|
|||||
|
|
| Gauss linear frequency modulation wavelet transforms and its application to seismic phases identification | |
| 作者姓名： | 刘希强 周惠兰 曹文海 李红 李永红 季爱东 |
| 作者单位： | SeismologicalBureauofShandongProvince，GraduateSchool，ChineseAcademyofSciences，SeismologicalBureauofWeihaiCity，SeismologicalBureauofShandongProvince，SeismologicalBureauofShandongProvince，SeismologicalBureauofShandongProvince Ji'nan250014，China，Beijing100039，China，Weihai264200，China，Ji'nan250014，China，Ji'nan250014，China，Ji'nan250014，China |
| 基金项目： | State Natural Science Foundation of China (40074007)，Science and Technology Key Project during the Ten-Year Plan(2001BA601B02-03-06) and the Natural Science Foundation of Shandong Province (Y2000E08). |
| 摘 要： | Introduction The accurate gradual change style seismic phases identification is an older new question for discussion. Wavelet transform has good localization properties in time-frequency domain, and is a effective tool to analyze seismic signal which has been applied to detection of many kinds of signal, picture processing and other fields. When a kind of new signal stack up another kind of signal, more high frequency signal components will happen at onset time of new signal. Based on the wave… |
| 收稿时间： | 28 October 2001 |
| 修稿时间： | 25 July 2002 |
Gauss linear frequency modulation wavelet transforms and its application to seismic phases identification |
|
| Liu Xi-qiang , Zhou Hui-lan , Cao Wen-hai , Li Hong , Li Yong-hong and Ji Ai-dong.Gauss linear frequency modulation wavelet transforms and its application to seismic phases identification[J].Acta Seismologica Sinica(English Edition),2002,15(6):636-645. | |
| Authors: | Liu Xi-qiang Zhou Hui-lan Cao Wen-hai Li Hong Li Yong-hong and Ji Ai-dong |
| Institution: | 1. Seismological Bureau of Shandong Province, Ji'nan 250014, China 2. Graduate School, Chinese Academy of Sciences, Beijing 100039, China 3. Seismological Bureau of Weihai City, Weihai 264200, China |
| Abstract: | Based on the characteristics of gradual change style seismic signal onset which has more high frequency signal components but less magnitude, this paper selects Gauss linear frequency modulation wavelet as base function to study the change characteristics of Gauss linear frequency modulation wavelet transform with difference wavelet and signal parameters, analyzes the error origin of seismic phases identification on the basis of Gauss linear frequency modulation wavelet transform, puts forward a kind of new method identifying gradual change style seismic phases with background noise which is called fixed scale wavelet transform ratio, and presents application examples about simulation digital signal and actual seismic phases recording onsets identification. |
| Keywords: | Gauss linear frequency modulation wavelet wavelet transform gradual change style seismic sig-nal onset identification |
| 本文献已被 CNKI 万方数据 SpringerLink 等数据库收录！ | |