Fractal Model
Mostrando 1-12 de 52 artigos, teses e dissertações.
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1. Studying the effect of Building Block Shape on Sierpinski tetrahedron fractal antenna behavior using FDTD-equivalent electric circuits
This research aims to study the effect of the modification in the Building Block Shape (BBS) on the frequency response of Sierpinski three dimensional pre-fractal antenna using conventional circuit analysis. Three different shapes of BBS's are used to build the antenna. The surface current is analyzed and compared for every BBS. A simple model was devised us
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2012-06
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2. Fractal analysis of agricultural nozzles spray
Fractal scaling of the exponential type is used to establish the cumulative volume (V) distribution applied through agricultural spray nozzles in size x droplets, smaller than the characteristic size X. From exponent d, we deduced the fractal dimension (Df) which measures the degree of irregularity of the medium. This property is known as 'self-similarity'.
Scientia Agricola. Publicado em: 2012-02
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3. A SOFTWARE COMPONENT MODEL WITH SUPPORT FOR MULTIPLE VERSIONS / UM MODELO DE COMPONENTES DE SOFTWARE COM SUPORTE A MÚLTIPLAS VERSÕES
Diversos modelos de componentes de software para sistemas distribuídos já foram propostos pela indústria e pela academia, tais como Fractal, CCM, COM, OpenCOM, LuaCCM, e SCS. Uma das principais vantagens comumente atribuídas à abordagem de desenvolvimento baseado em componentes de software é o melhor suporte à extensibilidade independente (independent
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/03/2011
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4. UTILIZAÇÃO DE MODELO MATEMÁTICO NA BUSCA DO MANEJO SUSTENTÁVEL DAS PASTAGENS NATURAIS / USE OF MATHEMATICAL MODEL IN THE SEARCH OF SUSTAINABLE MANAGEMENT OF NATURAL GRASSLANDS
O objetivo deste trabalho foi modelar em uma escala espaço-temporal a dinâmica vegetacional de pastagens naturais caracterizada por tipos funcionais quando submetidas a diferentes distúrbios, visando predizer padrões na vegetação de inventários futuros pela análise da dimensão fractal associada ao modelo de autômatos celulares. Assim, inicialmente
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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5. Análise fractal da vascularização da membrana corioalantóide de embriões de codornas japonesas (Coturnix japonica submetidas a campo eletromagnético de 60 Hz.
The formation of vascular network is governed mainly by two processes, vasculogenesis and angiogenesis. In vasculogenesis, the angioblastic which are the precursors of endothelial cells arising in germ layer (mesoderm) of the yolk sac (outside the embryo body). These angioblastic organize themselves to form blood islands, differing in blood vessels where the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2010
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6. Indices of movement behaviour: conceptual background, effects of scale and location errors
A fundamental step in the emerging Movement Theory is the description of movement paths, and the identification of its proximate and ultimate drivers. The most common characteristic used to describe and analyze movement paths is its tortuosity, and a variety of tortuosity indices have been proposed in different theoretical or empirical contexts. Here we revi
Zoologia (Curitiba). Publicado em: 2010-10
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7. Geração de meios porosos fractais com uma nova equação do tipo Kozeny-Carman / Generation of fractal porous media with a new equation of the type Kozeny-Carman
The relationship between porosity and permeability attracts the attention of researchers and engineers because of their various applications. Such as in utilization of lters, waterproof materials, natural reservoirs, for example.Throughout the twentieth century, several works proposed in the literature they study the relation porosity-permeability, and much
Publicado em: 2010
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8. Um modelo de compressão de imagens digitais baseado em quantização vetorial e transformações afins
The fractal compression is an emerging digital image coding technique which explores the self-similarity present in digital images, showing good fidelity between the original image and the reconstructed image, achieving high compression rates. However it has some weaknesses and because it demands a considerable computational complexity commonly is used the a
Publicado em: 2008
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9. Análise fractal da vasculatura arteriolar e venular da retina em pessoas sem doença ocular
Although it has been suggested that retinal vasculature is a diffusion-limited aggregation (DLA) fractal, no study has been dedicated to standardizing its fractal analysis. The aims of this project was to standardize a method to estimate the fractal dimensions of retinal vasculature and to characterize their normal values; to determine if this estimation is
Publicado em: 2008
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10. Correlação de velocidade em um modelo de corrosão
Surface growth is an area whose methods apply to many systems on nature. On this work we review the growth process, with emphasis on the general growth relations, such as the KPZ equation and on the critical exponents universality. As a practical example we study a model where a corrosive liquid acts over a solid. Our main contribution is shown on chapter 3
Publicado em: 2008
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11. EconofÃsica: dinÃmica de agentes heterogÃneos no estudo da volatilidade
We perform a computer simulation study for the volatility within the context of multi-agent dynamics in financial markets. We consider the USDF model of price formation on square lattices and introduce the parameter pF for the fraction of fundamentalist agents present in the system. Then we analysis the influence of these agents on the volatility. The result
Publicado em: 2008
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12. Estudos do transporte de partÃculas brownianas interagentes e de transiÃÃes de fases em modelos de spin quÃnticos
Nesta Tese, sÃo investigados dois temas de interesse atual, o transporte de partÃculas brownianas interagentes e as transiÃÃes de fase em sistemas magnÃticos quÃnticos. No primeiro, o transporte de partÃculas brownianas interagentes sujeitas a um potencial de substrato do tipo catraca foi investigado numericamente atravÃs da dinÃmica de Langevin. Me
Publicado em: 2008