Poincare Section
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Medida da dispersão da periodicidade de um sinal de voz normal e voz patológica através da seção de Poincaré / Measurement of the frequency dispersion of a normal voice signal and voice pathology through the Poincaré section
A voz humana apresenta flutuações na frequência, amplitude e formato de onda. Esse comportamento característico pode ser estudado usando técnicas de análise não linear, além das técnicas convencionais. O objetivo desse trabalho é analisar sinais de vozes normais e patológicas (com nódulos e edemas) usando seção de Poincaré de vários trechos d
Publicado em: 2011
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2. Efeitos causados pela modulação de parâmetros no mapa de hénon / Effects caused by the parameters modulation in the hénon map
The Hénon map is a paradigmatic two-dimensional discrete-time dynamical system, which was originally proposed as a model to the Poincaré section of the continuous-time Lorenz system, and has been extensively investigated in the last years. Apart from its theoretical importance, some practical applications are possible. As an example, it can be used to mode
Publicado em: 2011
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3. A multiparameter chaos control method applied to maps
Chaos is a kind of nonlinear system response that has a dense set of unstable periodic orbits (UPOs) embedded in a chaotic attractor. The idea of the chaos control is to explore the UPO stabilization obtaining dynamical systems that may quickly react to some new situation, changing conditions and their response. The OGY (Ott-Grebogi-Yorke) method achieves sy
Brazilian Journal of Physics. Publicado em: 2008-12
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4. Orbital evolution and maneuvers around non-spherical bodies / Evolução orbital e manobras em torno de corpos não-esféricos
In the last years several asteroids had their shapes identified using images from space probes or through the indirect radar data determination. In a general way, these asteroids have forms quite different from spherical. Conventional spherical harmonic representations of the gravitational potential of such bodies require expansions of high degree and order,
Publicado em: 2006
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5. O Teorema do h-cobordismo e a conjectura generalizada de PoincarÃ
The work of the following way In the first chapter it is developed to a list definitions and theorems that we found but important on subjects such as Topology, Differential Manifolds and aspects of the Algebraic Topology, which will be used in the following chapters. We considered advisable to indicate the demonstrations of the theorems, thus, like commentar
Publicado em: 2005
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6. 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