Mostrando ítems 1-10 de 264
Tuning of fuzzy inference systems through unconstrained optimization techniques
(Intelligent Engineering Systems Through Artificial Neural Networks, 2003-12-01) [Trabalho apresentado em evento]
This paper presents a new methodology for the adjustment of fuzzy inference systems. A novel approach, which uses unconstrained optimization techniques, is developed in order to adjust the free parameters of the fuzzy ...
An Experimental Study on the Effect of Temperature on Piezoelectric Sensors for Impedance-Based Structural Health Monitoring
(Sensors, 2014-01-01) [Artigo]
The electromechanical impedance (EMI) technique is considered to be one of the most promising methods for developing structural health monitoring (SHM) systems. This technique is simple to implement and uses small and ...
CMOS-based active pixel for low-light-level detection: Analysis and measurements
(IEEE Transactions on Electron Devices, 2007-12-01) [Artigo]
An analysis of the active pixel sensor (APS), considering the doping profiles of the photodiode in an APS fabricated in a 0.18 μm standard CMOS technology, is presented. A simple and accurate model for the junction capacitance ...
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 ...
Vestibular UNESP e inclusão social
(Congresso de Extensão Universitária, 2011) [Trabalho apresentado em evento]
Método experimental para determinação das capacitancias parasitas do motor de indução trifásico acionado por inversor MLP
(Sba: Controle & Automação Sociedade Brasileira de Automatica, 2012-04-01) [Artigo]
A proposta deste trabalho é apresentar uma nova metodologia para determinação experimental das capacitancias parasitas do motor de indução trifásico de rotor em gaiola. As capacitancias parasitas fazem parte do circuito ...
Experimental analysis of the feasibility of low-cost piezoelectric diaphragms in impedance-based SHM applications
(Sensors and Actuators, A: Physical, 2016-02-01) [Artigo]
Structural health monitoring (SHM) systems with damage detection based on the electromechanical impedance (EMI) method have received attention in recent decades because of the simplicity of the methodology, which is based ...
A path- and label-cost propagation approach to speedup the training of the optimum-path forest classifier
(Pattern Recognition Letters, 2014-04-15) [Artigo]
In general, pattern recognition techniques require a high computational burden for learning the discriminating functions that are responsible to separate samples from distinct classes. As such, there are several studies ...
A novel algorithm for feature selection using Harmony Search and its application for non-technical losses detection
(Computers & Electrical Engineering, 2011-11-01) [Artigo]
Finding an optimal subset of features that maximizes classification accuracy is still an open problem. In this paper, we exploit the speed of the Harmony Search algorithm and the Optimum-Path Forest classifier in order to ...
Transducer Loading Effect on the Performance of PZT-Based SHM Systems
(IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 2010-04-01) [Artigo]
In the last years, the piezoelectric transducers of lead zirconate titanate (PZT) have been widely used in structural health monitoring (SHM) systems based on the electromechanical (E/M) impedance technique. Although many ...