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| 最优小波包变换在地震信号去噪中的应用 | |
| 引用本文： | 张瑞红,林大超,乔兰.最优小波包变换在地震信号去噪中的应用[J].地震研究,2011,34(3):358-364. |
| 作者姓名： | 张瑞红 林大超 乔兰 |
| 作者单位： | 1. 北京科技大学土木与环境工程学院,北京100083;华北科技学院土木工程系,北京101601 2. 华北科技学院土木工程系,北京,101601 3. 北京科技大学土木与环境工程学院,北京,100083 |
| 基金项目： | 国家科技支撑计划课题(2007BAS18B01) |
| 摘 要： | 应用最优小波包变换,采用取决于节点噪声时频特征的相关阈值,对模拟地震波到达的加噪合成信号、SDAES数字声发射仪采集的微震实验信号、NIED观测台站记录的日本2007年能登半岛地震信号进行去噪,并和基于小波变换的其他方法进行了去噪效果比较.结果表明,该方法获得的信号信噪比(SNR)高、失真低,体现出了总体优越性. |
| 关 键 词： | 地震信号 小波包变换 最优基 去噪 相关阈值 |
Application of the Optimum Wavelet Packet Transform in Seismic Signals De-noising |
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| ZHANG Rui-hong,LIN Da-chao,QIAO Lan.Application of the Optimum Wavelet Packet Transform in Seismic Signals De-noising[J].Journal of Seismological Research,2011,34(3):358-364. | |
| Authors: | ZHANG Rui-hong LIN Da-chao QIAO Lan |
| Institution: | ZHANG Rui-hong1,2,LIN Da-chao2,QIAO Lan1(1.Civil and Environmental Engineering School,University of Science and Technology Beijing,Beijing 100083,China)(2.Department of Civil Engineering,North China Institute of Science and Technology,Beijing 101601,China) |
| Abstract: | We apply the node-dependent threshold relative to the characteristics of the time-frequency of the noise to the optimum Wavelet Packet Transform(WPT) method to denoise a synthetic noisy signal of the arrival of the simulative seismic wave,an experimental micro-seismic signal collected by a digital acoustic emission instrument,SDAES,and a seismic signal of 2007 Noto Hanto Earthquake in Japan recorded at NIED observatory.We find that the signal denoised by the optimum WPT method has a higher signal-to-noise r... |
| Keywords: | seismic signal WPT best basis denoising dependent threshold |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |