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Dissertations / Theses on the topic 'Entropy methods'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Kim, Sangil. "Ensemble Filtering Methods for Nonlinear Dynamics." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1101%5F1%5Fm.pdf&type=application/pdf.

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Hughes, Leslie Peter. "Maximum entropy methods applied to NMR and mass spectrometry." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/3785/.

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Maximum Entropy data processing techniques have been widely available for use by NMR spectroscopisis and mass spectrometrisls since they were first reported as a tool for enhancing damaged images. However, the techniques have been met with a certain amount of scepticism amongst the spectroscopic community; not least their apparent ability to get something for nothing. The aim of the work presented in this thesis is to demonstrate that if these techniques are used carefully and in appropriate situations a great deal of information can be extracted from both NMR and mass spectra. This has been a

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Basile, Chiara <1982&gt. "Entropy and Semantics: Textual Information Extraction through Statistical Methods." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/3224/1/Basile_Chiara_tesi.pdf.

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Basile, Chiara <1982&gt. "Entropy and Semantics: Textual Information Extraction through Statistical Methods." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/3224/.

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Von, Lorne von Saint Ange Chantel. "Integration of ranking and selection methods with the multi-objective optimisation cross-entropy method." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97072.

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Thesis (MEng)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: A method for multi-objective optimisation using the cross-entropy method (MOO CEM) was recently developed by Bekker & Aldrich (2010) and Bekker (2012). The method aims to identify the nondominated solutions of multi-objective problems, which are often dynamic and stochastic. The method does not use a statistical ranking and selection technique to account for the stochastic nature of the problems it solves. The research in this thesis aims to investigate possible techniques that can be incorporated into the MOO CEM. The

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Straka, Mika Julian. "Entropy-based methods for the statistical validation of bipartite networks." Thesis, IMT Alti Studi Lucca, 2018. http://e-theses.imtlucca.it/253/1/Straka_phdthesis.pdf.

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Bipartite networks provide an insightful representation of many complex systems, ranging from mutualistic species interactions in ecology to financial investment portfolios of banks. In order to unveil genuine properties of real-world structures, statistical comparisons with appropriately defined null models are necessary. Among other frameworks, entropy-based null models have proven to perform satisfactorily in providing benchmarks for testing evidence-based hypotheses, showing the desirable feature that the resulting graph probability distributions are generally unbiased and often a

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Parisi, Federica. "Entropy-based methods to tackle missing information in complex networks." Thesis, IMT Alti Studi Lucca, 2019. http://e-theses.imtlucca.it/269/1/Parisi_phdthesis.pdf.

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The work presented in this thesis focuses on an issue that very commonly arise when studying a network: missing information. There are many phenomena that can cause such a lack of knowledge, but prior to any attempt at studying the data, it is desirable to have a knowledge of the network at hand that is as complete as possible. Here I will address specifically two types of missing information problems, namely network reconstruction and link prediction. In the former case, the network structure is hidden, the only information we have access to is the size of the network and some aggrega

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8

Chan, Oscar. "Prosodic features for a maximum entropy language model." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0244.

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A statistical language model attempts to characterise the patterns present in a natural language as a probability distribution defined over word sequences. Typically, they are trained using word co-occurrence statistics from a large sample of text. In some language modelling applications, such as automatic speech recognition (ASR), the availability of acoustic data provides an additional source of knowledge. This contains, amongst other things, the melodic and rhythmic aspects of speech referred to as prosody. Although prosody has been found to be an important factor in human speech recognitio

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Tate, Graeme. "New methods in protein X-ray crystallography using maximum entropy techniques." Thesis, University of Glasgow, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396507.

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Johnson, Jason K. (Jason Kyle). "Convex relaxation methods for graphical models : Lagrangian and maximum entropy approaches." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45871.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.<br>Includes bibliographical references (p. 241-257).<br>Graphical models provide compact representations of complex probability distributions of many random variables through a collection of potential functions defined on small subsets of these variables. This representation is defined with respect to a graph in which nodes represent random variables and edges represent the interactions among those random variables. Graphical models provide a powerful and flexible approach to man

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Kendall, Elizabeth Ann Caughey Thomas Kirk. "Range dependent signals and maximum entropy methods for underwater acoustic tomography /." Diss., Pasadena, Calif. : California Institute of Technology, 1985. http://resolver.caltech.edu/CaltechETD:etd-04092008-080843.

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12

Pachas, Erik W. "Probabilistic Methods In Information Theory." CSUSB ScholarWorks, 2016. https://scholarworks.lib.csusb.edu/etd/407.

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Given a probability space, we analyze the uncertainty, that is, the amount of information of a finite system, by studying the entropy of the system. We also extend the concept of entropy to a dynamical system by introducing a measure preserving transformation on a probability space. After showing some theorems and applications of entropy theory, we study the concept of ergodicity, which helps us to further analyze the information of the system.

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13

Repper-Day, Christopher. "Mapping dynamic brain connectivity using EEG, TMS, and Transfer Entropy." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/mapping-dynamic-brain-connectivity-using-eeg-tms-and-transfer-entropy(27a55697-1b4f-40e0-8d07-0a53d3e67a24).html.

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To understand how the brain functions, we must investigate the transient interactions that underpin communication between cortical regions. EEG possesses the optimal temporal resolution to capture functional connectivity, but it lacks the spatial resolution to identify the cortical locations responsible. To circumvent this problem electrophysiological connectivity should be investigated at the source level. There are many quantifiers of connectivity applied to EEG data, but some are not sensitive to the direct, or indirect, influence of one region over another, and others require the specifica

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14

Berrett, Thomas Benjamin. "Modern k-nearest neighbour methods in entropy estimation, independence testing and classification." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267832.

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Nearest neighbour methods are a classical approach in nonparametric statistics. The k-nearest neighbour classifier can be traced back to the seminal work of Fix and Hodges (1951) and they also enjoy popularity in many other problems including density estimation and regression. In this thesis we study their use in three different situations, providing new theoretical results on the performance of commonly-used nearest neighbour methods and proposing new procedures that are shown to outperform these existing methods in certain settings. The first problem we discuss is that of entropy estimation.

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Tran, Huong Thi. "Framework to Evaluate Entropy Based Data Fusion Methods in Supply Chain Management." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc955034/.

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This dissertation explores data fusion methodology to deduce an overall inference from the data gathered from multiple heterogeneous sources. Typically, if there existed a data source in which the data were reliable and unbiased, then data fusion would not be necessary. Data fusion methodology combines data form multiple diverse sources so that the desired information - such as the population mean - is improved despite redundancies, inaccuracies, biases, and inflated variability in the data. Examples of data fusion include estimating average demand from similar sources, and integrating fata

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FURUHASHI, Takeshi, and Makoto YASUDA. "Fuzzy Entropy Based Fuzzy c-Means Clustering with Deterministic and Simulated Annealing Methods." Institute of Electronics, Information and Communication Engineers, 2009. http://hdl.handle.net/2237/15060.

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Yassin-Kassab, Abdullah. "Entropy-based inference and calibration methods for civil engineering system models under uncertainty." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367272.

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Macdonald, Ruaridh (Ruaridh R. ). "Investigation of improved methods for assessing convergence of models in MCNP using Shannon entropy." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/76954.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2012.<br>"June 2012." Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 42).<br>Monte Carlo computationals methods are widely used in academia to analyze nuclear systems design and operation because of their high accuracy and the relative ease of use in comparison to deterministic methods. However, current Monte Carlo codes require an extensive knowledge of the physics of a problem as well as the computational methods being used in order to ensure accuracy. This invest

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Chandrasekaran, Venkat. "Modeling and estimation in Gaussian graphical models : maximum-entropy methods and walk-sum analysis." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40521.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.<br>Includes bibliographical references (leaves 81-86).<br>Graphical models provide a powerful formalism for statistical signal processing. Due to their sophisticated modeling capabilities, they have found applications in a variety of fields such as computer vision, image processing, and distributed sensor networks. In this thesis we study two central signal processing problems involving Gaussian graphical models, namely modeling and estimation. The modeling problem involves learnin

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Bruno, Matteo. "Maximum entropy methods for the statistical analysis of bipartite networks: fast computation and applications." Thesis, IMT Alti Studi Lucca, 2021. http://e-theses.imtlucca.it/338/1/Bruno_phdthesis.pdf.

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Many real systems can be represented as networks, and their study can unveil hidden information and provide an extra insight to our understanding of the systems. However, finding the right model for a system is a challenging and fundamental task, as the use of a biased or approximated model can lead to wrongful conclusions. In this thesis we focus on maximum entropy network models. In particular, we focus on bipartite networks, that are networks in which there are two types of nodes and interactions are allowed only between two nodes of different type. In the first part of the thesis,

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21

Snoswell, Aaron, Nan Ye, and Surya Singh. "Modelling and explaining behaviour with Inverse Reinforcement Learning: Maximum Entropy and Multiple Intent methods." Thesis, University of Queensland, 2022.

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Many behaviours can be understood as a sequence of rational, goal-directed actions, and inferring goals behind observed actions over time is a fundamental but challenging problem in fields including computational biology, econometrics, control theory and robotics. <br/><br/>The IRL approach to this problem attempts to rationalise observed sequential decision-making behaviour by finding the reward function(s) being optimised. This thesis presents some new theories and algorithms for Single-Intent and Multiple-Intent IRL, with applications to two challenging real-world problems: driver behaviour

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Jones, Jonathan A. "Nuclear magnetic resonance data processing methods." Thesis, University of Oxford, 1992. http://ora.ox.ac.uk/objects/uuid:7df97c9a-4e65-4c10-83eb-dfaccfdccefe.

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This thesis describes the application of a wide variety of data processing methods, in particular the Maximum Entropy Method (MEM), to data from Nuclear Magnetic Resonance (NMR) experiments. Chapter 1 provides a brief introduction to NMR and to data processing, which is developed in chapter 2. NMR is described in terms of the classical model due to Bloch, and the principles of conventional (Fourier transform) data processing developed. This is followed by a description of less conventional techniques. The MEM is derived on several grounds, and related to both Bayesian reasoning and Shannon inf

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23

Williams, Gloria S. "Entropy in Postmerger and Acquisition Integration from an Information Technology Perspective." ScholarWorks, 2011. https://scholarworks.waldenu.edu/dissertations/1038.

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Mergers and acquisitions have historically experienced failure rates from 50% to more than 80%. Successful integration of information technology (IT) systems can be the difference between postmerger success or failure. The purpose of this phenomenological study was to explore the entropy phenomenon during postmerger IT integration. To that end, a purposive sample of 14 midlevel and first-line managers in a manufacturing environment was interviewed to understand how the negative effects of entropy affect the ultimate success of the IT integration process. Using the theoretical framework of t

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Eliason, Ryan Lee. "Application of Convex Methods to Identification of Fuzzy Subpopulations." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2242.

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In large observational studies, data are often highly multivariate with many discrete and continuous variables measured on each observational unit. One often derives subpopulations to facilitate analysis. Traditional approaches suggest modeling such subpopulations with a compilation of interaction effects. However, when many interaction effects define each subpopulation, it becomes easier to model membership in a subpopulation rather than numerous interactions. In many cases, subjects are not complete members of a subpopulation but rather partial members of multiple subpopulations. Grade of Me

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Holle, Yannick Verfasser], Michael [Akademischer Betreuer] [Herty, Michael [Akademischer Betreuer] Westdickenberg, and Benedetto [Akademischer Betreuer] Piccoli. "Entropy methods for gas dynamics on networks / Yannick Holle ; Michael Herty, Michael Westdickenberg, Benedetto Piccoli." Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/1227447418/34.

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26

Fernández, Pablo. "Entropy-stable hybridized discontinuous Galerkin methods for large-eddy simulation of transitional and turbulent flows." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122496.

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Thesis: Ph. D. in Computational Science and Engineering, Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 109-212).<br>The use of computational fluid dynamics (CFD) in the aerospace industry is limited by the inability to accurately and reliably predict complex transitional and turbulent flows. This has become a major barrier to further reduce the costs, times and risks in the design process, further optimize designs, and further reduce fuel consumption and toxic emissi

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27

Wilkie, Kathleen P. "Mutual Information Based Methods to Localize Image Registration." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/1121.

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Modern medicine has become reliant on medical imaging. Multiple modalities, e. g. magnetic resonance imaging (MRI), computed tomography (CT), etc. , are used to provide as much information about the patient as possible. The problem of geometrically aligning the resulting images is called image registration. Mutual information, an information theoretic similarity measure, allows for automated intermodal image registration algorithms. <br /><br /> In applications such as cancer therapy, diagnosticians are more concerned with the alignment of images over a region of interest such

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28

Spinney, R. E. "The use of stochastic methods to explore the thermal equilibrium distribution and define entropy production out of equilibrium." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1380947/.

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This thesis contains two separate bodies of research, both in terms of the period of time in which the work was done and their content, and as such is presented in two parts each of which are summarised below. The first part concerns work on entropy production in stochastic systems and describes the breakage of time reversal symmetry that arises in irreversible stochastic processes that one can associate with an entropy production contribution for a single realisation. The paradigm utilised is that of Markovian dynamics expressed using master equations and stochastic differential equations. By

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Ekström, Magnus. "Maximum spacing methods and limit theorems for statistics based on spacings." Doctoral thesis, Umeå universitet, Matematisk statistik, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-85176.

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The maximum spacing (MSP) method, introduced by Cheng and Amin (1983) and independently by Ranneby (1984), is a general estimation method for continuous univariate distributions. The MSP method, which is closely related to the maximum likelihood (ML) method, can be derived from an approximation based on simple spacings of the Kullback-Leibler information. It is known to give consistent and asymptotically efficient estimates under general conditions and works also in situations where the ML method fails, e.g. for the three parameter Weibull model. In this thesis it is proved under general condi

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Enqvist, Per. "Spectral Estimation by Geometric, Topological and Optimization Methods." Doctoral thesis, Stockholm, 2001. http://media.lib.kth.se:8080/kthdisseng.html.

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Aich, Sudipto. "Evaluation of Driver Performance While Making Unprotected Intersection Turns Utilizing Naturalistic Data Integration Methods." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/76892.

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Within the set of all vehicle crashes that occur annually, of intersection-related crashes are over-represented. The research conducted here uses an empirical approach to study driver behavior at intersections, in a naturalistic paradigm. A data-mining algorithm was used to aggregate the data from two different naturalistic databases to obtain instances of unprotected turns at the same intersection. Several dependent variables were analyzed which included visual entropy, mean-duration of glances to locations in the driver's view, gap-acceptance/rejection time. Kinematic dependent variables inc

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Heywood, Ben. "Investigations into the use of quantified Bayesian maximum entropy methods to generate improved distribution maps and biomass estimates from fisheries acoustic survey data /." St Andrews, 2008. http://hdl.handle.net/10023/512.

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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

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34

Friedrich, Lucas [Verfasser], Gregor [Gutachter] Gassner, and Thomas [Gutachter] Sonar. "Entropy Stable Summation-by-Parts Methods for Hyperbolic Conservation Laws on h/p Non-Conforming Meshes / Lucas Friedrich ; Gutachter: Gregor Gassner, Thomas Sonar." Köln : Universitäts- und Stadtbibliothek Köln, 2019. http://d-nb.info/1179910567/34.

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Eloundou, José. "Modélisation multi-contraintes d'un système de production flexible." Thesis, Rouen, INSA, 2016. http://www.theses.fr/2016ISAM0012/document.

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Les ateliers flexibles représentent pour les industriels un réel atout face à la concurrence et à l'imprévisibilité du marché. La mise en place et la gestion de ces catégories d'ateliers de production est souvent complexe, difficile et coûteuse. Ce travail de thèse, propose un outil d'aide à la décision permettant d'accompagner les industriels dans l'acquisition et la gestion d'ateliers flexibles de production. Cet outil s'appuie sur un modèle de simulation basé sur les Réseaux de Pétri Colorés Hiérarchiques. En effet, la simulation permet d'observer les variations des paramètres du système et

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Cure, Vellojin Laila Nadime. "Analytical Methods to Support Risk Identification and Analysis in Healthcare Systems." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3054.

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Healthcare systems require continuous monitoring of risk to prevent adverse events. Risk analysis is a time consuming activity that depends on the background of analysts and available data. Patient safety data is often incomplete and biased. This research proposes systematic approaches to monitor risk in healthcare using available patient safety data. The methodologies combine traditional healthcare risk analysis methods with safety theory concepts, in an innovative manner, to allocate available evidence to potential risk sources throughout the system. We propose the use of data mining to anal

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Tomaras, Panagiotis J. "Decomposition of general queueing network models : an investigation into the implementation of hierarchical decomposition schemes of general closed queueing network models using the principle of minimum relative entropy subject to fully decomposable constraints." Thesis, University of Bradford, 1989. http://hdl.handle.net/10454/4212.

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Decomposition methods based on the hierarchical partitioning of the state space of queueing network models offer powerful evaluation tools for the performance analysis of computer systems and communication networks. These methods being conventionally implemented capture the exact solution of separable queueing network models but their credibility differs when applied to general queueing networks. This thesis provides a universal information theoretic framework for the implementation of hierarchical decomposition schemes, based on the principle of minimum relative entropy given fully decomposab

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Cousin, Jean. "Prédiction des distributions granulométriques par le formalisme d'entropie maximum. Applications à plusieurs injecteurs mécaniques." Rouen, 1996. http://www.theses.fr/1996ROUES037.

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Les systèmes liquides produits par les injecteurs mécaniques sont par nature instables. Ceci a pour effet de rompre le système liquide en un spray, c'est à dire en un ensemble de gouttes. Ces gouttes se caractérisent alors par leur dispersion en taille, en vitesse voire en température. Le travail présenté ici ne traite que de la dispersion en taille des particules sphériques. Les phénomènes qui régissent la rupture des systèmes liquides en gouttes restent jusqu'à maintenant mal connus et ne sont pas complètement traités. Les quelques modèles existant ne permettent la prédiction que d'un nombre

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Юхименко, Микола Петрович, Николай Петрович Юхименко та Mykola Petrovych Yukhymenko. "Ентропійні методи опису технологічних процесів в апаратах завислого шару". Thesis, Вид-во СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/5796.

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Одним зі шляхів підвищення інтенсивності технологічних процесів є здійснення їх в активному аеродинамічному режимі – завислому шарі. Розробку і впровадження апаратів із завислим шаром на багатьох виробництвах стримує відсутність надійних розрахункових залежностей. Одержання останніх можливе при використанні ентропійних методів до опису складних процесів, що протікають при зважуванні і переносі турбулентним потоком газу частинок зернистого матеріалу. При цитуванні документа, використовуйте посилання http://essuir.sumdu.edu.ua/handle/123456789/5796

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Taylor, Jonathan W. "An experimental investigation of the lattice-magnetism interactions in rare earth and transition metal compounds." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/13758.

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The interaction between magnetism and the nuclear lattice is investigated experimentally, using thermal expansion, magnetostriction, specific heat, magnetisation and neutron scattering measurements. Both localised moment systems, as represented by the rare earth compounds Tb2Agln, Pd2Gdln and Cu2Gdln, as well as transition metal compounds, Ni2MnGa and V20 3 have been characterised at low temperatures. Measurements of the lattice properties are important due to the intrinsic coupling of magnetic degrees of freedom to them. The response of the lattice to magnetic order, and also to applied magne

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Pacilio, Costantino. "Classical and quantum aspects of black hole dynamics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7532/.

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Il contenuto fisico della Relatività Generale è espresso dal Principio di Equivalenza, che sancisce l'equivalenza di geometria e gravitazione. La teoria predice l'esistenza dei buchi neri, i più semplici oggetti macroscopici esistenti in natura: essi sono infatti descritti da pochi parametri, le cui variazioni obbediscono a leggi analoghe a quelle della termodinamica. La termodinamica dei buchi neri è posta su basi solide dalla meccanica quantistica, mediante il fenomeno noto come radiazione di Hawking. Questi risultati gettano una luce su una possibile teoria quantistica della gravitazione, m

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Jobic, Yann. "Numerical approach by kinetic methods of transport phenomena in heterogeneous media." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4723/document.

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Les phénomènes de transport en milieux poreux sont étudiés depuis près de deux siècles, cependant les travaux concernant les milieux fortement poreux sont encore relativement peu nombreux. Les modèles couramment utilisés pour les poreux classiques (lits de grains par exemple) sont peu applicables pour les milieux fortement poreux (les mousses par exemple), un certain nombre d’études ont été entreprises pour combler ce manque. Néanmoins, les résultats expérimentaux et numériques caractérisant les pertes de charge dans les mousses sont fortement dispersés. Du fait des progrès de l’imagerie 3D, u

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SOUZA, Márcio Rodrigo de Araújo. "Simulação Numérica de Escoamento Bifásico em reservatório de Petróleo Heterogêneos e Anisotrópicos utilizando um Método de Volumes Finitos “Verdadeiramente” Multidimensional com Aproximação de Alta Ordem." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/17248.

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Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2016-07-01T15:05:14Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Souza_Tese_2015_09_22.pdf: 8187999 bytes, checksum: 664629aed28d692dce410fefbfe793dc (MD5)<br>Made available in DSpace on 2016-07-01T15:05:14Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Souza_Tese_2015_09_22.pdf: 8187999 bytes, checksum: 664629aed28d692dce410fefbfe793dc (MD5) Previous issue date: 2015-09-22<br>Anp<br>Sob certas hipóteses simplificad

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Einav, Amit. "Two problems in mathematical physics: Villani's conjecture and trace inequality for the fractional Laplacian." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42788.

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The presented work deals with two distinct problems in the field of Mathematical Physics. The first part is dedicated to an 'almost' solution of Villani's conjecture, a known conjecture related to a Statistical Mechanics model invented by Kac in 1956, giving a rigorous explanation of some simple cases of the Boltzmann equation. In 2003 Villani conjectured that the time it will take the system of particles in Kac's model to equilibrate is proportional to the number of particles in the system. Our main result in this part is a proof, up to an epsilon, of that conjecture, showing that for all pra

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Bylin, Johan. "Best practice of extracting magnetocaloric properties in magnetic simulations." Thesis, Uppsala universitet, Materialteori, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388356.

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In this thesis, a numerical study of simulating and computing the magnetocaloric properties of magnetic materials is presented. The main objective was to deduce the optimal procedure to obtain the isothermal change in entropy of magnetic systems, by evaluating two different formulas of entropy extraction, one relying on the magnetization of the material and the other on the magnet's heat capacity. The magnetic systems were simulated using two different Monte Carlo algorithms, the Metropolis and Wang-Landau procedures. The two entropy methods proved to be comparably similar to one another. Both

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Carvalho, André Izecson de. "A design method based in entropy statistics." Instituto Tecnológico de Aeronáutica, 2008. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=1169.

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Desde o início da história da aviação, cada nova aeronave é criada para que seja mais econômica, mais rápida, mais leve, melhor do que as que a antecederam. Compreender a evolução tecnológica da aviação é extremamente útil quando se deseja projetar uma nova aeronave. Saviotti (1984) e, posteriormente, Frenken (1997) propuseram um método de análise da evolução tecnológica de aeronaves. Esse método, baseado em conceitos de teoria da informação desenvolvidos por Shannon (1948), especialmente o conceito de entropia estatística, se mostrou bastante eficaz. O método, porém, é essencialmente uma ferr

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Sun, Jiannhwa. "The NEO binary entropy coding method and system /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2004. http://uclibs.org/PID/11984.

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Wu, Nailong. "The maximum entropy method and its application in radio astronomy." Thesis, The University of Sydney, 1985. https://hdl.handle.net/2123/27440.

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This thesis consists of seven chapters, two appendices and a bibliography. In addition, three publications are included. The first digit in the page numbers refers to the chapter or appendix, and the second one or two digits are the serial numbers of the page in the chapter or appendix. For equations, figures and tables, the first digit and the second one or two digits refer respectively to the chapter and section; the third one or two digits refer to its serial occurrence in the chapter. The references in the bibliography are listed in alphabetical order by the author. Mathematical symbols ar

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Fellman, Laura Suzanne. "The Genetic Algorithm and Maximum Entropy Dice." PDXScholar, 1996. https://pdxscholar.library.pdx.edu/open_access_etds/5247.

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The Brandeis dice problem, originally introduced in 1962 by Jaynes as an illustration of the principle of maximum entropy, was solved using the genetic algorithm, and the resulting solution was compared with that obtained analytically. The effect of varying the genetic algorithm parameters was observed, and the optimum values for population size, mutation rate, and mutation interval were determined for this problem. The optimum genetic algorithm program was then compared to a completely random method of search and optimization. Finally, the genetic algorithm approach was extended to several va

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Armstrong, Nicholas. "Application of the maximum entropy method to x-ray profile analysis /." Electronic version, 1999. http://adt.lib.uts.edu.au/public/adt-NTSM20031204.135221/index.html.

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