Information Entropy An
Mostrando 13-24 de 58 artigos, teses e dissertações.
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13. Análise de imagem polarimétrica TerraSAR-X para classificação de uso e cobertura da terra na porção sudoeste da Amazônia Brasileira / TerraSAR-X image for classification the land use and land cover in the southwest portion of the Brazilian Amazon
The objective of this study is to analyze the potential use of images from satellite TerraSAR-X, at StripMap acquisition mode, to map and identify the land use and land cover (LULC) in the southwestern Brazilian Amazon. Classifiers based on statistical functions for maximum likelihood (ML) method and based on frequency-based contextual and neural network cla
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2011
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14. Rényi entropy and cauchy-schwartz mutual information applied to mifs-u variable selection algorithm: a comparative study
This paper approaches the algorithm of selection of variables named MIFS-U and presents an alternative method for estimating entropy and mutual information, "measures" that constitute the base of this selection algorithm. This method has, for foundation, the Cauchy-Schwartz quadratic mutual information and the Rényi quadratic entropy, combined, in the case
Pesquisa Operacional. Publicado em: 2011-12
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15. Distribuições em série de potências modificadas inflacionadas e distribuição Weibull binominal negativa / Inflated modified power serie distribution and Weibull negative binomial
In this paper, some result such as moments generating function, recurrence relations for moments and some theorems of the class of modified power series distributions (MPSD) proposed by Gupta (1974) and of the class of inflated modified power series distributions (IMPSD) both at a different point of zero as the zero point are presented. The standard Poisson
Publicado em: 2011
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16. Note on semiclassical uncertainty relations
An important manifestation of the Uncertainty Principle, one of the cornerstones of our present understanding of Nature, is that related to semiclassical localization in phase-space. We wish here to add some notes on the subject with reference to the canonical harmonic oscillator problem, with emphasis in the concepts of semiclassical Husimi distributions, t
Brazilian Journal of Physics. Publicado em: 2009-08
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17. Aspectos de física estatística na evolução e no crescimento molecular. / Aspects of statistical physics on evolution and in molecular growth.
Molecular Evolution, stimulated and supported by Evolution Synthetic Theory, became essential to understand evolution of life. Genomic growth was responsible to increase the capacity of storage information and to stability of the molecule; besides, it was also submitted to natural selection. Using amplification-mutation-selection methodology, such as SELEX (
Publicado em: 2009
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18. Aspectos da transmissão e processamento de informação em canto de anuros / Features of Transmition and processing of information in anuran vocalization
Biological systems interact with their environment in many forms. The way these interactions occur can be assigned, ultimately, as the transmission of messages. Transmission of messages by sound waves, in animals, is a well studied subject because they are an important way of communication used by many groups. The objective of the present work is to verify w
Publicado em: 2009
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19. Topologia, Simetria e transições de fase em Modelos de Spin
We use a topological approach to describe the frustration- and field-induced phase transitions exhibited by the infinite-range XY model on the AB2 chain, including noncollinear spin structures. For this purpose, we have computed the Morse number and the Euler characteristic, as well as other topological invariants, which are found to behave similarly as func
Publicado em: 2009
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20. Distribuição potencial e impacto de mudanças climáticas sobre a praga de girassol Chlosyne lacinia (Lepidoptera: Nymphalidae) / Potential distribution and climate change impact over the sunflower pest Chlosyne lacinia (Lepidoptera: Nymphalidae)
The existence of global climate change caused by anthropogenic impacts and the importance of predicting its biological effects have revived the interest in understanding abundance and distribution determining factors. Several methods that allow the creation of climate based ecological niche models can be used to predict species potential distribution and the
Publicado em: 2009
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21. Ecologia e modelagem da distribuição dos sítios de nidificação do jacaré-açu (Melanosuchus niger) em uma área de várzea da Amazônia Central, Brasil
The black caiman, Melanosuchus niger, is primarily an Amazonian species, its largest populations are associated mainly with interior várzea areas, but its nesting ecology related with these hydrologic dynamic environments is still poorly understood. The objectives of this study were related to the generation of information on the nesting ecology of this spe
Publicado em: 2009
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22. Biogeographical influence on bird species sensitivity to habitat fragmentation / Influência de fatores biogeográficos sobre a sensibilidade das espécies de aves à fragmentação do habitat
Species distribution models (SDM) is a quite new technique that has been used in many fields of natural sciences. Nevertheless, as problem inherent of a new technique, there is still a lot of questions about the most appropriated manner of its use and application. As the SDM consists a powerful tool with high potential to be used use in many fields of resear
Publicado em: 2009
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23. Caracterização estrutural da forma recombinante da proteína Pb27 de Paracoccidioides brasiliensis
COITINHO, J. B. Structural characterization of recombinant form of the protein Pb27 from Paracoccidioides brasiliensis. 2009. Dissertation (Masters). Departamento de Bioquímica e Imunologia. Universidade Federal de Minas Gerais. Belo Horizonte, 2009. Paracoccidiodomycosis (PCM) is one of the most important systemic mycoses in Brazil. The etiologic agent of
Publicado em: 2009
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24. A numerical study of the Kullback-Leibler distance in functional magnetic resonance imaging
The Kullback-Leibler distance (or relative entropy) is applied in the analysis of functional magnetic resonance (fMRI) data series. Our study is designed for event-related (ER) experiments, where a brief stimulus is presented and a long period of rest is followed. In particular, this relative entropy is used as a measure of the "distance" between the probabi
Brazilian Journal of Physics. Publicado em: 2008-03