Chaos Control
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Effects of resistance training protocols on nonlinear analysis of heart rate variability in metabolic syndrome
Despite the various standard non-linear measurements used in autonomic modulation (AM) assessments usually being applied to long time-series, such analyses can sometimes be applied to shorter term series. To overcome this disadvantage, chaotic global methods were formulated by putting together heart rate variability (HRV) linear methods. Chaos provides infor
Braz J Med Biol Res. Publicado em: 11/06/2018
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2. Novas propostas para análise de estabilidade, controle e processamento de sinais no contexto de dinâmicas não-lineares / Contributions for stability analysis, control and signal processing in the context of nonlinear dynamics
A presente tese de doutoramento apresenta contribuições à análise de estabilidade, ao controle e ao processamento de sinais no contexto de sistemas dinâmicos não-lineares. No que se refere à análise de estabilidade, este trabalho apresenta um novo método para calcular o espectro de Lyapunov para soluções de sistemas dinâmicos a partir de cópias
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/2011
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3. Controle de caos e saltos entre atratores em um sistema com impactos / Control of caos and basin hopping in a system with impacts
For a mechanical system, described by the impact-pair model, we studied the control of chaos by a parametric perturbation and the basin-hopping phenomeno. For this nonintegrable system, we obtained numerically the evolution of its dynamical variables for a large set of initial conditions and control parameters. For this analysis, we used phase planes, Poinca
Publicado em: 2010
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4. Lavando a Alma: análise do contexto de uma sala de aula de língua inglesa de escola pública sob a luz da teoria do caos/complexidade. / Letting It All Out:analyzing an English classroom context in a state school based on chaos/complexity theory.
This research is an ethnographic case study that analyzes, in a descriptive form, the English language lessons in a second year high school classroom in a state school in the city of Goiânia. For this, we conducted a participant-observation research study, which, according to Spradley (1980), occurs when the researcher observes what happens in the research
Publicado em: 2010
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5. Controle de caos em PLL de terceira ordem. / Control of chaos in third-order PLL.
Inicialmente, apresentam-se características de dispositivos eletrônicos conhecidos como PLLs (phase-locked loops). PLLs são amplamente empregados para se extrair sinais de tempo em canais de comunicação e em aplicações nas quais se deseja controle automático de freqüência. O objeto principal é estudar PLLs analógicos descritos por uma equação d
Publicado em: 2009
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6. Trilogia Qatsi : visões e movimentos de mundo / Qatsi trilogy : visions and movements of world
This work is a filmic analysis of the Qatsi trilogy (Koyaanisqatsi, Powaqqatsi, Naqoyqatsi), directed by Godfrey Reggio. Firstly, it is presented a bio-filmography of the director, indicating his trajectory and some comments on each of his films. Then, the analysis of the trilogy takes place, beginning with Koyaanisqatsi and focusing the acceleration movemen
Publicado em: 2009
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7. 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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8. Finding invariant tori in the problem of a periodically corrugated waveguide
Some dynamic properties for a light ray suffering specular reflections inside a periodically corrugated waveguide are studied. The dynamics of the model is described in terms of a two dimensional nonlinear area preserving map. We show that the phase space is mixed in the sense that there are KAM islands surrounded by a large chaotic sea that is confined by t
Brazilian Journal of Physics. Publicado em: 2008-03
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9. The leishmaniases - survival and expansion in a changing world: a mini-review
The number of cases of visceral and cutaneous leishmaniasis is increasing globally at an alarming rate irrespective of the region and the leishmaniases are amongst the top emergent diseases in spite of control measures. In the present review attention is drawn to some of the reasons for this. The leishmaniases have expanded beyond their natural ecotopes due
Memórias do Instituto Oswaldo Cruz. Publicado em: 2007-08
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10. 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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11. Importance analysis of the risk exposure value measurement and control in complex products development projects. / Análise da importância da mensuração e controle do valor da exposição a riscos em projetos de desenvolvimento de produtos complexos.
Nowadays, the survival of an organization is reached through the search for opportunities and projects are launched in order to take advantage of these opportunities. According to Smith and Merritt (2002), product development projects, compared with other types of projects, have additional risk elements due to the high level of innovation associated to them.
Publicado em: 2007
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12. Fuzzy modelling for trajectory fixation in chaotic systems. / Modelagem fuzzy para fixação de trajetórias em sistemas caóticos.
A mapping of analytical tools for representation and computational treatment of Fuzzy Systems was made in this thesis. This mapping evidenced the existence of relations and the adequacy of the use of the Fuzzy Theory in the models construction for the problems solution involving dynamic systems e, in particular, of chaotic systems. A differentiation was cons
Publicado em: 2007