time-frequency analysis technique 基本例句 时频分析技术 Much remains to be done, then, but we anticipate that the same results will be generated by the HHT method to improve the resolution of the time and frequency domains.而本篇文章则是利用时频分析技术，以共振主频随时间之变化来探讨局部地区土层之场址效应，尤其是强震与弱震间土壤共振主频之差异。