Rozprawy doktorskie na temat „Entropy analysis”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 50 najlepszych rozpraw doktorskich naukowych na temat „Entropy analysis”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.
Patterson, Brett Alexander. "Maximum entropy data analysis". Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240969.
Pełny tekst źródłaPurahoo, K. "Maximum entropy data analysis". Thesis, Cranfield University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260038.
Pełny tekst źródłaKaramanos, Konstantinos. "Entropy analysis of nonequilibrium systems". Doctoral thesis, Universite Libre de Bruxelles, 2002. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211390.
Pełny tekst źródłaSchwill, Stephan. "Entropy analysis of financial time series". Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/entropy-analysis-of-financial-time-series(7e0c84fe-5d0b-41bc-96c6-5e41ffa5b8fe).html.
Pełny tekst źródłaKrempa, Peter. "Analysis of Entropy Levels in the Entropy Pool of Random Number Generator". Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2013. http://www.nusl.cz/ntk/nusl-236179.
Pełny tekst źródłaRobinson, David Richard Terence. "Developments in maximum entropy data analysis". Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307063.
Pełny tekst źródłaMcLean, Andrew Lister. "Applications of maximum entropy data analysis". Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319161.
Pełny tekst źródłaGarvey, Jennie Hill. "Independent component analysis by entropy maximization (infomax)". Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Jun%5FGarvey.pdf.
Pełny tekst źródłaThesis Advisor(s): Frank E. Kragh. "June 2007." Includes bibliographical references (p. 103). Also available in print.
Gärtner, Joel. "Analysis of Entropy Usage in Random Number Generators". Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214567.
Pełny tekst źródłaKryptografiskt säkra slumptalsgeneratorer behöver ofta initialiseras med ett oförutsägbart frö. En annan lösning är att istället konstant ge slumptalsgeneratorer entropi. Detta gör det möjligt att garantera att det interna tillståndet i generatorn hålls oförutsägbart. I den här rapporten analyseras fyra sådana generatorer som matas med entropi. Dessutom presenteras olika sätt att skatta entropi och en ny skattningsmetod utvecklas för att användas till analysen av generatorerna. Den framtagna metoden för entropiskattning lyckas bra i tester och används för att analysera entropin i de olika generatorerna. Alla analyserade generatorer uppvisar beteenden som inte verkar optimala för generatorns funktionalitet. De flesta av de analyserade generatorerna verkar dock oftast säkra att använda.
Mujumdar, Anusha Pradeep. "Cross entropy-based analysis of spacecraft control systems". Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/28006.
Pełny tekst źródłaMaia, Maria de Lourdes Oliveira. "Sintese e otimização de sistemas de destilação utilizando a analise exergetica". [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267503.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica
Made available in DSpace on 2018-07-29T01:55:29Z (GMT). No. of bitstreams: 1 Maia_MariadeLourdesOliveira_D.pdf: 6396882 bytes, checksum: b0a06b7f265dff67b45f506f542329d9 (MD5) Previous issue date: 2001
Resumo: Sistemas de destilação são amplamente utilizados em indústrias químicas e petroquímicas. Uma desvantagem desses sistemas, no entanto, é o fato dos mesmos apresentarem um grande consumo de energia. Dessa forma, a identificação de parâmetros como: refluxo mínimo, condição térmica da alimentação, posição do estágio da alimentação, etc., são extremamente importantes tanto para o projeto de colunas de destilação isoladas, como também para o seqüenciamento de colunas de destilação com reduzido consumo de energia. Visando a redução do consumo de energia de processos, a análise exergética tem sido amplamente utilizada. Por meio do cálculo do conteúdo de exergia das correntes do processo, é possível ter-se uma idéia da degradação da energia ao longo do mesmo. A medida da qualidade da energia é a exergia. O objetivo da análise exergética de processos é identificar as fontes de irreversibilidade, ou perda de exergia, e também identificar as modificações no processo que podem levar à redução dessa perda. Como resultado tem-se um menor consumo de energia. Somente recentemente, no entanto, a análise exergética tem sido aplicada a processos químicos. Como exemplo tem-se a metodologia proposta por Zemp (1994) na qual a seqüência ótima de colunas de destilação é a identificada como sendo a que apresenta menor perda de exergia. Uma desvantagem dessa metodologia, no entanto, é que a condição térmica da alimentação é fixada em líquido saturado. Neste trabalho, a análise exergética é utilizada na síntese e otimização de sistemas de destilação. Numa primeira etapa, o conceito de perfil quase-reversível para a separação de misturas multicomponentes em colunas de destilação isoladas foi utilizado, juntamente com a análise exergética, para a otimização da condição térmica da alimentação. Os bons resultados obtidos para vários sistemas motivaram a continuação do estudo em direção ao sequenciamento de colunas de destilação. O objetivo foi o de investigar se a otimização da condição térmica pode reduzir ainda mais o consumo de energia da seqüência previamente identificada como ótima. Modificação na pressão de operação das colunas da seqüência, assim como a influência da composição da alimentação, também foram consideradas. V ários sistemas com diferentes número de componentes foram utilizados para testar a metodologia. No caso dos sistemas temários, ambas as opções de seqüência foram estudadas. Os resultados provaram que a otimização das colunas não modifica a seqüência identificada como ótima. De uma maneira geral, foi possível propor uma metodologia para a síntese e otimização de sistema de destilação sem a necessidade da simulação rigorosa das colunas. Como vantagem tem-se o fato de que problemas de convergência não aparecem e não há a necessidade de se determinar o estágio da alimentação à priori
Abstract: Distillation systems are widely used in chemical and petrochemical industries. The main drawback of these systems, however, is the fact that they are energy intensive processes. Therefore, there is a need of a methodology that allows for the synthesis of distillation systems that present low energy consumption. In this sense, the correct identification of parameters such as: minimum reflux, feed stage location, etc plays an important role. In order to reduce the energy consumption of processes, the exergy analysis has appeared as an efficient too1. By computing the exergy content of the process streams the design engineer can understand how the energy degrades throughout the processo Exergy is a measurement of the quality of the energy. The goal of the exergy analysis is to identify sources of exergy losses, and the most appropriate modifications that will 1ead to the decrease of process irreversibility. As a result, the energy requirement of the process is reduced. Only recently, however, exergy analysis has been applied to chemical processo The optimum distillation column sequence, for example, was identified as the one that presents the lowest value of the minimum exergy loss (Zemp, 1994). However, the feed thermal condition is fixed as saturated liquido. In this work, exergy analysis is applied to the synthesis and optimisation of distillation columns sequences. Firstly, the concept of near-reversible column profile, together with the exergy analysis, were used to optimise the feed thermal condition of the feed. Secondly, it was investigated if different feed thermal condition can further reduce the overall energy consumption of a sequence. Not only were considered changes in the feed condition but it was also analysed other modifications in the operational conditions of each column of the sequence. The influence of the composition of the feed was tested as well. Several systems with different number of components were used to test the methodology. For the temary systems both direct and indirect separation were analysed. Results have shown that the optimisation of the columns do not change the selected optimum sequence. Overall, the exergy analysis applied to distillation systems has shown to be a useful tool to the synthesis and optimisation of such separation systems. By using the proposed methodology there is no need to resort to the rigorous simulation of each column of the sequence. Therefore, convergence problems as well as the tedious trial-and-error procedure for the determination of the optimal feed tray location are avoided.
Doutorado
Sistemas de Processos Quimicos e Informatica
Doutor em Engenharia Química
Kobo, Nomkwezane Sanny. "Entropy analysis of a reactive variable viscosity channel flow". Thesis, [S.l. : s.n.], 2009. http://dk.cput.ac.za/cgi/viewcontent.cgi?article=1058&context=td_cput.
Pełny tekst źródłaJamasebi, Reza. "COMPUTATIONAL PHENOTYPE DERIVED FROM PHYSIOLOGICAL TIME SERIES: APPLICATION TO SLEEP DATA ANALYSIS". Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1220467153.
Pełny tekst źródłaUchimoto, Kiyotaka. "Maximum Entropy Models for Japanese Text Analysis and Generation". 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/147595.
Pełny tekst źródłaOrange, Nicholas Brian. "Transfer Entropy Analysis of the Interactions of Flying Bats". Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/53955.
Pełny tekst źródłaMaster of Science
Woodcock, Dan. "A novel entropy measure for analysis of the electrocardiogram". Thesis, Aston University, 2007. http://publications.aston.ac.uk/10681/.
Pełny tekst źródłaYi, Ju Y. "Definition and Construction of Entropy Satisfying Multiresolution Analysis (MRA)". DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/5057.
Pełny tekst źródłaArmstrong, 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.
Pełny tekst źródłaOkafor, Anthony. "Entropy based techniques with applications in data mining". [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0013113.
Pełny tekst źródłaSevil, Hakkı Erhan Özdemir Semahat. "On the predictabiliyt of time series by metric entropy/". [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezler/master/makinamuh/T000543.pdf.
Pełny tekst źródłaKeywords: Time series analysis, Nonlinear analysis, condition monitoring, fault prognosis, machine health. Includes bibliographical references (leaves 48-49).
Scafetta, Nicola. "An entropic approach to the analysis of time series". Thesis, University of North Texas, 2001. https://digital.library.unt.edu/ark:/67531/metadc3033/.
Pełny tekst źródłaNdaba, Cynthia Reitumetse. "Entropy analysis in a channel flow with temperature dependent viscosity". Thesis, University of Limpopo (Turfloop Campus), 2007. http://hdl.handle.net/10386/956.
Pełny tekst źródłaThe thermodynamic irreversibility in any fluid flow process can be quantified through entropy analysis. The first law of thermodynamics is simply an expression of the conservation of energy principle. The second law of thermodynamics states that all real processes are irreversible. Entropy generation is a measure of the account of irreversibility associated with the real processes. As entropy generation takes place, the quality of energy (i.e. exergy) decreases. In order to preserve the quality of energy in a fluid flow process or at least to reduce the entropy generation, it is important to study the distribution of the entropy generation within the fluid volume. In this dissertation, the inherent irreversibility in the flow of a variable viscosity fluid in both a closed channel and an open channel is investigated. The channel is assumed to be narrow, so that the lubrication approximation may be applied and the fluid viscosity is assumed to vary linearly with temperature. Both the lower and the upper surfaces of the channel are maintained at different temperature. The simplified form of governing equations is obtained and solved analytically using a perturbation technique. Expressions for fluid velocity and temperature are derived which essentially expedite to obtain expressions for volumetric entropy generation numbers, irreversibility distribution ratio and the Bejan number in the flow field. In chapter 1, a historic background of the study is highlighted. Both closed and open channels problem are investigated in chapters 2 and 3. In chapter 4, generally discussion on the overall results obtained from the investigation is displayed together with possible areas of future research work.
Kaffashi, Farhad. "Variability analysis & its applications to physiological time series data". online version, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1181072302.
Pełny tekst źródłaZvolinschi, Anita. "On exergy analysis and entropy production minimisation in industrial ecology". Doctoral thesis, Norwegian University of Science and Technology, Department of Chemistry, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1591.
Pełny tekst źródłaThe objective of this thesis is to improve the basis for applying industrial ecology to the evaluation of material and energy resource use and transformation in industrial systems. The underlying hypothesis was that when the second law of thermodynamics is applied it improves the basis for using industrial ecology for the evaluation of the use and transformation of resources in industrial systems. Exergy analysis and entropy production calculation and minimisation of industrial processes are used as methods for analysis.
El-Ladan, Sulaim. "Human entropy (HENT) - a new approach to human reliability analysis". Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=18990.
Pełny tekst źródłaKirsch, Matthew Robert. "Signal Processing Algorithms for Analysis of Categorical and Numerical Time Series: Application to Sleep Study Data". Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1278606480.
Pełny tekst źródłaZhang, Zheng. "A study of sample entropy towards process capability". Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/20480.
Pełny tekst źródłaIndustrial & Manufacturing Systems Engineering
Shing I. Chang
The process capability is a measurable property of a process related to the specification of a product. Traditionally, process capability analysis (PCA) measurements are expressed by a process capability ratio (PCR). When using a typical PCR to measure process capability, there are certain assumptions, and critics have been made towards PCR, that some the assumptions are violated. Much research has been conducted to ratify the situations when some of the assumptions are violated. This thesis, is going to demonstrate a research towards process capability using Sample Entropy method. The desirable outcome would be that this method can avoid violating the assumptions.
Failla, Roberto. "Random growth of interfaces: Statistical analysis of single columns and detection of critical events". Thesis, University of North Texas, 2004. https://digital.library.unt.edu/ark:/67531/metadc4550/.
Pełny tekst źródłaRybokas, Mindaugas. "The information analysis and the research on entropy for measurement data". Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060928_151951-20485.
Pełny tekst źródłaDuomenų įverčiui išreikšti pritaikytas informacinės entropijos parametras pateiktoje rezultato išraiškoje yra papildytas rodikliu apie duomenų imtį, kuri buvo įvertinta iš visos šį objektą charakterizuojančių duomenų aibės. Sukurta modeliavimo sistema ir programinė įranga gali būti naudojama didelio skaičiaus nežinomųjų lygtims spręsti, o praktikoje naudojama rastrinių skalių matavimo duomenims apdoroti.
Samiei, Kasra. "Entropy analysis as a tool for optimal sustainable use of biorefineries". Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18679.
Pełny tekst źródłaUppsatsnivå: D
Eegunjobi, Adetatayo Samuel. "Analysis laminar flow, thermal stability, and entropy generation in porous channel". Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/1303.
Pełny tekst źródłaFluid flow through a porous channel and cylindrical pipe walls are important area of research due to its wide applications in transpiration cooling, gaseous diffusion technology, cooling of rocket, mechanized irrigation and filtration processes. It is therefore necessary to examine the effect of Navier slip, combined effects of buoyancy forces and variable viscosity on the entire flow structure. Analyzing the magneto- hydrodynamics (MHD) of unsteady flow with buoyancy effect and also investigate numerically the entropy generation in an unsteady flow through porous pipe. We have also examined the thermal stability and entropy generation in the system. The problems were investigated theoretically using appropriate mathematical models for both transient and steady state scenario. Both analytical techniques and numerical methods are employed to tackle the model nonlinear equations derived from the law of conservation of mass, momentum and energy balance. Some definitions of terms to come across and introduction to fluid flow are given in chapter 1, together with literature reviews, statement of problem and objectives of the study. Chapter 2 lays the foundation for basic fundamental equations governing fluid flow. In chapter 3, the combined effect of suction/injection and asymmetric Navier slip on the entropy generation rate for steady flow of an incompressible viscous fluid through a porous channel subjected to different temperature at the walls are investigated. Chapter 4 analyze combined effects of buoyancy forces together with Navier slip on the entropy generation in a vertical porous channel wall with suction/injection wall. Analysis of MHD unsteady flow through a porous pipe with buoyancy effects are carried out in chapter 5, while chapter 6 investigates numerically entropy generation of unsteady flow through a porous pipe with suction and chapter 7 gives concluding remarks.
Chatterjee, Shiladitya. "Applications of Pattern Recognition Entropy (PRE) and Informatics to Data Analysis". BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/8826.
Pełny tekst źródłaAmano, Kenichi. "Roles of Water Entropy in Functioning of ATP-Driven Proteins:Theoretical Analysis". Kyoto University, 2011. http://hdl.handle.net/2433/151906.
Pełny tekst źródłaJessop, Alan Thomas. "Multiattribute models for engineering evaluation". Thesis, Heriot-Watt University, 1999. http://hdl.handle.net/10399/1226.
Pełny tekst źródłaJoret, Gwenaël. "Entropy and stability in graphs". Doctoral thesis, Universite Libre de Bruxelles, 2007. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210605.
Pełny tekst źródłaLa thèse est divisée en deux parties, toutes deux liées à la notion de stables dans un graphe. Dans la première partie, nous étudions un problème de coloration de graphes, c'est à dire de partition en stables, où le but est de minimiser l'entropie de la partition. C'est une variante du problème classique de minimiser le nombre de couleurs utilisées. Nous considérons aussi une généralisation du problème aux couvertures d'ensembles. Ces deux problèmes sont appelés respectivement minimum entropy coloring et minimum entropy set cover, et sont motivés par diverses applications en théorie de l'information et en bioinformatique. Nous obtenons entre autres une caractérisation précise de la complexité de minimum entropy set cover :le problème peut être approximé à une constante lg e (environ 1.44) près, et il est NP-difficile de faire strictement mieux. Des résultats analogues sont prouvés concernant la complexité de minimum entropy coloring.
Dans la deuxième partie de la thèse, nous considérons les graphes dont le nombre de stabilité augmente dès qu'une arête est enlevée. Ces graphes sont dit être "alpha-critiques", et jouent un rôle important dans de nombreux domaines, comme la théorie extrémale des graphes ou la combinatoire polyédrique. Nous revisitons d'une part la théorie des graphes alpha-critiques, donnant à cette occasion de nouvelles démonstrations plus simples pour certains théorèmes centraux. D'autre part, nous étudions certaines facettes du polytope des ordres totaux qui peuvent être vues comme une généralisation de la notion de graphe alpha-critique. Nous étendons de nombreux résultats de la théorie des graphes alpha-critiques à cette famille de facettes.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Winter, Tyler Forrest. "Analysis of access-to-space missions utilizing on-board energy management and entropic analysis". Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Winter_09007dcc804d07b4.pdf.
Pełny tekst źródłaVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 18, 2008) Includes bibliographical references (p. 127-129).
Azami, Hamed. "Entropy-based nonlinear analysis for electrophysiological recordings of brain activity in Alzheimer's disease". Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31106.
Pełny tekst źródłaXAVIER, JÚNIOR Sílvio Fernando Alves. "Study of trend analysis and sample entropy of precipitation in Paraíba, Brazil". Universidade Federal Rural de Pernambuco, 2016. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4505.
Pełny tekst źródłaMade available in DSpace on 2016-05-24T12:22:51Z (GMT). No. of bitstreams: 1 Silvio Fernando Alves Xavier Junior.pdf: 3827505 bytes, checksum: 29921471e9b1870a11d0aabb0a3214bb (MD5) Previous issue date: 2016-03-22
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
No presente trabalho duas metodologias diferentes foram investigadas a fim de obter uma melhor compreensão dos fenômenos de chuva e suas consequências sobre uma região particular que sofre escassez de recursos hídricos. Em primeiro lugar, foram selecionados modelos de semivariogramas para determinar as tendências de precipitação mensal no Estado da Paraíba usando krigagem ordinária. A metodologia envolve a aplicação de interpolação geoestatística de registros de precipitação de 51 anos de 69 estações pluviométricas em todo o Estado. As análises de semivariogramas mostraram que a ocorrência da anisotropia durante meses específicos teve uma forte dependência espacial (Índice de Dependência Espacial - IDE < 25 %). As tendências foram submetidas aos seguintes modelos: Gaussian, rational quadratic, circular, esférico, pentaspherical, exponencial, KBessel e tetraspherical. Os modelos com o melhor ajuste foram selecionados pela validação cruzada e Índice de Comparação de Erros (ICE). Cada conjunto de dados apresentou uma estrutura de dependência espacial particular, o que tornou necessário definir modelos específicos de semivariogramas, a fim de melhorar o ajuste do semivariograma experimental. Além disso, o mapa de previsão de erro padronizado e Hot Spots foram obtidos com o objetivo de justificar os modelos escolhidos. Um sistema climático é um sistema nãolinear bastante complexo. Para descrever as características de complexidade das séries de precipitação na Paraíba, propomos o uso do Sample Entropy, um algoritmo baseado na entropia de Shannon, para medir a complexidade da série de precipitação. Quatro macro-regiões da Paraíba foram analisadas: Mata, Agreste, Borborema e Sertão. Os resultados das análises mostraram que as complexidades de precipitação mensal média têm diferenças nas macro-regiões. Sample Entropy pode refletir a mudança dinâmica da série de precipitação proporcionando uma nova maneira de investigar a complexidade das séries hidrológicas. A complexidade apresenta uma variação regional do sistema de recursos hídricos locais que podem influenciar a base para a utilização e desenvolvimento de recursos em áreas secas.
The objective of this work was to present two different methodologies in order to obtain a better comprehension of rainfall phenomena and its consequences over a particular region which suffers from water scarcity. Firstly, semivariogram models were selected to estimate trends in monthly precipitation in Paraíba State-Brazil using ordinary kriging. The methodology involves the application of geostatistical interpolation of precipitation records of 51 years from 69 rainfall stations across the state. Analysis of semivariograms showed that anisotropy for specific months had a strong spatial dependence (Index of Spatial Dependence - IDE <25%). The trends were subjected to the following models: circular, spherical, pentaspherical, exponential, Gaussian, rational quadratic, K-Bessel and tetraspherical. The models with the best fit were selected by cross-validation and Error Comparison Index (ECI). Each data set month had a particular spatial dependence structure, which made it necessary to define specific models of semivariograms in order to enhance the adjustment of the experimental semivariogram. Besides, the standardized error prediction map and hot spot analysis were obtained with the aim of justifying the chosen models. Furthermore, one can see that a climate system is a complex nonlinear system. To describe the complexity characteristics of precipitation series in Paraíba, we propose the use of sample entropy, a kind of entropy-based algorithm, to measure the complexity of precipitation series. The Paraíba’s four macro-regions: Mata, Agreste, Borborema, and Sertão were analyzed. Results of analysis show that complexities of monthly average precipitation have differences in the macro-regions. Sample entropy can reflect the dynamic change of precipitation series providing a new way to investigate the complexity of hydrological series. The complexity exhibits an areal variation of local water resources system which can influence the basis for utilizing and developing resources in dry areas.
Bhattacharjee, Abhishek. "Measuring Influence Across Social Media Platforms: Empirical Analysis Using Symbolic Transfer Entropy". Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7745.
Pełny tekst źródłaAssirati, Lucas. "Entropia aplicada ao reconhecimento de padrões em imagens". Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-24092014-104641/.
Pełny tekst źródłaThis work studies the use of entropy as a tool for pattern recognition in images. Entropy is a concept used in thermodynamics to measure the degree of organization of a system. However, this concept can be extended to other areas of knowledge. The adoption of the concept in information theory and, consequently, in pattern recognition was introduced by Shannon in the paper entitled \"A Mathematical Theory of Communication\", published in 1948. In this master thesis, the classical Boltzmann-Gibbs-Shannon entropy, the generalized Tsallis entropy and its variants (multi-scale analysis, multiple q index, and feature selection) are studied, applied to pattern recognition in images. Using well known databases, we performed comparative studies between the techniques. The results show that the Tsallis entropy, through multiscale analysis and multiple q index has a great advantage over the classical Boltzmann-Gibbs- Shannon entropy. Practical applications of this study are proposed in order to demonstrate the potential of the method.
Dourado, Jonas Rossi. "Delayed Transfer Entropy applied to Big Data". Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-19022019-134228/.
Pełny tekst źródłaA recente popularização de tecnologias como Smartphones, Wearables, Internet das Coisas, Redes Sociais e streaming de Video aumentou a criação de dados. A manipulação de grande quantidade de dados levou a criação do termo Big Data, muitas vezes definido como quando o volume, a taxa de aquisição ou a representação dos dados demanda abordagens não tradicionais para analisar ou requer uma escala horizontal para o processamento de dados. A análise é a etapa de Big Data mais importante, tendo como objetivo extrair informações relevantes e às vezes escondidas. Um exemplo de informação escondida é a causalidade, que pode ser inferida utilizando Delayed Transfer Entropy (DTE). Apesar do DTE ter uma grande aplicabilidade, ele possui uma grande demanda computacional, esta última, é agravada devido a grandes bases de dados como as encontradas em Big Data. Essa pesquisa otimizou e modificou o código existente para permitir a execução de DTE em um cluster de computadores. Com a tendência de Big Data em vista, esse resultado pode permitir bancos de dados maiores ou melhores evidências estatísticas.
Hagemann, Johannes Franz. "Computer aided process design : the design of a distillation train and its control system". Thesis, University of South Wales, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284891.
Pełny tekst źródłaGalletti, Michele. "Fully Polarimetric Analysis of Weather Radar Signatures". Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-201000174.
Pełny tekst źródłaThe present doctoral thesis deals with radar polarimetry, namely with the investigation of properties of polarimetric variables potentially useful in radar meteorology. For use with dual-polarization radars, the degree of polarization is analyzed. This variable is available to planned operational radars. The degree of polarization is dependent on transmit polarization state and, consequently, it is dependent on the radar system operating mode. The primary operating mode of operational radars consists in simultaneous transmission and simultaneous receive of both horizontal and vertical components. The secondary operating mode consists of horizontal transmission and simultaneous receive. Both degrees of polarization are investigated in this thesis. Also, as operational systems are being updated to dual-polarization, research should start investigating the capabilities of fully polarimetric weather radar systems. Among the numerous variables available from this operating mode, the target entropy was chosen for investigation, also because of its close relation to the degree of polarization
Li, Chang. "Complexity Analysis of Physiological Time Series with Applications to Neonatal Sleep Electroencephalogram Signals". Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1345657829.
Pełny tekst źródłaAmes, Allison Jennifer. "Monte Carlo Experiments on Maximum entropy Constructive Ensembles for Time Series Analysis and Inference". Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32571.
Pełny tekst źródłaMaster of Science
Herfert, Matthias [Verfasser]. "Nonparametric Inference of Utilites : Entropy Analysis with Applications to Consumer Theory / Matthias Herfert". Hamburg : Diplom.de, 2006. http://d-nb.info/1185646434/34.
Pełny tekst źródłaPadayachee, Jayanethie. "The application of Bayesian statistics and maximum entropy to Ion beam analysis techniques". Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/16143.
Pełny tekst źródłaThe elimination of some blurring property, such as the detector response function, from spectra has received a considerable amount of attention. The problem is usually complicated by the presence of noise in the data, and in general, there exists an infinite set of possible solutions which are consistent with the data within the bounds imposed by the noise. Such a problem is known, generally, as an ill-defined inverse problem. Many techniques have been developed in an attempt to solve inverse problems, for example the problem of deconvolution, but these techniques employ ad hoc modifications to solve different problems. Bayesian Statistics has been proved to be the only consistent method for solving inverse problems of the type where the information is expressed in terms of probability distributions. This dissertation presents results of applying the Bayesian formalism, together with the concepts of maximum information entropy and multiresolution pixons, to various inverse problems in ion beam analysis; The results of this method of deconvoluting Rutherford Backscattering Spectrometry (RBS) and Proton Induced X-ray Emission (PIXE) spectra are compared to the results from other deconvolution techniques, namely Fourier Transforms, Jansson's method and maximum entropy (MaxEnt) without pixons. All the deconvolution techniques show an improvement in the resolution of the RBS spectra but only the MaxEnt techniques show a significant improvement in the resolution of the PIXE spectra. The MaxEnt methods also produce physically acceptable results. The MaxEnt formalism was applied to the extraction of depth profiles from RBS and PIXE spectra and yielded good results. The technique was also used to deconvolute the beam profile from one-dimensional nuclear microprobe scans.
Weissmann, Gerhard. "An entropy field controls economics and the environment : the application of the concept of increase in entropy (based on an inferred entropy field) to the analysis of human economic behaviour and its environmental impact /". Title page, table of contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09ENV/09envw433.pdf.
Pełny tekst źródłaRaele, Ricardo. "O sistema sócio-ecológico do rio Pinheiros: um modelo conceitual baseado na Teoria de Sistemas e Stakeholders Analysis". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-13022014-082511/.
Pełny tekst źródłaThis research presents the construction of a conceptual model for the sustainability of the Pinheiros River in São Paulo City through the application of a method of mapping and analysis of variables in socio-ecological systems. The method is based both on the General Theory of Systems and on the Stakeholder Analysis and aims at the identification of relevant variables through a hierarchical and transdisciplinary approach. In this sense, specialists from different fields of expertise were consulted in order to identify the variables and to assign them importance levels. An adjacency matrix was developed so that connections amidst the variables could be identified. Two hypotheses were tested. The first - concerning the nonfortuitous distribution of the importance points assigned by the several specialists - was corroborated. The second - which postulated the superposition of the more important and more connected variables in a group formed by the quartile of the more important variables - was refuted. The first hypothesis was verified with the support of the non-parametric signal and binomial distribution test. The second hypothesis was verified through the simple majority calculation. Based on the results and with the help of a software able to model hierarchical and complex networks, a conceptual model of sustainability for the Pinheiros River was built.
Bagci, Gokhan Baris. "The Nonadditive Generalization of Klimontovich's S-Theorem for Open Systems and Boltzmann's Orthodes". Thesis, University of North Texas, 2008. https://digital.library.unt.edu/ark:/67531/metadc9124/.
Pełny tekst źródła