说明：  HHT精华讨论，对运用ＨＨＴ进行数据分析时遇到的问题有详细的解答，是学习ＨＨＴ不可或缺的资料
(HHT essence discussion, this paper analyzed the data using HHT is there detailed solution to the problems encountered in the process of, is indispensable to study HHT data)