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A diagnosis method basing on neural network classifier, genetic algorithm (GA) and wavelet transform is proposed for a pulse width modulation voltage source inverter. It is used to detect and identify the transistor open-circuit fault. BP neural network (BPNN) is capable of recognition. However, it has shortcomings obviously. These are just advantages of GA, which has ability of global search. Thus...
In order to improve the detection rate of T wave, and to solve the problem that the back propagate neural network (BPNN) is invalid when these initial weight and threshold values of BP neural network are chosen impertinently (Objective), Genetic Algorithms (GA)'s characteristic of getting whole optimization value was combined with BP's characteristic of getting local precision value with gradient...
Electronic-nose was used on detecting the pernicious gases in piggery. The feasibility of improving the electronic-nose recognition model by using a feature extraction method with wavelet transform and genetic algorithm (GA) was discussed by aiming on cross-sensitivity of gas sensors. The experiment result shows that, the feature samples extracted by the new method, these samples were inputted in...
An integrated BP neural network and particle swarm optimization (PSO) for load forecasting method is presented in this paper. From the signal analysis point of view, load can also be considered as a linear combination of different frequencies. The proposed approach decomposes the historical load into an approximate part and several detail parts through the wavelet transform. Then based on the maximum...
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