Chaotic Behavior In Systems
Mostrando 13-24 de 26 artigos, teses e dissertações.
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13. Nonlinearities in quantum mechanics
Many of the paradoxes encountered in the Copenhagen interpretation of quantum mechanics can be shown to have plausible, more logical parallels in terms of nonlinear dynamics and chaos. These include the statistical exponential decay laws, interpretations of Bell's inequalities, spontaneous symmetry breaking, and perhaps diffractive behavior and even quantiza
Brazilian Journal of Physics. Publicado em: 2005-06
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14. 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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15. Nonlinear dynamic of objects in space excited by the gravity potential / Dinamica não-linear de objetos no espaço, excitados pelo potencial de gravidade
Este trabalho consiste de duas partes, na primeira faremos o estudo da dinâmica de uma espaçonave de dupla rotação axial, modelada por um sistema mecânico simples, constituído de um rotor desbalanceado atachado num suporte elástico e governado por uma fonte de energia não-ideal. Na segunda parte formularemos todas as equações diferenciais não-line
Publicado em: 2005
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16. Universality classes of chaotic cellular automata
Cellular automata (CA) are discrete, spatially-homogeneous, locally-interacting dynamical systems of very simple construction, but which exhibit a rich intrinsic behavior. Even starting from disordered initial configurations, CA can evolve into ordered states with complex structures crystallized in space-time patterns. In this paper we concentrate on determi
Brazilian Journal of Physics. Publicado em: 2004-06
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17. Comportamento assintótico de sistemas não lineares discretos / Asymptotic behavior of non lineal discrete systems
Firstly, in this work, we present a study of part of two works by J. P. LaSalle, concerning with asymptotic behavior of discrete systems. Secondly, we study the dynamics of a discrete system that depends on a parameter l in L, of the form x(n+1) = f(x(n), l). As part of this general purpose, we develop tecniques to obtain uniform estimates (with respect to t
Publicado em: 2004
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18. Understanding the complexity in low dimensional systems
Complex System is any system that presents involved behavior, and is hard to be modeled by using the reductionist approach of successive subdivision, searching for ''elementary'' constituents. Nature provides us with plenty of examples of these systems, in fields as diverse as biology, chemistry, geology, physics, and fluid mechanics, and engineering. What h
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-11
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19. Chaos in a Two-Degree of Freedom Duffing Oscillator
High dimensional dynamical systems has intricate behavior either on temporal or on spatial evolution properties. Nevertheless, most of the work on chaotic dynamics has been concentrated on temporal behavior of low-dimensional systems. This contribution is concerned with the chaotic response of a two-degree of freedom Duffing oscillator. Since the equations o
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-05
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20. Analise não linear de sistemas dinamicos holonomos não ideais / Nonlinear anaIysis of non ideals holonomic dynamical systems
Several times the mechanical systems join the behavior described by laws of motion to the dynamic of their operation. Their solution pass by adopted simplified hypotheses in order to obtain a representative and helpful mathematical model. When the energy source used in the bringing to the action of the motion has limited power, i.e., there is not sufficient
Publicado em: 2002
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21. Familias de orbitas periodicas e suas cicatrizes em osciladores bidemensionais acoplados
Apresentamos nesta dissertação um estudo da conexão entre a Mecânica Clássica e a Mecânica Quântica através dos diagramas de energia vs. período para as principais famílias de órbitas periódicas de um dado sistema dinâmico. O diagrama quântico é definido através do espectro do sistema quântico correspondente, que mostra cicatrizes dessas fam
Publicado em: 1998
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22. Orbitas periodicas em sistemas caoticos
In this work we developed a new method to find periodic orbits in chaotic systems. The method is based on a one-dimensional scan at the Poincaré section and uses the behavior of nearby trajectories as a guide in the search. The method is generic and can be apllied to any two-degree of freedom system. As an example we have considered the Quartic Potencial in
Publicado em: 1996
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23. Predicting chaos for infinite dimensional dynamical systems: the Kuramoto-Sivashinsky equation, a case study.
The results of extensive computations are presented to accurately characterize transitions to chaos for the Kuramoto-Sivashinsky equation. In particular we follow the oscillatory dynamics in a window that supports a complete sequence of period doubling bifurcations preceding chaos. As many as 13 period doublings are followed and used to compute the Feigenbau
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24. Complex dynamics of multilocus systems subjected to cyclical selection.
Earlier we have shown that oscillations with a long period ("supercycles") may arise in two-locus systems experiencing cyclical selection with a short period. However, this mode of complex limiting behavior appeared to be possible for narrow ranges of parameters. Here we demonstrate that a multilocus system subjected to stabilizing selection with cyclically