| 基于小波包变换的地震数据时频分析方法 |
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| 引用本文： | 刘希强,周蕙兰,李红.基于小波包变换的地震数据时频分析方法[J].西北地震学报,2000,22(2):143-146,176. |
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| 作者姓名： | 刘希强 周蕙兰 李红 |
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| 作者单位： | 1. 中国科学技术大学研究生院,北京,100039
2. 山东省地震局,山东,济南,250014 |
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| 基金项目： | 国家自然科学基金重点项目!(49734 15 0 )，地震科学联合基金资助项目!(1980 6 1) |
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| 摘 要： | 介绍了瞬时频率的概念和瞬态谱的小波包计算方法，并结合时间域模拟信号给出了其时频分布，结果表明，小波包变换可准确技术地震信号的时变特征，值得推广应用。
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| 关 键 词： | 地震数据 小波包变换 瞬时频率 时频分布 |
| 收稿时间： | 1999/4/26 0:00:00 |
THE TIME-FREQUENCY ANALYSIS METHOD ABOUT SEISMIC DATA BASED ON WAVELET PACKET TRANSFORM |
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| LIU Xi-qiang,ZHOU Hui-lan and LI Hong.THE TIME-FREQUENCY ANALYSIS METHOD ABOUT SEISMIC DATA BASED ON WAVELET PACKET TRANSFORM[J].Northwestern Seismological Journal,2000,22(2):143-146,176. |
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| Authors: | LIU Xi-qiang ZHOU Hui-lan and LI Hong |
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| Institution: | Graduate School, University of Science and Technology of China, Beijing 100039, China,Graduate School, University of Science and Technology of China, Beijing 100039, China and Seismological B ureau of Shandong Province, Jinan 250014, China |
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| Abstract: | The conception of transient frequency and calculation method of wavelet packet are introduced,and time frequency distribution about simulation and actual seismic signals is given.The results indicates that wavelet packet transform may be used to describe the characteristics of seismic signals at any moment and is worth applying to processing seismic signals. |
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| Keywords: | Seismic data Wavelet packet transform Transient frequency Time frequency distribution |
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