Josephson. Ela é definida como um ajuste de ritmos de objetos oscilantes devido a uma fraca interação entre eles, e é estudada usando diferentes modelos matemáticos tais como as redes de mapas acoplados (RMAs). Em uma RMA, o processo de sincronização representa uma evolução conjunta entre todas variáveis de estados. Este processo é geralmente investigado com base nos expoentes de Lyapunov condicionais. No entanto, para redes com topologia variável tais expoentes não são facilmente determinados. Neste trabalho propomos novas quantidades para estudar a sincronização nestas redes. Estas quantidades são definidas como médias ponderadas sobre todas as topologias possíveis e, no caso em que a topologia é constante, equivalem aos expoentes de Lyapunov usuais. Encontramos uma expressão analítica para as quantidades efetivas para o caso em que a topologia é invariante sobre translação na rede e demonstramos que um conjunto de observações sobre um intervalo curto de tempo pode ser usado para predizer o comportamento da rede a longo prazo. Também verificamos que, se a rede possui uma estrutura constante e homogênea, as quantidades efetivas podem ser obtidas considerando a projeção sobre os autovetores associados a esta estrutura. Mostramos a eficácia das quantidades efetivas usando-as para construir uma rede com topologia constante que exibe as mesmas propriedades de sincronização da rede com topologia variável. Por último apresentamos um criptossistema para sistemas de comunicação que é baseado em duas réplicas de redes sincronizadas cujos elementos são não-síncronos. Investigamos este sistema quanto ao tempo de operação, a robustez e a segurança contra intrusos. Nossos resultados sugerem que ele é seguro e eficiente para uma amplo intervalo de parâmetros.
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Suntov, Victoria. "Cartographie des indices de diversité : applications aux communautés de poissons démersaux en Mer Méditerranée." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20094/document.

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La biodiversité marine et terrestre subit de multiples perturbations dues à la pression anthropique ainsi qu'au changement global, qui peuvent affecter la diversité spécifique et le fonctionnement des écosystèmes associés. Dans ce contexte, la cartographie des indices de diversité permet d'analyser les variations spatio-temporelles de la diversité spécifique, et d'identifier des régions à caractère prioritaire dans un cadre de gestion. Le premier objectif de cette thèse est d'évaluer la pertinence des deux approches disponibles pour la cartographie des indices de diversité, ici considérée sans la prise en compte de variables explicatives dans un modèle pour l'interpolation spatiale : (i) l'approche indirecte qui consiste à interpoler individuellement chaque espèce des assemblages échantillonnés, puis à calculer a posteriori l'indice de diversité sur l'ensemble de la zone étudiée, (ii) l'approche directe qui consiste à calculer a priori l'indice au niveau des assemblages, puis à l'interpoler sur l'ensemble de la zone d'étude. Nous montrons que les deux approches présentent des limites importantes pour cartographier rigoureusement les indices de diversité. En effet, d'une part l'approche indirecte est difficile à mettre en œuvre en pratique due à la forte proportion des espèces rares dans le milieu naturel (données zéro inflatées). D'autre part, le non-respect de la propriété mathématique de l'addivitié des indices rend l'approche directe non pertinente pour l'interpolation. Le second objectif de la thèse est d'étudier la variabilité spatio-temporelle de la diversité des assemblages de poissons démersaux en mer Méditerranée, région présentant un grand intérêt scientifique, de par sa forte diversité ainsi que des conditions environnementales et anthropiques contrastées qui s'y exercent. Une approche multi-composante et multi-échelle a été adoptée pour analyser un jeu de données constitué de 19 886 traits de chalut réalisés entre 10 à 800 m de profondeur dans le cadre des campagnes scientifiques annuelles MEDITS effectuées depuis 1994 dans la zone nord Méditerranéenne ainsi qu'en Algérie plus récemment. Nous montrons que la diversité des assemblages de poissons démersaux ne suit pas le gradient longitudinal traditionnellement attendu et/ou observé pour d'autres groupes faunistiques pour aucun des indices et échelles analysés. Néanmoins, nous avons identifié des hotspots de richesse spécifique à Malte, dans la zone Ibérique, et les mers Egée et Ionienne. En revanche, l'équitabilité, les divergences taxonomique, phylogénétique et fonctionnelle n'ont pas présentés de tels hotspots, mais se sont révélées spatialement hétérogènes au sein de chaque région. D'autre part toutes les composantes de la diversité étudiées sont stables au cours des deux dernières décennies. Ce travail apporte des éléments de connaissance essentiels dans cette zone pour la cartographie d'indices de diversité par de futurs modèles incluant des variables explicatives abiotiques et/ou biotiques qui, compte tenu de ce qui a été souligné par le premier volet de la thèse, constituerait une alternative pour l'interpolation spatiale des indices. Toutefois, des efforts restent nécessaires pour identifier et acquérir des données pertinentes à l'échelle de la zone d'étude sur les facteurs biotiques et abiotiques susceptibles d'influencer la distribution de la diversité des assemblages demersaux, par exemple, les interactions entre espèces, l'effort de pêche à partir des données Vessel Monitoring System. Dans l'ensemble, les résultats de cette thèse confirment la nécessité d'utiliser des indices complémentaires lors de l'élaboration des stratégies de suivi de la diversité et la localisation de zones prioritaires de protection, et a permis d'identifier des indices proxies pour suivre les poissons démersaux en Méditerranée. D'autre part, elle met en évidence les limites et le besoin d'avancées méthodologiques pour une cartographie pertinente des indices de diversité
Increasing human pressures and global environmental change may severely affect species diversity and ecosystems? functioning. In this context, mapping diversity indices allows monitoring spatial and/or temporal variation in diversity, and helps identifying areas for effective conservation planning. The first objective of this thesis is to evaluate the relevance of using the two available diversity indices' mapping approaches without explanatory variables: i) the indirect approach interpolating each individual species distribution over the studied area, then computing a posteriori the diversity index, (ii) the community-level approach interpolating directly a diversity index over the studied area. We show that mapping index by interpolation methods used in the frame of direct or indirect approach suffers from two main limitations. Firstly, diversity indices are not additive making the direct approach irrelevant to use the direct approach. Secondly, many species in natural communities are scarce (i.e. zero inflated data) making difficult to apply the indirect approach. The second objective of this thesis is to study large spatio-temporal diversity of demersal fish assemblages in the Mediterranean Sea, an area of a particular scientific interest, both for its high diversity and direct human pressure in this region. A multi-component and multi-scale approach was applied to analyze a dataset of 19,886 hauls from 10 to 800 m depth performed annually during the last two decades by standardized scientific bottom trawl field surveys across the Mediterranean Sea, within the MEDITS program. We show that the diversity of demersal fish assemblages sampled by trawl do not follow the observed or expected decreasing longitudinal/latitudinal diversity gradients, for any of the indices and spatial scales analysed. However, we identified hotspots of species richness at both local and regional scales in the Iberian region, Malta, the Eastern Ionian and Aegean seas. In contrast, evenness as well as taxonomic, phylogenetic and functional divergences did not show regional hotspots. All studied diversity components remained stable over the last two decades. Finally, our analysis represents an essential step towards future studies focused on the drivers shaping demersal fish communities? diversity in the Mediterranean Sea using models that will include biotic and/or abiotic explanatory variables to map diversity indices. However, it will require identification and availability of accurate data of these variables at the scale of the Mediterranean Sea (e.g. species interactions, fishing effort from Vessel Monitoring System (VMS) data). Overall, our results highlight the need of using complementary diversity indices through different spatial scales when developing monitoring strategies and defining protected areas. They also identify suitable proxies to monitor demersal fish communities in the Mediterranean Sea. Moreover, this work underlines the main limits of approaches for mapping diversity indices, and the need of further developments in this field
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Ben, salah Imeen. "Extraction d'un graphe de navigabilité à partir d'un nuage de points 3D enrichis." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMR070/document.

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Les caméras sont devenues de plus en plus communes dans les véhicules, les smartphones et les systèmes d'aide à la conduite ADAS (Advanced Driver Assistance Systèmes). Les domaines d'application de ces caméras dans le monde des systèmes intelligents de transport deviennent de plus en plus variés : la détection des piétons, les avertissements de franchissement de ligne, la navigation... La navigation basée sur la vision a atteint une certaine maturité durant ces dernières années grâce à l'utilisation de technologies avancées. Les systèmes de navigation basée sur la vision ont le considérable avantage de pouvoir utiliser directement les informations visuelles présentes dans l'environnement, sans devoir adapter le moindre élément de l'infrastructure. De plus, contrairement aux systèmes utilisant le GPS, ils peuvent être utilisés à l'extérieur ainsi qu'à l'intérieur des locaux et des bâtiments sans aucune perte de précision. C'est pour ces raisons que les systèmes basés sur la vision sont une bonne option car ils fournissent des informations très riches et précises sur l'environnement, qui peuvent être utilisées pour la navigation. Un axe important de recherche porte actuellement sur la cartographie qui représente une étape indispensable pour la navigation. Cette étape engendre une problématique de la gestion de la mémoire assez conséquente requise par ces systèmes en raison de la quantité d'informations importante collectées par chaque capteur. En effet, l'espace mémoire nécessaire pour accueillir la carte d'une petite ville se mesure en dizaines de GO voire des milliers lorsque l'on souhaite couvrir des espaces de grandes dimensions. Cela rend impossible son intégration dans un système mobile tel que les smartphones, les véhicules, les vélos ou les robots. Le défi serait donc de développer de nouveaux algorithmes permettant de diminuer au maximum la taille de la mémoire nécessaire pour faire fonctionner ce système de localisation par vision. C'est dans ce contexte que se situe notre projet qui consiste à développer un nouveau système capable de résumer une carte 3D qui contient des informations visuelles collectées par plusieurs capteurs. Le résumé sera un ensemble des vues sphériques permettant de garder le même niveau de visibilité dans toutes les directions. Cela permettrait aussi de garantir, à moindre coût, un bon niveau de précision et de rapidité lors de la navigation. La carte résumant l'environnement sera constituée d'un ensemble d'informations géométriques, photométriques et sémantiques
Cameras have become increasingly common in vehicles, smart phones, and advanced driver assistance systems. The areas of application of these cameras in the world of intelligent transportation systems are becoming more and more varied : pedestrian detection, line crossing detection, navigation ... Vision-based navigation has reached a certain maturity in recent years through the use of advanced technologies. Vision-based navigation systems have the considerable advantage of being able to directly use the visual information already existing in the environment without having to adapt any element of the infrastructure. In addition, unlike systems using GPS, they can be used outdoors and indoors without any loss of precision. This guarantees the superiority of these systems based on computer vision. A major area of {research currently focuses on mapping, which represents an essential step for navigation. This step generates a problem of memory management quite substantial required by these systems because of the huge amount of information collected by each sensor. Indeed, the memory space required to accommodate the map of a small city is measured in tens of GB or even thousands when one wants to cover large spaces. This makes impossible to integrate this map into a mobile system such as smartphones , cameras embedded in vehicles or robots. The challenge would be to develop new algorithms to minimize the size of the memory needed to operate this navigation system using only computer vision. It's in this context that our project consists in developing a new system able to summarize a3D map resulting from the visual information collected by several sensors. The summary will be a set of spherical views allow to keep the same level of visibility in all directions. It would also guarantee, at a lower cost, a good level of precision and speed during navigation. The summary map of the environment will contain geometric, photometric and semantic information
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Fookes, Clinton Brian. "Medical Image Registration and Stereo Vision Using Mutual Information." Queensland University of Technology, 2003. http://eprints.qut.edu.au/15876/.

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Image registration is a fundamental problem that can be found in a diverse range of fields within the research community. It is used in areas such as engineering, science, medicine, robotics, computer vision and image processing, which often require the process of developing a spatial mapping between sets of data. Registration plays a crucial role in the medical imaging field where continual advances in imaging modalities, including MRI, CT and PET, allow the generation of 3D images that explicitly outline detailed in vivo information of not only human anatomy, but also human function. Mutual Information (MI) is a popular entropy-based similarity measure which has found use in a large number of image registration applications. Stemming from information theory, this measure generally outperforms most other intensity-based measures in multimodal applications as it does not assume the existence of any specific relationship between image intensities. It only assumes a statistical dependence. The basic concept behind any approach using MI is to find a transformation, which when applied to an image, will maximise the MI between two images. This thesis presents research using MI in three major topics encompassed by the computer vision and medical imaging field: rigid image registration, stereo vision, and non-rigid image registration. In the rigid domain, a novel gradient-based registration algorithm (MIGH) is proposed that uses Parzen windows to estimate image density functions and Gauss-Hermite quadrature to estimate the image entropies. The use of this quadrature technique provides an effective and efficient way of estimating entropy while bypassing the need to draw a second sample of image intensities (a procedure required in previous Parzen-based MI registration approaches). It is possible to achieve identical results with the MIGH algorithm when compared to current state of the art MI-based techniques. These results are achieved using half the previously required sample sizes, thus doubling the statistical power of the registration algorithm. Furthermore, the MIGH technique improves algorithm complexity by up to an order of N, where N represents the number of samples extracted from the images. In stereo vision, a popular passive method of depth perception, new extensions have been pro- posed in order to increase the robustness of MI-based stereo matching algorithms. Firstly, prior probabilities are incorporated into the MI measure to considerably increase the statistical power of the matching windows. The statistical power, directly related to the number of samples, can become too low when small matching windows are utilised. These priors, which are calculated from the global joint histogram, are tuned to a two level hierarchical approach. A 2D match surface, in which the match score is computed for every possible combination of template and matching windows, is also utilised to enforce left-right consistency and uniqueness constraints. These additions to MI-based stereo matching significantly enhance the algorithms ability to detect correct matches while decreasing computation time and improving the accuracy, particularly when matching across multi-spectra stereo pairs. MI has also recently found use in the non-rigid domain due to a need to compute multimodal non-rigid transformations. The viscous fluid algorithm is perhaps the best method for re- covering large local mis-registrations between two images. However, this model can only be used on images from the same modality as it assumes similar intensity values between images. Consequently, a hybrid MI-Fluid algorithm is proposed to compute a multimodal non-rigid registration technique. MI is incorporated via the use of a block matching procedure to generate a sparse deformation field which drives the viscous fluid algorithm, This algorithm is also compared to two other popular local registration techniques, namely Gaussian convolution and the thin-plate spline warp, and is shown to produce comparable results. An improved block matching procedure is also proposed whereby a Reversible Jump Markov Chain Monte Carlo (RJMCMC) sampler is used to optimally locate grid points of interest. These grid points have a larger concentration in regions of high information and a lower concentration in regions of small information. Previous methods utilise only a uniform distribution of grid points throughout the image.
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Zaylaa, Amira. "Analyse et extraction de paramètres de complexité de signaux biomédicaux." Thesis, Tours, 2014. http://www.theses.fr/2014TOUR3315/document.

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L'analyse de séries temporelles biomédicales chaotiques tirées de systèmes dynamiques non-linéaires est toujours un challenge difficile à relever puisque dans certains cas bien spécifiques les techniques existantes basées sur les multi-fractales, les entropies et les graphes de récurrence échouent. Pour contourner les limitations des invariants précédents, de nouveaux descripteurs peuvent être proposés. Dans ce travail de recherche nos contributions ont porté à la fois sur l’amélioration d’indicateurs multifractaux (basés sur une fonction de structure) et entropiques (approchées) mais aussi sur des indicateurs de récurrences (non biaisés). Ces différents indicateurs ont été développés avec pour objectif majeur d’améliorer la discrimination entre des signaux de complexité différente ou d’améliorer la détection de transitions ou de changements de régime du système étudié. Ces changements agissant directement sur l’irrégularité du signal, des mouvements browniens fractionnaires et des signaux tirés du système du Lorenz ont été testés. Ces nouveaux descripteurs ont aussi été validés pour discriminer des fœtus en souffrance de fœtus sains durant le troisième trimestre de grossesse. Des mesures statistiques telles que l’erreur relative, l’écart type, la spécificité, la sensibilité ou la précision ont été utilisées pour évaluer les performances de la détection ou de la classification. Le fort potentiel de ces nouveaux invariants nous laisse penser qu’ils pourraient constituer une forte valeur ajoutée dans l’aide au diagnostic s’ils étaient implémentés dans des logiciels de post-traitement ou dans des dispositifs biomédicaux. Enfin, bien que ces différentes méthodes aient été validées exclusivement sur des signaux fœtaux, une future étude incluant des signaux tirés d’autres systèmes dynamiques nonlinéaires sera réalisée pour confirmer leurs bonnes performances
The analysis of biomedical time series derived from nonlinear dynamic systems is challenging due to the chaotic nature of these time series. Only few classical parameters can be detected by clinicians to opt the state of patients and fetuses. Though there exist valuable complexity invariants such as multi-fractal parameters, entropies and recurrence plot, they were unsatisfactory in certain cases. To overcome this limitation, we propose in this dissertation new entropy invariants, we contributed to multi-fractal analysis and we developed signal-based (unbiased) recurrence plots based on the dynamic transitions of time series. Principally, we aim to improve the discrimination between healthy and distressed biomedical systems, particularly fetuses by processing the time series using our techniques. These techniques were either validated on Lorenz system, logistic maps or fractional Brownian motions modeling chaotic and random time series. Then the techniques were applied to real fetus heart rate signals recorded in the third trimester of pregnancy. Statistical measures comprising the relative errors, standard deviation, sensitivity, specificity, precision or accuracy were employed to evaluate the performance of detection. Elevated discernment outcomes were realized by the high-order entropy invariants. Multi-fractal analysis using a structure function enhances the detection of medical fetal states. Unbiased cross-determinism invariant amended the discrimination process. The significance of our techniques lies behind their post-processing codes which could build up cutting-edge portable machines offering advanced discrimination and detection of Intrauterine Growth Restriction prior to fetal death. This work was devoted to Fetal Heart Rates but time series generated by alternative nonlinear dynamic systems should be further considered
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Saboe, Michael S. "A software technology transition entropy based engineering model." Monterey, Calif. : Naval Postgraduate School, 2002. http://edocs.nps.edu/npspubs/scholarly/dissert/2002/Mar/02Mar%5FSaboe%5FPhD.pdf.

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Dissertation (Ph.D. in Software Engineering)--Naval Postgraduate School, March 2002.
Dissertation supervisor: Luqi. "March 2002." Description based on title screen as viewed on July 15, 2010. Author(s) subject terms: Software Engineering, Technology Transfer, Information Theory, Communication Theory, Statistical Mechanics, Dynamical Systems, Control Theory, Learning Curves, Entropy, Information Temperature, Temperature of Software (o Saboe), Technology Transfer Dynamics, Research Management, Diffusion of Innovation, Project Management, Physics of Software Includes bibliographical references (p. 457-489). Also available in print.
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Books on the topic "Entropy map"

1

Jean-Marie, Strelcyn, ed. Invariant manifolds, entropy, and billiards: Smooth maps with singularities. Berlin: Springer-Verlag, 1986.

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Katok, Anatole, Jean-Marie Strelcyn, François Ledrappier, and Feliks Przytycki. Invariant Manifolds, Entropy and Billiards; Smooth Maps with Singularities. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/bfb0099031.

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Boyle, Mike. Resolving maps and the dimension group for shifts of finite type. Providence, R.I., USA: American Mathematical Society, 1987.

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Jin dai Zhejiang dui wai mao yi ji she hui bian qian: Ningbo, Wenzhou, Hangzhou hai guan mao yi bao gao yi bian. Ningbo Shi: Ningbo chu ban she, 2003.

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Wilbourne, David. Archbishop's diary: A year with John Habgood. London: SPCK, 1995.

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Wöhrl, H. G. Projekt "Verbesserung der Eingliederungschancen von älteren langzeitarbeitslosen Schwerbehinderten": Abschlussbericht, Mai 1992. Bonn: Bundesministerium für Arbeit und Sozialordnung, 1992.

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Anderson, George S. Electronic payment prospectively for Ginnie Mae I securities held in book entry form. Washington, D.C: U.S. Dept. of Housing and Urban Development, 1998.

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Ola, Kristensson Per. Discrete and continuous shape writing for text entry and control. Linko ping: Department of Computer and Information Science, Linko ping University, 2007.

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Salvestrini, Francesco, ed. L'Italia alla fine del Medioevo I. Florence: Firenze University Press, 2007. http://dx.doi.org/10.36253/88-8453-388-0.

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Primo di due volumi, il secondo curato da Federica Cengarle, che prendono in esame alcuni 'caratteri originali' dell'Italia tardomedievale rispetto all'Europa del tempo.Dei due convegni dei quali si pubblicano gli atti, il primo – tenutosi nell'ottobre del 2000 – ha cercato di dar conto, in una sezione introduttiva, dei quadri ambientali di lungo periodo entro cui si iscri-ve il percorso della società italiana: il paesaggio rurale e il quadro degli insediamenti urbani, senza dimenticare, nell'uno e nell'altro caso, l'eredità del mondo romano. Il secondo convegno, invece, tenutosi nell'autunno del 2002 si è proposto di prendere in considerazione aspetti e settori di storia della cultura e delle ideologie politiche, della mentalità, della vita religiosa, ma anche la storia delle tecniche.
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Cengarle, Federica, ed. L'Italia alla fine del Medioevo II. Florence: Firenze University Press, 2007. http://dx.doi.org/10.36253/88-8453-390-2.

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Secondo di due volumi, il primo curato da Francesco Salvestrini, che prendono in esame alcuni 'caratteri originali' dell'Italia tardomedievale rispetto all'Europa del tempo.Dei due convegni dei quali si pubblicano gli atti, il primo – tenutosi nell'ottobre del 2000 – ha cercato di dar conto, in una sezione introduttiva, dei quadri ambientali di lungo periodo entro cui si iscri-ve il percorso della società italiana: il paesaggio rurale e il quadro degli insediamenti urbani, senza dimenticare, nell'uno e nell'altro caso, l'eredità del mondo romano. Il secondo convegno, invece, tenutosi nell'autunno del 2002 si è proposto di prendere in considerazione aspetti e settori di storia della cultura e delle ideologie politiche, della mentalità, della vita religiosa, ma anche la storia delle tecniche.
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Book chapters on the topic "Entropy map"

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Tafreshi, R., F. Sassani, H. Ahmadi, and G. Dumont. "Entropy Measure and Energy Map in Machine Fault Diagnosis." In Integrated Systems, Design and Technology 2010, 243–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17384-4_20.

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Patil, Mahendra, Avinash Gawande, and Dilendra. "Biometric Image Encryption Based on Chaotic Sine Map and Information Entropy." In Intelligent Data Communication Technologies and Internet of Things, 724–32. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-34080-3_81.

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Kuroda, Masanori, and Kiyoshi Yokogawa. "The Patterson Map of Tl-Based Superconductor by the Maximum Entropy Method." In Advances in Superconductivity V, 345–48. Tokyo: Springer Japan, 1993. http://dx.doi.org/10.1007/978-4-431-68305-6_75.

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Akiyama, Daishiro, Kazuya Matsuo, and Shuichi Kurogi. "Entropy Maximization of Occupancy Grid Map for Selecting Good Registration of SLAM Algorithms." In Neural Information Processing, 158–67. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46687-3_17.

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Singh, Manoj Kumar, Yong-Hoon Kim, U. S. Tiwary, Rajkishore Prasad, and Tanveer Siddique. "Adaptive Acceleration of MAP with Entropy Prior and Flux Conservation for Image Deblurring." In Proceedings of the First International Conference on Intelligent Human Computer Interaction, 212–20. New Delhi: Springer India, 2009. http://dx.doi.org/10.1007/978-81-8489-203-1_20.

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Yu, Jie, Dongdong Wang, Lingyu Xu, and Rongrong Chen. "A Construction Method of Author Influence Map Based on Data Field Theory and Entropy Weight Method." In Communications in Computer and Information Science, 130–40. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-1922-2_9.

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Małyszko, Dariusz, and Jarosław Stepaniuk. "Fuzzy Rough Entropy Clustering Algorithm Parametrization." In Man-Machine Interactions, 239–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-00563-3_24.

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Douady, Adrien. "Topological Entropy of Unimodal Maps." In Real and Complex Dynamical Systems, 65–87. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8439-5_4.

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Li, Zhiqiang. "The Measure of Maximal Entropy." In Ergodic Theory of Expanding Thurston Maps, 37–77. Paris: Atlantis Press, 2017. http://dx.doi.org/10.2991/978-94-6239-174-1_4.

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Charter, M. K. "Drug Absorption in Man, and its Measurement by MaxEnt." In Maximum Entropy and Bayesian Methods, 325–39. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0683-9_20.

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Conference papers on the topic "Entropy map"

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Hong, Junping, and Wai Chan. "Entropy Map Might Be Chaotic." In 6th International Conference on Complexity, Future Information Systems and Risk. SCITEPRESS - Science and Technology Publications, 2021. http://dx.doi.org/10.5220/0010469700860090.

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Lee, Seongsoo, and Gwanggil Jeon. "Entropy Map Generation for Image Enhancement." In Multimedia, Computer Graphics and Broadcasting 2015. Science & Engineering Research Support soCiety, 2015. http://dx.doi.org/10.14257/astl.2015.117.36.

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Itoh, Mitsuhiro, and Hiroyasu Satoh. "Fisher information geometry of the barycenter map." In BAYESIAN INFERENCE AND MAXIMUM ENTROPY METHODS IN SCIENCE AND ENGINEERING (MAXENT 2014). AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4905967.

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Walsh, John MacLaren, and Alexander Erick Trofimoff. "On Designing Probabilistic Supports to Map the Entropy Region." In 2019 IEEE Information Theory Workshop (ITW). IEEE, 2019. http://dx.doi.org/10.1109/itw44776.2019.8989076.

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Sahu, Beeren, Pankaj K. Sa, and Banshidhar Majhi. "Salient Keypoint Detection using Entropy Map for Iris Biometric." In the 2nd International Conference. New York, New York, USA: ACM Press, 2015. http://dx.doi.org/10.1145/2708463.2709052.

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Feng, Xiaoling, Huihui Bai, and Yao Zhao. "Block-Level Entropy-Based Adaptive Sampling Framework for Depth Map." In 2017 IEEE Third International Conference on Multimedia Big Data (BigMM). IEEE, 2017. http://dx.doi.org/10.1109/bigmm.2017.18.

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Xiaoting Zhang and Zhan Song. "An adaptive grid-point detector by exploiting local entropy map." In 2010 3rd IEEE International Conference on Computer Science and Information Technology (ICCSIT 2010). IEEE, 2010. http://dx.doi.org/10.1109/iccsit.2010.5564126.

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Chen, Minjie, Mantao Xu, and Pasi Franti. "Optimized Entropy-constrained Vector Quantization of lossy Vector Map Compression." In 2010 20th International Conference on Pattern Recognition (ICPR). IEEE, 2010. http://dx.doi.org/10.1109/icpr.2010.182.

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Sutter, David, Marco Tomamichel, and Aram W. Harrow. "Strengthened monotonicity of relative entropy via pinched Petz recovery map." In 2016 IEEE International Symposium on Information Theory (ISIT). IEEE, 2016. http://dx.doi.org/10.1109/isit.2016.7541401.

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Rady, Sherine, Achim Wagner, and Essameddin Badreddin. "Hierarchical localization using entropy-based feature map and triangulation techniques." In 2010 IEEE International Conference on Systems, Man and Cybernetics - SMC. IEEE, 2010. http://dx.doi.org/10.1109/icsmc.2010.5642024.

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Reports on the topic "Entropy map"

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Berney, Ernest, Naveen Ganesh, Andrew Ward, J. Newman, and John Rushing. Methodology for remote assessment of pavement distresses from point cloud analysis. Engineer Research and Development Center (U.S.), April 2021. http://dx.doi.org/10.21079/11681/40401.

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The ability to remotely assess road and airfield pavement condition is critical to dynamic basing, contingency deployment, convoy entry and sustainment, and post-attack reconnaissance. Current Army processes to evaluate surface condition are time-consuming and require Soldier presence. Recent developments in the area of photogrammetry and light detection and ranging (LiDAR) enable rapid generation of three-dimensional point cloud models of the pavement surface. Point clouds were generated from data collected on a series of asphalt, concrete, and unsurfaced pavements using ground- and aerial-based sensors. ERDC-developed algorithms automatically discretize the pavement surface into cross- and grid-based sections to identify physical surface distresses such as depressions, ruts, and cracks. Depressions can be sized from the point-to-point distances bounding each depression, and surface roughness is determined based on the point heights along a given cross section. Noted distresses are exported to a distress map file containing only the distress points and their locations for later visualization and quality control along with classification and quantification. Further research and automation into point cloud analysis is ongoing with the goal of enabling Soldiers with limited training the capability to rapidly assess pavement surface condition from a remote platform.
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DiGrande, Laura, Sue Pedrazzani, Elizabeth Kinyara, Melanie Hymes, Shawn Karns, Donna Rhodes, and Alanna Moshfegh. Field Interviewer– Administered Dietary Recalls in Participants’ Homes: A Feasibility Study Using the US Department of Agriculture’s Automated Multiple-Pass Method. RTI Press, May 2021. http://dx.doi.org/10.3768/rtipress.2021.mr.0045.2105.

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Objective: The purpose of this study was to assess the feasibility of administering the Automated Multiple-Pass Method (AMPM), a widely used tool for collecting 24-hour dietary recalls, in participants’ homes by field interviewers. Design: The design included computer-assisted personal interviews led by either a nutritionist (standard) or field interviewer. Portion estimators tested were a set of three-dimensional food models (standard), a two-dimensional food model booklet, or a tablet with digital images rendered via augmented reality. Setting: Residences in central North Carolina. Participants: English-speaking adults. Pregnant women and individuals who were fasting were excluded. Results: Among 133 interviews, most took place in living rooms (52%) or kitchens (22%). Mean interview time was 40 minutes (range 13–90), with no difference by interviewer type or portion estimator, although timing for nutritionist-led interviews declined significantly over the study period. Forty-five percent of participants referenced items from their homes to facilitate recall and portion estimation. Data entry and post-interview coding was evaluated and determined to be consistent with requirements for the National Health and Nutrition Examination Survey. Values for the number of food items consumed, food groups, energy intake (average of 3,011 kcal for men and 2,105 kcal for women), and key nutrients were determined to be plausible and within reasonably expected ranges regardless of interviewer type or portion estimator used. Conclusions: AMPM dietary recall interviews conducted in the home are feasible and may be preferable to clinical administration because of comfort and the opportunity for participants to access home items for recall. AMPMs administered by field interviewers using the food model booklet produced credible nutrition data that was comparable to AMPMs administered by nutritionists. Training field interviewers in dietary recall and conducting home interviews may be sensible choices for nutrition studies when response rates and cost are concerns.
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Al-Qadi, Imad, Egemen Okte, Aravind Ramakrishnan, Qingwen Zhou, and Watheq Sayeh. Truck-Platoonable Pavement Sections in Illinois’ Network. Illinois Center for Transportation, February 2021. http://dx.doi.org/10.36501/0197-9191/21-002.

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Truck platooning has many benefits over traditional truck mobility. Literature shows that platooning improves safety and reduces fuel consumption between 5% and 15% based on platoon configuration. In Illinois, trucks carry more than 50% of freight tonnage and constitute 25% of the traffic on interstates. Deployment of truck platooning within interstate highways would result in significant fuel savings, but may have a direct impact on flexible pavement performance. The channelization of the platoon and reduced rest time between consecutive loads would accelerate the damage accumulation at the channelized position. Ultimately, this would lead to pavement service life reduction and a subsequent increase in maintenance and rehabilitation costs. Therefore, the main objective of this project is to quantify the effects of platooning on flexible pavements and provide guidelines for the state of Illinois by considering the aforementioned factors. Although the benefits of platooning are quantifiable, not every truck route is platoonable. For efficient platooning, trucks need to travel at a constant high speed for extended distances. The integrity of the platoon should be preserved because interfering vehicles would compromise the platooning benefits and road safety. An introduced high-level approach considers the volume/capacity of a roadway and the expected number of highway exit and entry conflicts. Using these parameters, each roadway section is assigned a level of platoonability, ranging from one to five—with five being the highest. A framework was developed to analyze the Illinois highway network. It was found that 89% of the network highway is platoonable under average capacity conditions.
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Free entry for leisure centres may increase physical activity across all social groups. National Institute for Health Research, February 2018. http://dx.doi.org/10.3310/signal-000560.

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