Vector Space Model
Mostrando 13-24 de 47 artigos, teses e dissertações.
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13. Guias de onda com um ambiente para testes de uma eletrodinâmica com violação das simetrias de Lorentz e CPT / Waveguides as a way of testing an electrodynamics with broken Lorentz and CPT symmetries
We study a CPT- and Lorentz-odd electrodynamics in (3+1) dimensions, obtained by adding a Chern-Simons-like term to the usual Maxwell model, as described by the radiation sector of the Standard Model Extension. Once this term is proportional to a constant background "4-vector", (kAF), wich selects a preferred direction in the spacetime (breaking its isotropy
Publicado em: 2010
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14. 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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15. Método de avaliação de processo de negócio habilitado por tecnologia da informação
A crescente integração entre a tecnologia da informação (TI) e os processos de negócio das organizações públicas e privadas estimulou a realização de pesquisa para desenvolver método com potencial de avaliar o desempenho e a maturidade dos processos de negócio habilitados por tecnologia da informação. Foram realizadas buscas, abrangendo onze ba
Publicado em: 2010
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16. Model selection, estimation and forecasting in VAR models with short-run and long-run restrictions
We study the joint determination of the lag length, the dimension of the cointegrating space and the rank of the matrix of short-run parameters of a vector autoregressive (VAR) model using model selection criteria. We consider model selection criteria which have data-dependent penalties for a lack of parsimony, as well as the traditional ones. We suggest a n
Publicado em: 05/02/2009
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17. Influência das taxas de juros internacionais sobre volume de operações de crédito externo no Brasil : aplicação do método de regressão não-paramétrica com estimadores de núcleo
The influence of interest on the amount of credit is an important topic in economic. In fact, it has attracted interest of several authors who have made use of parametric statistical models (Topel, 1988; Vivacqua, 2007, among others). This dissertation presented to the analysis of the influence of international interest rates on the volume of foreign credit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/02/2009
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18. Development of Space Vector PWM usin nonorthogonal reference frame for multilevel inverter voltage source in FPGA / Implementação do algoritmo da Modulação Vetorial usando coordenadas móveis não-ortogonais em Field-programmable Gate Array para inversores multiníveis fonte de tensão
This work presents the implementation and analysis of Space Vector PWM algorithm using non-orthogonal moving reference frame for diode clamped multilevel inverter in Field Programmable Gate Array (FPGA). In this algorithm, the non-orthogonal reference voltage is obtained according to the sector where the Reference Voltage (V*) lies. From the triangle identif
Publicado em: 2009
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19. Shares of education in environmental health surveillance for control of dengue in the district of Cruise Peixoto, Uberlândia, Minas Gerais, Brazil, 2008 / Ações de educação na vigilância ambiental em saúde para controle da dengue no distrito de Cruzeiro dos Peixotos, Uberlândia, Minas Gerais, Brasil, 2008
Dengue is a disease spread in tropical regions of the world where the climatic conditions associated with bad habits of the population, favor the presence of the vector and the virus, allowing the endemicity of the disease. Humans, the virus, the vector and the shelters of this vector are facts represented by the social space environment which, when associat
Publicado em: 2009
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20. Molecular and structural analysis of maltose binding protein (MalE) of Xanthomonas axonopodis pv citri. / Análise molecular e estrutural da proteína ligadora de maltose (MalE) de Xanthomonas axonopodis pv. citri.
Maltose uptake in bacteria is mediated by an ABC transporter comprising a substrate binding protein (MalE), two transmembrane proteins, and one ATPase. In the present study, we describe the cloning, expression and biochemical as well as structural analyses of the MalE protein of the phytopagen Xanthomonas axonopodis pv citri (Xac). The malE gene of Xac was c
Publicado em: 2009
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21. The computation of pitch with vectors
A pitch model is proposed which is supported by a vector representation of tones. First, an algorithm capable of performing the vector addition of the spectral components of two-tone harmonic complexes is introduced which initially converts the amplitude, frequency, and phase (AFP) parameters into coordinates of the here introduced quotient, distance in octa
Journal of the Brazilian Computer Society. Publicado em: 2008-09
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22. Analysis of the Clustering Algorithms for the Databases / Análise de Algoritmos de Agrupamento para Base de Dados Textuais
The increasing amount of digitally stored texts makes necessary the development of computational tools to allow the access of information and knowledge in an efficient and efficacious manner. This problem is extremely relevant in biomedicine research, since most of the generated knowledge is translated into scientific articles and it is necessary to have the
Publicado em: 2008
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23. Melting rho meson and thermal dileptons
We first give a brief survey of theoretical evaluations of light vector mesons in hadronic matter, focusing on results from hadronic many-body theory. We emphasize the importance of imposing model constraints in obtaining reliable results for the in-medium spectral densities. The latter are subsequently applied to the calculation of dilepton spectra in high-
Braz. J. Phys.. Publicado em: 2007-06
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24. ANÁLISE DE AMPLITUDES DO DECAIMENTO D+ KS(PI)-(PI)+(PI)+ NO EXPERIMENTO FOCUS / AMPLITUDE ANALYSIS OF THE DECAY D+ K (PI)-(PI)+(PI)+ IN FOCUS EXPERIMENT
This thesis is devoted to the study of the decay D+ KS(pi)− (pi)+(pi)+ with data collected from the FOCUS experiment, at Fermilab. The final state composed of 4 pseudo-scalars can be produced through a number of resonant sub-structures. The purpose of this analysis is to find the contributing intermediate states by measuring their relative strenghts an
Publicado em: 2007