Now showing items 1-10 of 125
Piezoelectric transducers assessed by the pencil lead break for impedance-based structural health monitoring
(Ieee Sensors Journal, 2015-02-01) [Artigo]
The pencil lead break (PLB) is a well-known method for characterizing acoustic emission sensors. In this paper, we analyze the effectiveness of this method in characterizing piezoelectric transducers for structural health ...
Desenvolvimento e avaliação de desempenho de um sistema de posicionamento automático para painéis fotovoltaicos
(Energia na agricultura, 2010) [Artigo]
The need of using electric energy in localities not attended by the utilities, with efficiency, reliability and accessible cost, has motivated the development of this research, which main approach was photovoltaic systems ...
Photodetection with gate-controlled lateral BJTs from standard CMOS technology
(IEEE Sensors Journal, 2013-04-08) [Artigo]
The silicon-based gate-controlled lateral bipolar junction transistor (BJT) is a controllable four-terminal photodetector with very high responsivity at low-light intensities. It is a hybrid device composed of a MOSFET, a ...
Framework for analysis and representation of external systems for online reactive-optimisation studies
(IEE Proceedings: Generation, Transmission and Distribution, 2005-11-01) [Artigo]
The paper proposes a framework for the analysis and representation of external systems for online optimisation studies. The basis for this framework is the equivalent OPF (EOPF), an optimisation model obtained by partitioning ...
Resolvendo problemas de fluxo de potência ótimo DC através de uma rede de hopfield modificada
(Sba: Controle & Automação Sociedade Brasileira de Automatica, 2004-12-01) [Artigo]
Inúmeras abordagens neurais têm sido propostas na literatura para resolver problemas de Fluxo de Potência Ótimo DC. Mais especificamente, a rede de Hopfield é o modelo de rede mais utilizado nesses tipos de problemas. A ...
Analysis of the application of the minimum quantity lubricant - MQL technique in the grinding process
(Industrial Diamond Review, 2007-01-01) [Artigo]
The cutting time with abrasive discs can be reduced by the control of the cutting speed
(Technical Paper - Society of Manufacturing Engineers. MR, 1997-12-01) [Artigo]
This paper presents an experimental study on the life of abrasive discs in cut-off type operations with two conditions of cutting speed. The cutting time is shown with a comparative analysis of the cutting speed.
A neural approach to evaluate the effect of lightning in power transformers
(International Journal of Emerging Electric Power Systems, 2009-10-19) [Artigo]
This paper proposes the application of computational intelligence techniques to assist complex problems concerning lightning in transformers. In order to estimate the currents related to lightning in a transformer, a neural ...
Predictor-Corrector Primal-Dual Interior Point Method for Solving Economic Dispatch Problems: A Postoptimization Analysis
(Mathematical Problems in Engineering, 2012-01-01) [Artigo]
This paper proposes a predictor-corrector primal-dual interior point method which introduces line search procedures (IPLS) in both the predictor and corrector steps. The Fibonacci search technique is used in the predictor ...
Aplicação de redes neurais na estimação da temperatura interna de transformadores de distribuição imersos em óleo
(Sba: Controle & Automação Sociedade Brasileira de Automatica, 2002-09-01) [Artigo]
Neste artigo, os sinais de temperatura ambiente e de carregamento de transformadores de distribuição imersos em óleo são aplicados em uma arquitetura de redes neurais artificiais com o objetivo de estimar a temperatura ...