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Partial discharge (PD) is the initial sign of power capacitor insulation failure, and an effective extraction and analysis method of PD signal in power capacitor can improve the effectiveness of the on-line fault monitoring. The method which based on wavelet threshold denoising and mathematical morphology alternate mixing filter is put forward in this paper. First, the PD signal which includes noise...
A signal preprocessing system has been designed by the authors. It uses an adaptive filter to eliminate the noise caused by the heart sound from the breath sound signal. Pure breath sound can be obtained and provided to the analysis and classification system. This results in a more precise classification of the breath sound.<<ETX>>
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