Parameter Spaces
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. Cardiovascular assessment in Female Spotted Paca ( Cuniculus paca )
RESUMO Com o objetivo de fornecer informações da morfofisiologia cardiovascular da Cuniculus paca, um importante roedor neotropical, oito fêmeas adultas saudáveis dessa espécie foram avaliadas três vezes pela ecocardiografia, sob anestesia geral com isoflurano, a cada 15 dias. Os exames foram realizados por um único avaliador experiente, com os animai
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2019-02
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2. Dispersion of Love wave in an isotropic layer sandwiched between orthotropic and prestressed inhomogeneous half-spaces
Abstract An in-depth study has been carried out for the dispersion of Love waves in an isotropic elastic layer sandwiched between orthotropic and prestressed inhomogeneous elastic half-spaces. The inhomogeneities in density and rigidity of the lower half-space are space dependent and an arbitrary function of depth. Simple mathematical techniques are used to
Lat. Am. j. solids struct.. Publicado em: 2015-10
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3. Estudo numérico da dinâmica de osciladores forçados no espaço de parâmetros / Numerical study of the dynamics of driven oscillators in the parameter spaces
Nesta dissertação estudamos a dinâmica dos osciladores forçados, via estudo do espaço (plano) de parâmetros. Para caracterizar o comportamento no espaço de parâmetros, usamos dois métodos: um que calcula somente o maior expoente de Lyapunov e o outro que calcula o espectro de Lyapunov. Os sistemas estudados nessa dissertação são: três osciladore
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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4. Diagramas de bifurcação para um oscilador de chua quadridimensional / Bifurcation diagrams for a four-dimensional chua oscilllator / Bifurcation diagrams for a four-dimensional chua oscilllator / Diagramas de bifurcação para um oscilador de chua quadridimensional
In this work, we numerically studied a four-dimensional Chua circuit model through bifurcation diagrams and parameter spaces. Our main objective here is to ex-tend the studies already realized in this system, showing a wider range of its behavior. For this purpose, we constructed the parameter spaces using the Lyapunov exponents spectrum through color scales
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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5. Estudo numérico das bifurcações do sistema regulador de Watt / Numerical study of bifurcations in the Watt governor system
Neste trabalho estudamos a auto-organização de estruturas periódicas no espaço de parâmetros do maior expoente de Lyapunov (diagramas de Lyapunov) em um modelo do sistema regulador deWatt. Uma organização hierárquica e cascatas de bifurcação por adição de período das estruturas periódicas são observadas e estas cascatas auto-organizadas se acu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/07/2011
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6. Information geometric similarity measurement for near-random stochastic processes
We outline the information-theoretic differential geometry of gamma distributions, which contain exponential distributions as a special case, and log-gamma distributions. Our arguments support the opinion that these distributions have a natural role in representing departures from randomness, uniformity, and Gaussian behavior in stochastic processes. We show
Publicado em: 2011
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7. AvaliaÃÃo dos efeitos renais da fraÃÃo L-aminoÃcido Oxidase isolada do veneno da serpente Bothrops marajoensis. / Assessment of renal effects of L-amino acid oxidase fraction isolated from snake Bothrops marajoensis venom.
There are about 3.000 species of snakes worldwide, but only 10 to 14% are venomous. Among South American countries, Brazil is the one with the largest number of accidents, with approximately 20.000 snakebites each year. According to the Department of Health of Brazil, the genus Bothrops are the main involved in snakebites in the country. Acute renal failure
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2010
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8. 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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9. HYBRID SYSTEM USING GAS TURBINE AND FUEL CELL FOR AERONAUTICAL APU APPLICATION
Much effort and resources are being directed to reduce emissions in the most varied sectors. Today, aviation accounts for less than 5% of human related CO2 emissions, but projections for 2050 indicate that the growth of aviation emissions risks undermining the mitigation progress achieved in other sectors. In aeronautics, increasing fuel efficiency is consid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 200904
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10. Microclimas urbanos no Plano Piloto de Brasília : o caso da superquadra 108 sul
This project intends to identify the urban micro-climate that exists on the Superquadra 108 Sul in Plano Piloto of Brasília. It has been studied, experimentally, three different spots with distinct vegetation in order to analyze the effects on the following variables: air temperature, humidity, direction and speed of wind, and superficial temperature of mat
Publicado em: 2009
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11. Controle de caos em amostras semi-isolantes de arseneto de gálio
Low frequency current oscillations have been usually investigated under the influence of the external applied bias, the temperature and the illumination. A parallel applied magnetic field has been used in the present work in order to obtain odd periodic windows and bifurcations inside them in a two dimension parameter space in a semi-insulating GaAs grown by
Publicado em: 2008
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12. The Conley index for discontinuous vector fields / O indice de Conley para campos de vetores descontinuos
The Conley index is a used as a topological invariant in the analysis of the qualitative behavior of dynamical systems. lnitially the theory was developed for continuous flows in finite dimensional spaces and later extended to the infinite dimensional setting as well as to the discrete case. ln this work, we present a Conley index theory for a class of disco
Publicado em: 2008