5Yang H T and Liao C C. A de-noising scheme for enhancing wavelet-based power quality monitoring system [ J ]. IEEE Trans. on Power Delivery ,2001,16( 3 ) :353 - 359.
5Ryu CY, Nam KC, Kim SC,et al.Comparison of digital filters with wavelet multiresotution filter for etectrogastrogram [C]. South Korea: Proceedings of the Second Joint EMBS/ BMES Conference, 2002: 23-26.
6Charles K Chui. An introduction of wavelet[M]. Los: Academic Press, 1992.
7David L. Donoho.De-noising by soft-thresholding. IEEE Transactions on Information Theory . 1995
