• 责任者：Yao Jiajun (Earthquake Administration of Qinghai ; Xining 810000 ; China) ; Yang Liming
• 刊名：Northwestern Seismological Journal
• 出版年：2011
• 卷期：33(2)
• 关键词：时间域分析 ; time-domain analysis ; 频率域分析 ; frequency domain analysis ; 弹性波 ; elastic waves
• 页码：p.105-110
• 图表：6 illus., 1 table, 15 refs.
• 分类号：1600
• issnNo：ISSN1000-0844
• isbnNo：CN62-1048/P

Seismic wave is a non-stationary signal, which cannot be analyzed comprehensively by classical Fourier transform because of the lack of local information. To non-stationary signal, time-frequency analysis is a powerful analysis tool. In this paper, the short time Fourier transform, S transform, Choi-Williams distribution and Zhao-Atlas-Mark distribution are introduced. The results and merits and demerits in distinguishing seismic waves are summarized by using the four methods.