小波(Wavelet)这一术语，顾名思义，“小波”就是小区域、长度有限、均值为0的波形。所谓“小”是指它具有衰减性；而称之为“波”则是指它的波动性，其振幅正负相间的震荡形式。-Wavelet (Wavelet) the term, as the name implies, the "wavelet" is a small area, length limited waveform, the mean of 0. The so-called "small" means it is capable of attenuating　called "wave" refers to the volatility, the amplitude of plus or minus the white form of the shock.