基于小波包的地震波优化处理

英文篇名：Optimizing to earthquake wave based on wavelet packet
中文刊名：兰州大学学报(自然科学版)
英文刊名：Journal of Lanzhou University(Natural Sciences)
作者：石玉成 ; 邹立华 ; 李舒
英文作者：SHI Yu-cheng~1 ; ZOU Li-hua~2 ; LI Shu~1 (1.Lanzhou Institute of Seismology ; China Earthquake Administration ; Lanzhou 730000 ; China ; 2.Institute of Civil Engineering ; Fuzhou University ; Fuzhou 350108 ; China)
中文关键词：地震工程 ; 小波包 ; 地震波 ; MATLAB ; 降噪压缩
英文关键词：earthquake engineering ; wavelet packet ; earthquake wave ; matlab ; de-nosing and compressing
出版日期：2010-09-15
机构：中国地震局兰州地震研究所;福州大学土木工程学院;
年：2010
期：S1
出版单位：兰州大学学报(自然科学版)

摘要

针对FFT方法在地震波优化处理中的不足,基于改进的小波理论——小波包理论,实现了一种新的地震波优化方法.以实际记录的迁安波(南北向)为例,利用数学软件MATLAB进行编程,降低地震波高频噪声干扰和简化地震波有效特征向量,并对优化效果、不同参数的选择进行了分析.其结果表明:利用小波包可以实现对地震波的降噪和压缩,且地震波保持了应有的相似性和光滑性.
Aim at the shortage of the FFT method in optimizing to earthquake wave,a theory of wavelet packet was proposed,which is based on the improved wavelet theory.A new method of optimizing earthquake wave was come true.Taking the actual Qian'an wave record for example,programming by using mathematic software-MATLAB,so as to reduce the jam of high-frequency in earthquake wave and simplify the effective characteristic vector of the earthquake wave and further to analyze to optimizing effects and varying vector. The results proves that,it can realize de-nosing and compressing to earthquake wave by using wavelet packet and the earthquake wave maintained similarity and smoothness which should have.

引文

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