Homoclinic
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Dynamic pull-in instability of geometrically nonlinear actuated micro-beams based on the modified couple stress theory
This paper investigates the dynamic pull-in instability of vibrating micro-beams undergoing large deflection under electrosatically actuation. The governing equation of motion is derived based on the modified couple stress theory. Homotopy Perturbation Method is employed to produce the high accuracy approximate solution as well as the second-order frequency-
Lat. Am. j. solids struct.. Publicado em: 2014-10
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2. Tangências homoclínicas, entropia e medidas de SRB / Homoclinic tangencies, entropy and SRB measure
We study the effect of a homoclinic tangency in the variation of the topological entropy. We prove that a diffeomorphism with a homoclinic tangency associated to a basic hyperbolic set with maximal entropy is a point of entropy variation in the C POT THE INFINITEtopology. We also discuss variational problem in C POT.1topology and we show an example of discon
Publicado em: 2010
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3. NONLINEAR DYNAMICS, INSTABILITY AND CONTROL OF STRUCTURAL SYSTEMS WITH MODAL INTERACTION / DINÂMICA NÃO-LINEAR, INSTABILIDADE E CONTROLE DE SISTEMAS ESTRUTURAIS COM INTERAÇÃO MODAL
The aim of this thesis is to study the influence of coupled buckling modes on the static and particularly on the nonlinear dynamic behavior of structural components liable to buckling. For this, two discrete two degrees of freedom models known for their complex nonlinear behavior are selected: the well-known Augusti¿s model and a simplified model of cable-s
Publicado em: 2010
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4. Perturbations of reversible systems / Perturbações de sistemas reversiveis
In this work we study the existence and persistence of some minimal sets in perturbations of reversible systems. First we make non reversible perturbations of centers in R2 and R4 and we detect conditions for the existence of limit cycles and invariant tori. We study the existence of periodic solutions of the perturbations of a family of di_erential equation
Publicado em: 2009
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5. Estudo do bilhar no anel de círculos excêntricos
We study a two parameter family of billiards in circular tables with an internal obstacle. The dynamic is described by the action of an homeomorphism of the compact cylinder. We study the stability of the xed points and we use the symmetries of the problem to analyze the behavior of the invariant manifolds of the hyperbolic xed point. We prove the existence
Publicado em: 2008
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6. Orbitas homoclinicas em sistemas reversiveis / Homoclinic orbits in reversible systems
In this work we deal with the dynamics of a generic one-parameter family INT . IND. mu, PERTENCE (-e, e), of reversible vector fields defined in R POT. 4 . More specifically, we assume that INT IND. o (0) = 0, the eigenvalues of D INT IND. o (0) are real and given by + ou - 1, + ou - gama with gama >1 and the unstable manifolds of 0, WU POT. ipsilon (0) poss
Publicado em: 2007
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7. Comportamento complexo na formação de bolhas de ar em líquidos / Complex behaviour in air-liquid bubble formation
We have investigated the air bubble formation in viscous fluid with some control parameters. We have characterized the sistem using the air flow and the length of the hose that connects the air flow control system and the injector nozzle as control parameters. The hose corresponds to a system dissipative element. We have found period adding routes with and w
Publicado em: 2007
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8. Feature binding as neuron synchronization: quantum aspects
Feature binding denotes how a large collection of coupled neurons combines external signals with internal memories into new coherent patterns of meaning. An external stimulus spreads over an assembly of coupled neurons, building up a corresponding collective state. Thus, the synchronization of spike trains of many individual neurons is the basis of a coheren
Brazilian Journal of Physics. Publicado em: 2005-06
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9. Evolution of chaos in the Matsumoto-Chua circuit: a symbolic dynamics approach
We use symbolic dynamics to follow the evolution of the Matsumoto-Chua circuit in the chaotic regime. We consider the evolution of the whole population of unstable periodic orbits and of the associated trajectories, in four chaotic attractors generated by the circuit. Symbolic planes and first return maps are built for different values of the control paramet
Brazilian Journal of Physics. Publicado em: 2005-03
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10. Sobre caos homoclinico : aplicações a ciencia da engenharia e mecanica / Homoclinic chaos : applications to the science of engineering and mechanics
Este trabalho tem como objetivo a determinação analítica da ocorrência de um tipo de caos (irregularidade) determinístico denominado Caos Homoclínico em algumas aplicações da Ciência da Engenharia como, por exemplo, a Robótica e a Teoria de Controle (Controle de Bifurcações e Caótico). Para isto, faz-se uso da chamada Teoria de Poincaré - Mel?n
Publicado em: 2005
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11. Analysis of attracting and non-attracting chaotic sets in low and high-dimensional dynamical systems: application to the dynamics of plasma waves in the sun-earth connection / Análise de conjuntos caóticos atrativos e não atrativos em sistemas dinâmicos de baixa e alta dimensão: aplicação para a dinâmica de ondas de plasma na conexão sol - terra
In this work we present a numerical study on the interaction between chaotic attractors and nonattracting chaotic sets in mathematical models that describe the nonlinear dynamics of plasma waves in the Sun-Earth connection. The work is divided in two parts. In the first part we analyze a low-dimensional dynamical system describing stationary Alfv´en waves m
Publicado em: 2003
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12. Familias genericas a 1-parametro de campos vetoriais reversiveis
In this work a geometric approach of Reversible Dynamical Systems is done. Our main purpose is to classify the symmetric properties of Reversible vector fields by means of the exhibition of efficient normal forms. Moreover, a study of occurrence of homoclinic orbits is also performed.
Publicado em: 2002