Papers by Author: Pan Zhang

Abstract: Based on the mode mixing problem which exists in EMD(Empirical Mode Decomposition)method, this paper provides two ways to solve this problem.First is to increase the sampling frequency, add a characteristic wave with high amplitude and frequency in the process of signal analysis,then put the FFT transformation on the IMF(intrinsic mode function) which derives from EMD method,while in the process of transformation,binary scaling to the sampling frequency to adapt to the changes of each IMF component, making the spectrum more clear and the analysis of the data with the relevant frequency components more careful.The second is EEMD ,which is proposed in recent years.We use this method to deal with the signal ,after that,then use EMD method to analyse it,which will get a good result.While a comparison with the two methods and point out the different ranges of applications.

Abstract: Insulator leakage current has very large amount of data, so that increased the burden of data storage and system’s transmission. In order to solve this problem, first, analysis the data with wavelet transform, and then using Fractal Interpolation and Collage Theorem to compress and recovery the data. Signal can be well restored with very little data. The results show that, using wavelet transform and fractal interpolation method to compress data, large amount of data can be reduced during transmission, not only reduces hardware requirements, but also improve the compression efficiency.