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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
171

Linear numeration systems, finite beta expansions, and discrete spectrum of substitution dynamical systems /

Hollander, Michael Israel. January 1996 (has links)
Thesis (Ph. D.)--University of Washington, 1996. / Vita. Includes bibliographical references (leaves [119]-123).
172

Newton-Picard Gauss-Seidel

Simonis, Joseph P. January 2004 (has links) (PDF)
Dissertation (Ph.D.)-- Worcester Polytechnic Institute. / Keywords: Newton; Picard; periodic solutions; dynamical systems. Includes bibliographical references (p.10-11).
173

Invariant sets in the monkey saddle

Rod, David L. January 1971 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1971. / Vita. Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
174

Differential equations with state-dependent delay : global Hopf bifurcation and smoothness dependence on parameters /

Hu, Qingwen. January 2008 (has links)
Thesis (Ph.D.)--York University, 2008. Graduate Programme in Applied Mathematics. / Typescript. Includes bibliographical references (leaves 271-282). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR51719
175

Smoothness of invariant densities for certain classes of dynamical systems /

Osman, Abdusslam. January 1996 (has links)
Thesis (M. Sc.)--Dept. of Mathematics and Statistics, Concordia University, 1996. / "May 1996." Includes bibliographical references. Available also on the Internet.
176

Relating constrained motion to force through Newton's second law

Roithmayr, Carlos. January 2007 (has links)
Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2007. / Bauchau, Olivier, Committee Member ; Hodges, Dewey, Committee Chair ; Singhose, William, Committee Member ; Costello, Mark, Committee Member ; Flannery, Raymond, Committee Member.
177

Analytic redundancy and the design of robust failure detection systems

January 1982 (has links)
by Edward Y. Chow, Alan S. Willsky. / "October, 1982." / Bibliography: p. 43-44. / Office of Naval Research Contract No. N00014-77-C-0224 NASA Ames Research Center Grant No. NGL-22-009-124
178

Guaranteed robustness properties of multivariable, nonlinear, stochastic optimal regulators

January 1983 (has links)
John N. Tsitsiklis, Michael Athans. / "February 1983." / Bibliography: p. 10-11. / grant NASA/NGL-22-009-124
179

Analyse mathématique et numérique de problèmes de propagation des ondes dans des milieux périodiques infinis localement perturbés.

Fliss, Sonia 12 May 2009 (has links) (PDF)
Les milieux périodiques présentent des propriétés intéressantes dans un grand nombre d'applications (les cristaux photoniques en optique, les matériaux composites en mécanique,...). Dans ces applications, on rencontre souvent ces milieux présentant des défauts localisés, c'est-à-dire des milieux qui diffèrent de milieux périodiques dans des régions bornées. Il nous semble intéressant de proposer des méthodes mathématiques et numériques nouvelles spécifiques au traitement des structures périodiques de grande taille, pouvant présenter des défauts localisés. Les caractéristiques du problème rendant très souvent les méthodes d'homogénéisation inapplicables, l'idée est d'exploiter la structure particulière des milieux périodiques pour restreindre les calculs au voisinage du défaut. Nous avons donc approfondi la question de trouver des conditions aux bords parfaitement transparentes. C'est pourquoi nous avons cherché à généraliser les techniques de conditions transparentes non locales, de type Neumann-to-Dirichlet, bien établies pour les milieux homogènes à l'extérieur de la perturbation. La difficulté est que lorsque le milieu extérieur est homogène, on ne dispose plus d'une représentation explicite de la solution. Nous traitons successivement trois situations de difficulté croissante : le cas monodimensionnel qui est un cas classique mais dont l'étude a des vertus pédagogiques, le problème du guide périodique localement perturbé et le problème plus complexe du milieu périodique dans les deux dimensions. Pour chaque situation, la démarche est la même : elle consiste tout d'abord à résoudre le problème pour un milieu absorbant puis pour un milieu non absorbant par absorption limite. Nous pouvons alors montrer que les opérateurs DtN peuvent être caractérisés en utilisant la solution de problèmes de cellule locaux, l'utilisation d'outils mathématiques tels que la Transformée de Floquet-Bloch et la solution d'équations quadratiques et linéaires à valeurs et inconnus opérateurs.
180

Influência de dissipação em mapas bidimensionais /

Kato, Laryssa Kimi. January 2018 (has links)
Orientador: Ricardo Egydio de Carvalho / Banca: Ana Paula Mijolaro / Banca: Luiz Antônio Barreiro / Resumo: De maneira geral, o comportamento dinâmico de sistemas não lineares é caracterizado pela imprevisibilidade e extrema sensibilidade às condições iniciais e aos parâmetros do sistema. A sensibilidade dessas condições pode ser analisada a partir dos expoentes de Lyapunov, quando são consideradas órbitas infinitesimalmente próximas. O mapa escolhido para análise é o modelo denominado "Mapa padrão não - twist dissipativo labiríntico", que apresenta as chamadas curvas shearless. O estudo desenvolvido analisa esse sistema com a introdução de dissipação e com parâmetros de perturbação variáveis na presença de três curvas shearless. O objetivo é compreender a evolução da dinâmica destas curvas no espaço de fase e no diagrama de Lyapunov a fim de caracterizar qual shearless é mais robusta frente á variação dos parâmetros de dissipação e perturbação / Abstract: In general, the dynamical behavior of non-linear systems is characterized by unpredictability and extreme sensibility to the initial conditions and to the parameters of the system. The sensitivity of these conditions can be analyzed from the Lyapunov exponents, when infinitesimally close orbits are considered. The map we have chosen for analysis is the model denoted as "Labyrinthic non-twist standard map", which presents the so-called "shearless" curves. The present study analyzes this system with the introduction of dissipation and with changeable parameters of perturbation in the presence of three shearless curves. The objective is to understand the evolution of the dynamics of the curves in the phase space and in the diagram of Lyapunov in order to characterize which shearless is more robust under the variation of both parameters, dissipation and perturbation / Mestre

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