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Tranformada wavelet e redes neurais artificiais na análise de sinais relacionados à qualidade da energia elétrica
(Universidade Federal de Santa Maria, 2009-02-10)
This work presents a different method for power quality signal classification using the principal components analysis (PCA) associated to the wavelet transform (WT). The standard deviation of the detail coefficients and ...
Integração de pilhas de células a combustível com outras fontes alternativas de energia
(Universidade Federal de Santa Maria, 2009-03-31)
This dissertation presents a project of a integrated system with distinct energy generating modules using a wind generator, photovoltaic generator, fuel cells stack
(FCs) and an accumulator of energy formed by a bank of ...
Contribuição ao estudo de estratégias de modulação aplicadas a conversores multiníveis com diodos de grampeamento
(Universidade Federal de Santa Maria, 2009-04-30)
This dissertation deals with modulation techniques for multilevel diode clamped converters.
The major challenge to be overcome by modulation strategies to these converters
is the balance of the dc-link voltage capacitors, ...
Métodos para otimização dos ajustes dos reguladores de tensão e zonas de tap em sistemas de distribuição
(Universidade Federal de Santa Maria, 2009-08-07)
The new regulations in the electric sector utilities have have requested greater efficiency and quality both in terms of continuity and in conformity of the energy
supplied. Electrical equipments quality, efficiency and ...
Análise comparativa de conversores monofásicos aplicados a correção de fator de potência
(Universidade Federal de Santa Maria, 2009-08-12)
This work presents a study and a comparative analysis of high power single-phase converter applied to power factor correctioii in according to the international standards IEC
61000-3-4 (harmonics limitation) and CISPR 22 ...
Uma nova metodologia de projeto para otimização do volume do converosr boost PFC
(Universidade Federal de Santa Maria, 2009-03-27)
This work investigates the influence of operation point (Δi @ fs) in the final volume of PFC boost converter. The boost inductor, EMI filter and thermal heatsink are the elements which main influences in the converter ...
Dos primeiros escritos sobre administração escolar no Brasil aos escritos sobre gestão escolar: mudanças e continuidades
(Universidade Federal de Santa Maria, 2009-01-26)
Face to the changes in education, it is necessary to reflect on the field in which such
innovations are placed in order to understand and act in these spaces with
consciousness. Accordingly, this research presents the ...
A inclusão das TICS no ensino aprendizagem de Ciências Biológicas no ensino médio
(Universidade Federal de Santa Maria, 2009)
The present article presents some considerations on the inclusion of the technological resources in the process teach-learning of Biological Sciences, pointing with respect to the change possibility of positive form in the ...
O efeito da ginástica de academia nas capacidades perceptivo-motoras e na percepção de competência física de mulheres
(Universidade Federal de Santa Maria, 2009)
Relação educação e saúde: uma abordagem sobre o excesso de consumo de açúcar pelo jovem
(Universidade Federal de Santa Maria, 2009-04-08)
School plays an important role in promoting good eating habits as it is a place of great interaction between youngsters and educators. In order to have a more effective educational action, schools need the support of family, ...