Space Dimensionality
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Sobre a influência da dimensionalidade do espaço no átomo de hidrogênio relativístico / On the influence of the space dimensionality in the relativistic hydrogen aton
Faz-se uma revisão do problema da dimensionalidade do espaço entendido como um problema de Física, enfatizando que algumas leis físicas dependem fortemente deste parâmetro topológico do espaço. Discute-se o que já foi feito tanto no caso da equação de Schrödinger quanto na de Dirac. A situação na literatura é bastante controversa e, no caso esp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/01/2011
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2. Contribuições à verificação funcional ajustada por cobertura para núcleos de hardware de comunicação e multimídia. / Contribuitions to coverage-driven verification of communication and multimedia IP-cores.
Making functional verification more efficient in terms of computational and time resources is mandatory in order to maintain the evolution of digital systems. Coverage driven verification is one of the recently used alternatives for speeding up the execution of testbenches. Many approaches have been successfully applied to the functional verification of core
Publicado em: 2010
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3. An efficient system for detecting events in multimidia signals. / Um sistema eficiente de detecção da ocorrência de eventos em sinais multimídia.
Nos últimos anos tem ocorrido uma necessidade crescente de métodos que possam lidar com conteúdo multimídia em larga escala, e com busca de tais informações de maneira eficiente e efetiva. Os objetos de interesse são representados por vetores descritivos (e. g. cor, textura, geometria, timbre) extraídos do conteúdo, associados a pontos de um espaço
Publicado em: 2008
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4. Extração de atributos de forma e seleção de atributos usando algoritmos genéticos para a classificação de regiões / Shape feature extraction and feature selection using genetic algorithm for region classification
Discrimination power of earth surface targets has been continuously bettered with the increasing remote sensors technological advances. Urban systems applications are one of the areas that recently took benefit of these advances, particularly when using high resolution remote sensing data. In this scale, however, it is often necessary to take into account th
Publicado em: 2007
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5. A perspectiva no olhar: ciência e arte do renascimento
Recent academic works comes approaching fear from the perspective and as the three-dimensional space can be represent two-dimensionality. This work propose contribute in the pole of the view and in the pole of the know about the three-dimensional space across of arising from techniques of the Italian Renaissance. The inquiry gives-itself about the discovery
Publicado em: 2004
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6. Analytical results for the statistical distribution related to a memoryless deterministic walk: Dimensionality effect and mean-field models / "Resultados analíticos para as distribuições estatísticas relacionadas à caminhada determinista do turista sem memória: efeito da dimensionalidade do sistema e modelos de campo médio".
Consider a medium characterized by $N$ points whose coordinates are randomly generated by a uniform distribution along the unitary edges of a $d$-dimensional hypercube. A walker leaves from each point of this disordered medium and moves according to the deterministic rule to go the nearest point which has not been visited in the preceding $mu$ steps. This pr
Publicado em: 2004
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7. HIERARQUICAL NEURO-FUZZY MODELS BASED ON REINFORCEMENT LEARNING FOR INTELLIGENT AGENTS / NOVOS MODELOS NEURO-FUZZY HIERÁRQUICOS COM APRENDIZADO POR REFORÇO PARA AGENTES INTELIGENTES
This thesis investigates neuro-fuzzy hybrid models for automatic learning of actions taken by agents. The objective of these models is to provide an agent with intelligence, making it capable of acquiring and retaining knowledge and of reasoning (infer an action) by interacting with its environment. Learning in these models is performed by a non-supervised p
Publicado em: 2003
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8. Use of features derives from class proportions in a pixel for the multispectral classification of remote sensing images / Utilização de atributos derivados de proporções de classes dentro de um elemento de resolução de imagem ("pixel")na classificação multiespectral de imagens de sensoriamento remoto
The spectral energy collected by the Remote Sensing instrumentation is the integration, called mixture, of the energy reflected or emmited by the objects, called primary components of the mixture, contained in a picture element. The land use classes in a scene can be described in terms of these components proportions, specially for forest targets. The object
Publicado em: 1991
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9. Stochastic flows in integral and fractal dimensions and morphogenesis
The effect of dimensionality and spatial extent on the dynamics of an irreversible reaction confined to a finite system was studied by a Monte Carlo simulation. Stochastic flows on surfaces of integral and fractal dimensions and the consequences of reducing the dimensionality of the reaction space are described. As regards the timing and efficiency of chemic
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10. Food webs and the dimensionality of trophic niche space
If the trophic niche of a kind of organism is a connected region in niche space, then it is possible for trophic niche overlaps to be described in a one-dimensional niche space if and only if the trophic niche overlap graph is an interval graph. An analysis of 30 food webs, using the combinatorial theory of interval graphs, suggests that a niche space of dim
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11. Local Context Finder (LCF) reveals multidimensional relationships among mRNA expression profiles of Arabidopsis responding to pathogen infection
A major task in computational analysis of mRNA expression profiles is definition of relationships among profiles on the basis of similarities among them. This is generally achieved by pattern recognition in the distribution of data points representing each profile in a high-dimensional space. Some drawbacks of commonly used pattern recognition algorithms ste
National Academy of Sciences.
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12. Catalytic tempering: A method for sampling rough energy landscapes by Monte Carlo
A new Monte Carlo algorithm is presented for the efficient sampling of the Boltzmann distribution of configurations of systems with rough energy landscapes. The method is based on the introduction of a fictitious coordinate y so that the dimensionality of the system is increased by one. This augmented system has a potential surface and a temperature tha
The National Academy of Sciences.