说明：  多小波是矢量滤波器，所以处理数据之前先进行预滤波，预滤波的好坏影响小波的性能。平衡多小波的出现避免了预滤波，越来越受到中外学者的青睐。
(Multiwavelet filter is vector, so before you deal with data pre-filtering, the good and bad effects of pre-filtering properties of wavelets. Balanced Multiwavelet avoid the emergence of pre-filtering, more and more Chinese and foreign scholars of all ages.)