Deterministic Chaos
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. BOVESPA: Stochastic or Deterministic?
Abstract We aim to present an interdisciplinary way of showing the subject determinism versus stochasticity; and write the text in such a way that this subject can be treated from the point of view of physics teaching. We approach the technical part of this work intuitively and later we present this question in a more formal way. When the trajectory of a dyn
Rev. Bras. Ensino Fís.. Publicado em: 13/11/2018
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2. Bilhares : aspectos clássicos e quânticos / Billiards : classical and quantum aspects
Fizemos um estudo sistemático dos aspectos clássicos e quânticos dos sistemas dinâmicos conhecidos como "bilhares". Introduzimos uma nova classe de bilhares classicamente caóticos cuja dinâmica quântica pode ser convenientemente descrita utilizando-se uma aproximação do tipo Galerkin, o que nos permitiu obter com boa precisão um grande numero de au
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/06/2012
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3. Doce ou atroz, manso ou feroz‖: os currículos realizados/inventados na relação com a(s) diferença(s) no cotidiano escolar
It was from the understanding of the ephemeral, the uncertainty and complexity that this dissertation was built. It is the result of my inquiries before the school and the difference(s) among students. I intended to dip in school life (re)visiting teaching practices embodied in the curricula made/invented various forms of questioning to be/seem/to be of the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/08/2011
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4. Análise de caos em leito fluidizado circulante / Chaos analysis in circulating fluidized bed
Stringer (1989) sugeriu que um leito fluidizado gás-sólido pode ser um sistema caótico no qual seu comportamento irregular, entretanto determinístico, é causado por suas propriedades não-lineares. Desde então, surgiu uma nova forma de analisar flutuações de sinais em sistemas fluidizados: a análise não linear de séries temporais, comumente referi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/05/2011
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5. Intrinsic modulational alfvenic turbulence
The nonlinear dynamics of a nite-amplitude Alfv en wave in a dispersive modulational regime is analysed. Use is made of a conservative model to show that turbulence may arise via deterministic chaos. The behaviour of the system is studied as one varies the initial amplitude of the pump Alfv en wave, the dispersion parameter and the plasma parameter β.
Publicado em: 2011
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6. Algumas evidências de não linearidade e caos determinístico nos ciclos econômicos brasileiros entre 1975-2009 / Some evidences of nonlinearity and deterministic chaos in the Brazilian economical cycles among 1975-2009
Esta pesquisa teve como principal objetivo verificar a possível ocorrência de caos nas séries econômicas brasileiras da produção industrial geral e da produção de bens de capital, consideradas proxies para a produção total e para o investimento, respectivamente, entre 1975 e 2009. Neste período, o Brasil passou por grandes oscilações nos agregad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2010
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7. Kinetic theory of Hamiltonian maps / Teoria cinética de mapas hamiltonianos
This work consists in the study of the transport properties of chaotic Hamiltonian systems by using projection operator techniques. Such systems can exhibit deterministic diffusion and display an approach to equilibrium. We show that this diffusive behavior can be viewd as a spectral property of the associated Perron-Frobenius operator. In particular, the le
Publicado em: 2007
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8. Padrões visuais de sinais de voz aravés de técnica de análise não linear / Voice signal discrimination with nonlinear analysis techniques
Human voice has been the focus of study for different areas of science. Researches in the last two decades have demonstrated the existence of chaos in human voice production. The purpose of this work is to use nonlinear dynamics techniques in the analysis of normal voices from healthy subjects and correlate them to traditional acoustic parameters as well as
Publicado em: 2006
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9. Dinâmicas emergentes na família de memórias associativas bidirecionais caóticas e sua habilidade para saltar passos / Emergent dynamics in family of chaotic bidirectional associative memories and its ability to skip steps
In this thesis, a family of bidirectional associative memories (C-BAM family) is proposed, implemented and tested to extend the study of chaotic phenomenon in associative models. In the C-BAM model, all the original neurons of bidirectional associative memory (BAM), BAM with delay and exponenetial BAM (eBAM) were substituted for chaotic neurons. Based on the
Publicado em: 2006
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10. 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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11. Quantum chaos, dynamical stability and decoherence
We discuss the stability of quantum motion under system's perturbations in the light of the corresponding classical behavior. In particular we focus our attention on the so called "fidelity" or Loschmidt echo, its relation with the decay of correlations, and discuss the quantum-classical correspondence. We then report on the numerical simulation of the doubl
Brazilian Journal of Physics. Publicado em: 2005-06
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12. Sobre dinamica caotica e convergencia em algoritmos de equalização autodidata
The objective of this work is to perform a dynamical analysis of the constant modulus algorithm (CMA) iterative expression. The analysis shows that the CMA, in both deterministic and stochastic versions, can present, besides the usual convergence to fixed point and divergence types of behavior, a very rich dynamical scenario, which includes period-do
Publicado em: 2001