After introducing the brief theories of wavelet analysis and Hibert Huang Transform (HHT), several signal data were analyzed by using HHT and wavelet analysis methods.

• 在简要介绍时程信号的小波分析和Hilbert Huang变换 (HHT)理论的基础上 ；通过地震波和其它时程信号实例 ；对比分析了小波变换和HHT变换结果 .