Power Estimator
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Multiple comparison for binomial parameters using bootstrap / ComparaÃÃes mÃltiplas para parÃmetros binomiais utilizando bootstrap
The multiple comparisons methods and the analysis of variance are not reliable alternatives for comparing two or more binomial proportions, when the experiments have only Bernoulli trails. Although, this comparison can be made using the intensive computational techniques named infinite bootstrap. This work aimed to evaluate the performance of two binomial pr
Publicado em: 2006
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14. Observability analysis for state and parameter estimator / Análise de observabilidade para o estimador de estados e parâmetros do sistema elétrico
Neste trabalho propõe-se um método de análise de observabilidade para estimação de estados e parâmetros em sistemas elétricos de potência, baseado nas equações normais. O método fundamenta-se na fatoração triangular da matriz ganho aumentada e nos conceitos de caminhos de fatoração. O mesmo utiliza rotinas já existentes no processo de estima�
Publicado em: 2005
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15. Tecnicas autodidatas e soluções de baixa complexidade para equalização e estimação turbo
This work concerns the use of iterative receivers, which jointly perform equalization, decoding and channel estimation, to mitigate the impairments introduced by the transmission medium into the transmitted signal. First, we make a comparative study of exponential-and reduced-complexity turbo equalizers and establish the advantages and the limitations of eac
Publicado em: 2005
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16. RADIOLOCALIZAÇÃO DE TERMINAIS DE COMUNICAÇÕES MÓVEIS / RADIOLOCATION OF MOBILE COMMUNICATIONS TERMINALS
This work addresses the radiolocation problem of a moving terminal in a cellular mobile communications environment. New alternatives are developed for position estimation, assuming that the Time of Arrival (ToA) measurements obtained from radio link are corrupted by additive noise and have positive mean error during random periods of time due to the non-line
Publicado em: 2004
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17. Um algoritmo para estimação de estado em alimentadores de distribuição de energia elétrica com base no método da soma de potências
Most algorithms for state estimation based on the classical model are just adequate for use in transmission networks. Few algorithms were developed specifically for distribution systems, probably because of the little amount of data available in real time. Most overhead feeders possess just current and voltage measurements at the middle voltage bus-bar at th
Publicado em: 2003
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18. Desenvolvimento de interfaces graficas para centros de controle de energia eletrica
This work is about the study of methods and necessary requirements for the implementation of graphical user interfaces in power systems control centers, that make possible the visualization of the state of electric power systems and data gathered from real time electric network analysis functions (like the state estimator, security assessment and the on-line
Publicado em: 2001
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19. DETECÇÃO E IDENTIFICAÇÃO DE ANORMALIDADES NA ESTIMAÇÃO DINÂMICA DE ESTADO EM SISTEMAS DE POTÊNCIA / DETECTION AND IDENTIFICATION OF ANOMALIES IN POWER SYSTEM DYNAMIC STATE ESTIMATION
This work presents a comparison between the performance of dynamic and tracking estimators, in power systems operating under quasi-static conditions, concerning their characteristics of forecasting and filtering. From this comparison, a new dynamic estimator which incorporates the main advantages of the previous estimators is proposed. Also, a new scheme of
Publicado em: 1987
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20. Testing Differentiation in Diploid Populations
We examine the power of different exact tests of differentiation for diploid populations. Since there is not necessarily random mating within populations, the appropriate hypothesis to construct exact tests is that of independent sampling of genotypes. There are two categories of tests, F(ST)-estimator tests and goodness of fit tests. In this latter category
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21. Testing Heterozygote Excess and Deficiency
Currently used tests of Hardy-Weinberg proportions do not take into account the nature of the alternative hypothesis, which is generally a heterozygote deficiency. Different exact tests, appropriate for small sample size and large number of alleles, are proposed in this perspective, and their properties are evaluated by power comparisons. Some tests are foun