直接用于进行河流直线基流分割，界面友好，参数修改方便-Directly used for river base flow separation friendly interface

tvfemd可进行序列分解，比emd分解效果可能要好一点。(he sifting process is completed using a time varying filter technique.The local cut-off frequency is adaptively designed by fully facilitating the instantaneous amplitude and frequency infor