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Dissertations / Theses on the topic 'Fokker-Planck'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Adesina, Owolabi Abiona. "Statistical Modelling and the Fokker-Planck Equation." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1177.

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A stochastic process or sometimes called random process is the counterpart to a deterministic process in theory. A stochastic process is a random field, whose domain is a region of space, in other words, a random function whose arguments are drawn from a range of continuously changing values. In this case, Instead of dealing only with one possible 'reality' of how the process might evolve under time (as is the case, for example, for solutions of an ordinary differential equation), in a stochastic or random process there is some indeterminacy in its future evolution described by proba

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2

Madureira, Antonio Justino Ruas. "Balanceamento detalhado na equação de Fokker-Planck." [s.n.], 1988. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277216.

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Orientador: Vincent Buonomano<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-07-14T21:03:54Z (GMT). No. of bitstreams: 1 Madureira_AntonioJustinoRuas_M.pdf: 2317057 bytes, checksum: 5f319321bda35244f565adf6787dbca9 (MD5) Previous issue date: 1988<br>Resumo: Apresentaremos as condições de Balanceamento Detalhado (BD) para a equação de Fokker-Planck, e daremos dois exemplos de sistemas físicos em BD, ou seja, obteremos a distribuição de Boltzmann para partículas em movimento Browniano, e a largura de linha de

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McGowan, Alastair David. "Numerical studies of the Fokker-Planck equation." Thesis, University of St Andrews, 1992. http://hdl.handle.net/10023/13995.

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Jorna and Wood recently developed a program that numerically solved the Fokker-Planck equation in spherical geometry. In this thesis, we describe how the original program has been redeveloped to produce a program that is an order of magnitude quicker and that has superior energy and density conservation. The revised version of the program has been used to extend the work of Jorna and Wood on thermal conduction in laser produced plasmas. It has been shown that the effect of curvature on heat flow can be described from a purely geometrical argument and that for aspect ratios similar to those fou

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4

Santos, Saiara Fabiana Menezes dos. "Equação de Fokker-Planck para potenciais polinomiais /." São José do Rio Preto, 2018. http://hdl.handle.net/11449/166407.

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Orientador: Elso Drigo Filho<br>Resumo: Tem-se como objetivo estudar a relação da equação de Fokker-Planck mapeada em uma equação tipo Schrödinger e assim usar supersimetria para resolução de alguns potenciais polinomiais encontrando sua distribuição de probabilidade P(x,t) e o tempo de passagem entre barreiras de potenciais e a partir destes dados compreender melhor o sistema físico proposto.<br>Abstract: The objective of this work is to study the relationship Fokker-Planck equation a Schrödinger-type equation . Thus, it is used supersymmetry for is to solve some polynomial potential in order

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5

Fredriksson, Teodor. "Fokker Planck for the Cox-Ingersoll-Ross Model." Thesis, Uppsala universitet, Tillämpad matematik och statistik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-331149.

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6

Guillouzic, Steve. "Fokker-Planck approach to stochastic delay differential equations." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ58279.pdf.

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7

Polotto, Franciele [UNESP]. "Equação de Fokker-Planck e enovelamento de proteínas." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/127917.

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Made available in DSpace on 2015-09-17T15:26:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-05-28. Added 1 bitstream(s) on 2015-09-17T15:45:33Z : No. of bitstreams: 1 000844436.pdf: 518344 bytes, checksum: 1467cd8eda9bcf43e0b831551c0999d0 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>O presente trabalho objetiva explorar a relação entre a equação de Fokker-Planck e a equação de Schrödinger para estudar o processo de enovelamento de proteínas a partir de potenciais obtidos dos valores de energia livre que emergem de simulações computacionais. A dinâmica

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8

Polotto, Franciele. "Equação de Fokker-Planck e enovelamento de proteínas /." São José do Rio Preto, 2015. http://hdl.handle.net/11449/127917.

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Orientador: Elso Drigo Filho<br>Banca: Marco Antonio Alves da Silva<br>Banca: Ronaldo Junio de Oliveira<br>Banca: Sidney Jurado de Carvalho<br>Banca: Vitor Barbanti Pereira Leite<br>Resumo: O presente trabalho objetiva explorar a relação entre a equação de Fokker-Planck e a equação de Schrödinger para estudar o processo de enovelamento de proteínas a partir de potenciais obtidos dos valores de energia livre que emergem de simulações computacionais. A dinâmica do processo de enovelamento de proteínas é estudada a partir da evolução temporal das equações analisadas. A partir do estudo da distrib

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9

Cao, Chuqi. "Equations de Fokker-Planck cinétiques : hypocoercivité et hypoellipticité." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLED040.

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Cette thèse porte principalement sur l’hypocoercivité et le comportement à long terme d’équations cinétiques. Nous considérons d’abord l’équation cinétique de Fokker-Planck avec la force de confinement faible et une classe de force générale. Nous prouvons l’existence et l’unicité d’un équilibre normalisé positif (dans le cas d’une force générale) et établissons un certain taux exponentiel ou sous-géométrique de convergence vers l’équilibre (et le taux peut être explicitement calculé). Ensuite, nous étudions la convergence vers l’équilibre de la relaxation Boltzmann linéaire (également appelé B

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10

PARLETTE, EDWARD BRUCE. "GENERALIZED FUNCTION SOLUTIONS TO THE FOKKER-PLANCK EQUATION." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187933.

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In problems involving highly forward-peaked scattering, the Boltzmann transport equation can be simplified using the Fokker-Planck model. The purpose of this project was to develop an analytical solution to the resulting Fokker-Planck equation. This analytical solution can then be used to benchmark numerical transport codes. A numerical solution to the Fokker-Planck equation was also developed. The analytical solution found is a generalized function. It satisfies the purpose of the project with two limitations. The first limitation is that the solution can only be evaluated for certain sources

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11

Castro, Glaúcia Rosângela Peglow Borges de [UNESP]. "Equação de Fokker-Planck, supersimetria e enovelamento de proteína." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/100480.

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Made available in DSpace on 2014-06-11T19:30:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-10-31Bitstream added on 2014-06-13T18:41:05Z : No. of bitstreams: 1 castro_grpb_dr_sjrp.pdf: 1005126 bytes, checksum: 6a95db71dd7b9909e6062d9a618753c2 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Neste trabalho a equação de Schrödinger associada a equação de Fokker-Planck é estudada através do formalismo de supersimetria. O procedimento usado é buscar a função de onda através da determinação do superpotencial. Quando esta função não pode ser determinada exatamen

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Castro, Glaúcia Rosângela Peglow Borges de. "Equação de Fokker-Planck, supersimetria e enovelamento de proteína /." São José do Rio Preto : [s.n.], 2003. http://hdl.handle.net/11449/100480.

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Orientador : Elso Drigo Filho<br>Banca: Regina Maria Ricotta<br>Banca: Antonio Caliri<br>Banca: José Abdalla Helayël-Neto<br>Banca: Mário José de Oliveira<br>Resumo : Neste trabalho a equação de Schrödinger associada a equação de Fokker-Planck é estudada através do formalismo de supersimetria. O procedimento usado é buscar a função de onda através da determinação do superpotencial. Quando esta função não pode ser determinada exatamente, procuram-se soluções aproximadas que podem ser usadas no método variacional. Através do formalismo supersimétrico é possível construir uma hierarquia de Hamilt

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Huth, Robert. "On a Fokker–Planck equation coupled with a constraint." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2012. http://dx.doi.org/10.18452/16557.

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In dieser Arbeit untersuchen wir zwei Modelle, die das Laden und Entladen einer Lithium-Ionen Batterie beschreiben. Beide Modelle spiegeln eine Hysterese in dem Spannungs-Ladungs-Verlauf wider. Wir skizzieren den Modellierungsprozess von einem diskreten vielteilchen Modell sowie einem kontinuierlichen vielteilchen Modell. Das erste führt zu einer axiomatischen Beschreibung der Evolution makroskopischer Größen, während das zweite in eine nichtlineare Fokker-Planck Gleichung mündet. Wir zeigen die Existenz und Eindeutigkeit von Lösungen der nichtlinearen Fokker-Planck Gle

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TORREGROSSA, MARCO. "Modeling of socio-economic phenomena by Fokker-Planck Equations." Doctoral thesis, Università degli studi di Pavia, 2018. http://hdl.handle.net/11571/1228752.

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This thesis is centered on Fokker-Planck Equation and its appplication in Econophysics. Part I is devoted to the modeling of wealth distribution and it is based on this two works that were developed under the supervision of Professor G.Toscani: M. Torregrossa and G. Toscani. On a Fokker-Planck equation for wealth distribution. Kinet. Relat. Models, 11(2):337–355, 2018. M. Torregrossa and G. Toscani. Wealth distribution in presence of debts. A Fokker-Planck description. Commun. Math. Sci, 16(2):537–560, 2018. Within this Part, in Chapter 4, we study a Fokker- Planck equation with variable coeff

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Venkiteswaran, Gopalakrishnan. "A particle method for Fokker-Planck equations in high dimensions." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=967905125.

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Chen, Hua, Wei-Xi Li, and Chao-Jiang Xu. "Gevrey hypoellipticity for linear and non-linear Fokker-Planck equations." Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2009/3028/.

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Zhelezov, Gleb, and Gleb Zhelezov. "Coalescing Particle Systems and Applications to Nonlinear Fokker-Planck Equations." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/624562.

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We study a stochastic particle system with a logarithmically-singular inter-particle interaction potential which allows for inelastic particle collisions. We relate the squared Bessel process to the evolution of localized clusters of particles, and develop a numerical method capable of detecting collisions of many point particles without the use of pairwise computations, or very refined adaptive timestepping. We show that when the system is in an appropriate parameter regime, the hydrodynamic limit of the empirical mass density of the system is a solution to a nonlinear Fokker-Planck equation,

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18

Collyer, Benjamin S. "On the Fokker-Planck approximation to the Boltzmann collision operator." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/77691/.

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The Boltzmann equation (BE) is a mesoscopic model that provides a description of how gases undergoing a binary collision process evolve in time, however there is no general analytical approach for finding its solutions and direct numerical treatment using quadrature methods is prohibitively expensive due to the dimensions of the problem. For this reason, models that are able to capture the behaviour of solutions to the BE, but which are simpler to treat numerically and analytically are highly desirable. The Fokker-Planck collision operator is one such collision model, which is suited well to n

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Araújo, Marcelo Tozo de [UNESP]. "Aplicação da equação de Fokker-Planck no estudo de canais iônicos." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/127824.

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Made available in DSpace on 2015-09-17T15:25:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-03-27. Added 1 bitstream(s) on 2015-09-17T15:46:28Z : No. of bitstreams: 1 000846735.pdf: 4178375 bytes, checksum: 0b48d653f6d0491f468566e9d47fc572 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Este trabalho versa sobre o emprego da equação de Fokker-Planck (EFP) na descrição da difusão através de canais iônicos presentes na estrutura celular. Os canais possuem grande importância para o funcionamento celular por promoverem o equilíbrio químico entre o meio

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Vellmer, Sebastian. "Applications of the Fokker-Planck Equation in Computational and Cognitive Neuroscience." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21597.

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In dieser Arbeit werden mithilfe der Fokker-Planck-Gleichung die Statistiken, vor allem die Leistungsspektren, von Punktprozessen berechnet, die von mehrdimensionalen Integratorneuronen [Engl. integrate-and-fire (IF) neuron], Netzwerken von IF Neuronen und Entscheidungsfindungsmodellen erzeugt werden. Im Gehirn werden Informationen durch Pulszüge von Aktionspotentialen kodiert. IF Neurone mit radikal vereinfachter Erzeugung von Aktionspotentialen haben sich in Studien die auf Pulszeiten fokussiert sind als Standardmodelle etabliert. Eindimensionale IF Modelle können jedoch beobachtetes Pul

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Araújo, Marcelo Tozo de. "Aplicação da equação de Fokker-Planck no estudo de canais iônicos /." São José do Rio Preto, 2015. http://hdl.handle.net/11449/127824.

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Orientador: Elso Drigo Filho<br>Banca: João Ruggiero Neto<br>Banca: Mario José de Oliveira<br>Banca: Nelson Augusto Alves<br>Banca: Waldemar Donizete Bastos<br>Resumo: Este trabalho versa sobre o emprego da equação de Fokker-Planck (EFP) na descrição da difusão através de canais iônicos presentes na estrutura celular. Os canais possuem grande importância para o funcionamento celular por promoverem o equilíbrio químico entre o meio interno e externo da célula. Este controle do equilíbrio químico é diretamente relacionado à sua capacidade de abertura e fechamento (gating) e seletividade. Inicial

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Sjöberg, Paul. "Numerical solution of the Fokker-Planck approximation of the chemical master equation /." Uppsala : Department of Information Technology, Uppsala University, 2005. http://www.it.uu.se/research/publications/lic/2005-010/.

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Li, Wuchen. "A study of stochastic differential equations and Fokker-Planck equations with applications." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/54999.

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Fokker-Planck equations, along with stochastic differential equations, play vital roles in physics, population modeling, game theory and optimization (finite or infinite dimensional). In this thesis, we study three topics, both theoretically and computationally, centered around them. In part one, we consider the optimal transport for finite discrete states, which are on a finite but arbitrary graph. By defining a discrete 2-Wasserstein metric, we derive Fokker-Planck equations on finite graphs as gradient flows of free energies. By using dynamical viewpoint, we obtain an exponential convergenc

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Sjöberg, Paul. "Numerical solution of the Fokker–Planck approximation of the chemical master equation." Licentiate thesis, Uppsala universitet, Avdelningen för teknisk databehandling, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-86354.

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The chemical master equation (CME) describes the probability for the discrete molecular copy numbers that define the state of a chemical system. Each molecular species in the chemical model adds a dimension to the state space. The CME is a difference-differential equation which can be solved numerically if the state space is truncated at an upper limit of the copy number in each dimension. The size of the truncated CME suffers from an exponential growth for an increasing number of chemical species. In this thesis the chemical master equation is approximated by a continuous Fokker-Planck equati

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Spencer, Joseph Andrew. "A 2D Finite Elembent/1D Fourier Solution To The Fokker-Planck Equation." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1257.

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Plasma, the fourth state of matter, is a gas in which a significant portion of the atoms are ionized. It is estimated that more than 99% of the material in the visible universe is in the plasma state. The process that stars, including our sun, combine atomic nuclei and produce large amounts of energy is called thermonuclear fusion. It is anticipated future energy demands will be met by large terrestrial devices harnessing the energy of nuclear fusion. A gas hot enough to produce the number of atomic collisions needed for fusion is necessarily in the plasma state. Therefore, plasmas are of grea

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Groux, Benjamin. "Grandes d´eviations de matrices aléatoires et équation de Fokker-Planck libre." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLV137/document.

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Cette thèse s'inscrit dans le domaine des probabilités et des statistiques, et plus précisément des matrices aléatoires. Dans la première partie, on étudie les grandes déviations de la mesure spectrale de matrices de covariance $XX^*$, où $X$ est une matrice aléatoire rectangulaire à coefficients i.i.d. ayant une queue de probabilité en $exp(-at^{alpha})$, $alpha in ]0,2[$. On établit un principe de grandes déviations analogue à celui de Bordenave et Caputo, de vitesse $n^{1+alpha/2}$ et de fonction de taux explicite faisant intervenir la convolution libre rectangulaire. La démonstration repos

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Campos, Denise Caldas [UNESP]. "Solução da equação de Fokker-Planck para o potencial do oscilador harmônico duplo." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/87537.

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Scully, Noelle Catherine. "Semiclassical phase-integral solutions of a Fokker-Planck equation for a ferromagnetic particle." Thesis, Queen's University Belfast, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333834.

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Fleig, Arthur [Verfasser], and Lars [Akademischer Betreuer] Grüne. "Model Predictive Control for the Fokker--Planck Equation / Arthur Fleig ; Betreuer: Lars Grüne." Bayreuth : Universität Bayreuth, 2021. http://d-nb.info/1233353322/34.

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Campos, Denise Caldas. "Solução da equação de Fokker-Planck para o potencial do oscilador harmônico duplo /." São José do Rio Preto : [s.n.], 2012. http://hdl.handle.net/11449/87537.

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Orientador: Elso Drigo Filho<br>Coorientador: Jorge Chahine<br>Banca: Mário José de Oliveira<br>Banca: Regina Maria Ricotta<br>Resumo: A equação de Fokker-Planck é utilizada para descrever processos estocásticos e possui aplicações em muitos ramos da física, química e biologia. Para obter a solução da equação de Fokker-Planck, podemos mapeá-la em uma equação tipo Schrödinger através de mudanças apropriadas nas funções envolvidas. A vantagem dessa associação é que se pode construir a distribuição de probabilidade da equação de Fokker-Planck usando soluções conhecidas da equação de Schrödinger.

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Castro, Márcio Tavares de. "Equações de difusão associadas a séries temporais estocásticas : Kramers-Moyal versus Fokker-Planck." reponame:Repositório Institucional da UnB, 2009. http://repositorio.unb.br/handle/10482/4643.

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Dissertação (mestrado)—Universidade de Brasília, Instituto de Física, 2009.<br>Submitted by Raquel Viana (tempestade_b@hotmail.com) on 2010-04-12T20:24:31Z No. of bitstreams: 1 2009_MarcioTavaresCastro.pdf: 2643234 bytes, checksum: 372d6df8960ce4cf5b388420011bf2d7 (MD5)<br>Approved for entry into archive by Lucila Saraiva(lucilasaraiva1@gmail.com) on 2010-05-17T23:37:12Z (GMT) No. of bitstreams: 1 2009_MarcioTavaresCastro.pdf: 2643234 bytes, checksum: 372d6df8960ce4cf5b388420011bf2d7 (MD5)<br>Made available in DSpace on 2010-05-17T23:37:12Z (GMT). No. of bitstreams: 1 2009_MarcioTavaresCa

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Vellmer, Sebastian [Verfasser]. "Applications of the Fokker-Planck Equation in Computational and Cognitive Neuroscience / Sebastian Vellmer." Berlin : Humboldt-Universität zu Berlin, 2020. http://d-nb.info/1214240682/34.

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Martzel, Nicolas. "Diffusion de particules classiques en interaction : équation de Fokker-Planck en champ moyen." Paris 6, 2003. http://www.theses.fr/2003PA066553.

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Samogin, Eunice d'Avila. "Brecha espectral na geração de corrente por onda híbrida inferior." [s.n.], 1997. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278556.

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Orientador: Paulo H. Sakanaka<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica "Gleb Wataghin"<br>Made available in DSpace on 2018-07-23T12:45:45Z (GMT). No. of bitstreams: 1 Samogin_Euniced'Avila_D.pdf: 1282510 bytes, checksum: 4e68b6e2ad2de72e9046aa9187545b31 (MD5) Previous issue date: 1997<br>Resumo: A geração de corrente por onda híbrida inferior LH ("lower hybrid"), é a técnica mais promissora para a obtenção de corrente contínua para se chegar à fusão termonuclear controlada. A exitência da "brecha espectral" ("spectral gap") não permite a conciliação satisf

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Trefán, György. "Deterministic Brownian Motion." Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc279262/.

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The goal of this thesis is to contribute to the ambitious program of the foundation of developing statistical physics using chaos. We build a deterministic model of Brownian motion and provide a microscpoic derivation of the Fokker-Planck equation. Since the Brownian motion of a particle is the result of the competing processes of diffusion and dissipation, we create a model where both diffusion and dissipation originate from the same deterministic mechanism - the deterministic interaction of that particle with its environment. We show that standard diffusion which is the basis of the Fokker-P

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Miserocchi, Andrea. "The Fokker-Planck equation as model for the stochastic gradient descent in deep learning." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18290/.

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La discesa stocastica del gradiente (SGD) è alla base degli algoritmi di ottimizzazione di reti di Deep Learning più usati in AI, dal riconoscimento delle immagini all’elaborazione del linguaggio naturale. Questa tesi si propone di descrivere un modello basato sull’equazione di Fokker-Planck della dinamica del SGD. Si introduce la teoria dei processi stocastici, con particolare enfasi sulle equazioni di Langevin e sull’equazione di Fokker-Planck. Si mostra come il SGD minimizzi un funzionale sulla densità di probabilità dei pesi, non dipendente direttamente dalla funzione di costo. Infine si

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Polotto, Franciele [UNESP]. "Soluções da equação de Fokker-Planck para um potencial isoespectral ao potencial de Morse." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/87497.

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Made available in DSpace on 2014-06-11T19:22:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-09-30Bitstream added on 2014-06-13T19:28:24Z : No. of bitstreams: 1 polotto_f_me_sjrp.pdf: 227987 bytes, checksum: a4679850d9c8563cb11d6854f357428d (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Este trabalho explora a relação entre a equação de Fokker-Planck e a equação de Schrödinger para estudar soluções da primeira equação. O ponto de partida é o estudo do potencial de Morse, seguido pela geração de potenciais isoespectrais ao potencial de Morse, usando

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Araujo, Marcelo Tozo de [UNESP]. "Estudo dos métodos de solução da equação de Fokker-Planck linear e não linear." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/87515.

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Made available in DSpace on 2014-06-11T19:22:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-07-01Bitstream added on 2014-06-13T18:49:54Z : No. of bitstreams: 1 araujo_mt_me_sjrp.pdf: 1105011 bytes, checksum: 8882d04f0f922d97e919cd8dd4e66abb (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Este trabalho versa sobre difusão anômala, especificamente a proposição e solução exata e aproximada de um conjunto de equações não lineares de difusão. Primeiramente é apresentada a solução de dois sistemas sujeitos a difusão normal para explicitar a restrição que

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Dansereau, Jeffrey Paul. "An analytic-numerical scheme for a collisional Fokker-Planck time dependent sheath-presheath structure." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/17697.

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Araújo, Marcelo Tozo de. "Estudo dos métodos de solução da equação de Fokker-Planck linear e não linear /." São José do Rio Preto : [s.n.], 2011. http://hdl.handle.net/11449/87515.

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Orientador: Elso Drigo Filho<br>Banca: José Márcio Machado<br>Banca: Nelson Augusto Alves<br>Resumo: Este trabalho versa sobre difusão anômala, especificamente a proposição e solução exata e aproximada de um conjunto de equações não lineares de difusão. Primeiramente é apresentada a solução de dois sistemas sujeitos a difusão normal para explicitar a restrição que há em métodos de solução para a equação de difusão não linear. Em seguida, focamos o trabalho em processos anômalos mostrando, inicialmente a solução estacionária que maximiza a entropia de Tsallis. Sua solução exata é uma gaussiana

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Polotto, Franciele. "Soluções da equação de Fokker-Planck para um potencial isoespectral ao potencial de Morse /." São José do Rio Preto : [s.n.], 2009. http://hdl.handle.net/11449/87497.

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Orientador: Elso Drigo Filho<br>Banca: Nelson Augusto Alves<br>Banca: José Roberto Ruggiero<br>Resumo: Este trabalho explora a relação entre a equação de Fokker-Planck e a equação de Schrödinger para estudar soluções da primeira equação. O ponto de partida é o estudo do potencial de Morse, seguido pela geração de potenciais isoespectrais ao potencial de Morse, usando o formalismo de Supersimetria em Mecânica Quântica. Os potenciais quânticos isoespectrais possuem os mesmos autovalores de energia do potencial original, mas as funções de onda são distintas. Dessa forma, a probabilidade de transi

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Денисов, Станіслав Іванович, Станислав Иванович Денисов, Stanislav Ivanovych Denysov, V. V. Reva, and O. O. Bondar. "Generalized Fokker-Planck Equation for the Nanoparticle Magnetic Moment Driven by Poisson White Noise." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35373.

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We derive the generalized Fokker-Planck equation for the probability density function of the nanoparticle magnetic moment driven by Poisson white noise. Our approach is based on the reduced stochastic Landau-Lifshitz equation in which this noise is included into the effective magnetic field. We take into account that the magnetic moment under the noise action can change its direction instantaneously and show that the generalized equation has an integro-differential form. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35373

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Ndao, Mamadou. "Estimation de la vitesse de retour à l'équilibre dans les équations de Fokker-Planck." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLV036/document.

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Ce mémoire de thèse est consacré à l’équation de Fokker-Planckpartial_ f=∆f+div(Ef).Il est subdivisé en deux parties :une partie linéaire et une partie non linéaire. Dans la partie linéaire on considère un champ de vecteur E(x) dépendant seulement de x. Cette partie est constituée des chapitres 3, 4 et 5. Dans le chapitre 3 on montre que l’opérateur linéaire Lf :=∆ f + div(E f ) est le générateur d’un semi-groupe fortement continu (SL(t))_{t≥0} dans tous les espaces L^p. On y établit également que le semi-groupe (SL(t))_{t≥0} est positif et ultracontractif. Dans le chapitre 4 nous montrons com

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Silva, George Frederick Tavares da. "Termoestatística do Movimento Superamortecido de Partículas Interagentes." reponame:Repositório Institucional da UFC, 2013. http://www.repositorio.ufc.br/handle/riufc/11939.

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SILVA, George Frederick Tavares da. Termoestatística do Movimento Superamortecido de Partículas Interagentes. 2013. 129 f. Tese (Doutorado em Física) - Programa de Pós-Graduação em Física, Departamento de Física, Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2013.<br>Submitted by Edvander Pires (edvanderpires@gmail.com) on 2015-05-05T16:50:05Z No. of bitstreams: 1 2013_tese_gftsilva.pdf: 4464784 bytes, checksum: c215b7122d3e38256ec6c8231ceb3bc9 (MD5)<br>Approved for entry into archive by Edvander Pires(edvanderpires@gmail.com) on 2015-05-07T16:59:18Z (GMT) No. of bitstreams: 1

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MANZI, GUIDO. "Un modello cinetico per il moto di interfaccia." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2006. http://hdl.handle.net/2108/233.

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Un modello cinetico per il moto di interfaccia Guido Manzi Sommario Dopo una breve introduzione sui limiti di scala e i processi di segregazione di fase, presentiamo un modello per il moto di interfaccia tra due fluidi differenti, descritti da una coppia di equazioni cinetiche. Le loro soluzioni forniscono la dinamica degli stati finali attesa in base all’equazione di Cahn-Hilliard. La segregazione di fase è una transizione di fase del primo ordine che avviene nelle miscele quando la temperatura è abbassata al di sotto della curva di coesistenza. Domini ricchi in componenti diverse cominc

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Larson, David F. H. "A framework for ship stability in a seastate using the state-space Fokker-Planck method." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118706.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 91-93).<br>Ships sailing on the ocean have many inherent dangers. One of the most compelling is when they interact with severe stochastic waves, resulting in a loss of stability and adversely affecting their operation. This can result in extreme motions, at the very least making life difficult for crew, to potentially the most catastrophic events capsize, and loss of cargo and life. This compels the need to relia

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Lemou, Mohammed. "Etude mathématique et résolution numérique de l'équation de Fokker-Planck-Landau en physique des plasmas." Toulouse 3, 1996. http://www.theses.fr/1996TOU30270.

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L'equation de fokker-planck est un modele cinetique collisionnel communement utilise pour modeliser les plasmas chauds. Ce modele est decrit par une equation d'evolution cinetique comportant un second membre quadratique appele facteur de collision. Cet operateur de collision de fokker-planck derive de l'operateur de collision de boltzmann lorsque les integrales divergentes dues au potentiel coulombien sont remplacees par leur partie principale. Il est constitue d'un operateur de diffusion non-lineaire par rapport a la variable de vitesse, dont la non-linearite apparait a travers la dependance

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Finke, Justin David. "Monte Carlo/Fokker-Planck simulations of Accretion Phenomena and Optical Spectra of BL Lacertae Objects." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181833339.

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Fok, Chin Man. "Numerical solutions for the Navier-Stokes equations and the Fokker-Planck equations using spectral methods." HKBU Institutional Repository, 2002. http://repository.hkbu.edu.hk/etd_ra/435.

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Yamaki, Tania Patricia Simões. "Solução exata da equação de Kramers para uma partícula Browniana carregada sob ação de campos elétrico e magnético externos e aplicações à hidrotermodinâmica." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277085.

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Orientadores: Roberto Eugenio Lagos Monaco, Roberto Antonio Clemente<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-17T17:49:01Z (GMT). No. of bitstreams: 1 Yamaki_TaniaPatriciaSimoes_D.pdf: 15751882 bytes, checksum: 3bccb71a25a31c07f0e3e25ffb074896 (MD5) Previous issue date: 2010<br>Resumo: Após apresentarmos uma revisão dos principais modelos teóricos para o movimento Browniano, consideramos em particular o caso de uma partícula Browniana carregada sob ação de campos elétrico e magnético. A obtenção de uma s

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