| 常用时频分析方法在数字地震波特征量分析中的应用 |
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| 引用本文： | 姚家骏,杨立明,冯建刚.常用时频分析方法在数字地震波特征量分析中的应用[J].西北地震学报,2011,33(2):105-110. |
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| 作者姓名： | 姚家骏 杨立明 冯建刚 |
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| 作者单位： | 1. 青海省地震局,青海西宁,810000
2. 中国地震局兰州地震研究所,甘肃兰州,730000 |
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| 基金项目： | 地震科技星火计划，地震联合基金 |
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| 摘 要： | 地震波属于非平稳信号,传统的傅立叶变换因缺乏信号局域性的信息而无法对非平衡信号进行全面描述.对此时频分析是有力的分析工具.本文简介了短时傅立叶变换(STFT)、S变换、CWD分布、ZAM分布四种时频分析方法,通过对算例及实际地震信号的分析,总结出这四种时频分析方法在分辨地震波中的应用效果及优缺点.
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| 关 键 词： | 时频分析 短时傅立叶变换 S变换 CWD分布 ZAM分布 数字地震波 |
Application of Common Time-Frequency Analysis Methods in Analyzing Characteristic Quantity of Digital Seismic Wave |
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| YAO?Jia-jun,YANG?Li-ming and FENG?Jian-gang.Application of Common Time-Frequency Analysis Methods in Analyzing Characteristic Quantity of Digital Seismic Wave[J].Northwestern Seismological Journal,2011,33(2):105-110. |
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| Authors: | YAO?Jia-jun YANG?Li-ming and FENG?Jian-gang |
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| Institution: | YAO Jia-jun1,YANG Li-ming2,FENG Jian-gang2(1.Earthquake Administration of Qinghai,Xining 810000,China,2.Lanzhou Institute of seismology,CEA,Lanzhou 730000,China) |
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| Abstract: | Seismic wave is a non-stationary signal,which can not 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 article,the short time Fourier transform,S transform,Choi-Williams distribution and Zhao-Atlas-Mark distribution are introduced briefly.Their application results and merits & demerits in distinguishing seismic waves are summarized by using the four methods to numerical exa... |
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| Keywords: | Time-frequency analysis Short time Fourier transform Wavelet transform Choi-Williams distribution Zhao-Atlas-Mark distribution Digital seismic wave |
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