| 地震面波频散的数字计算——方法与试验 |
| |
| 引用本文： | 李白基,师洁珊,宋子安,曾融生. 地震面波频散的数字计算——方法与试验[J]. 地球物理学报,1977,20(04): 283-298, |
| |
| 作者姓名： | 李白基 师洁珊 宋子安 曾融生 |
| |
| 作者单位： | 国家地震局昆明地震大队 |
| |
| 摘 要： | 在108-乙型数字计算机上进行了地震面波频散处理方法的试验。包括:（1）参数固定的和可变的数值滤波;（2）测定群速度的“移动窗”和“多重滤波”技术;（3）测定相速度的互相关法。应用了快速傅氏变换计算两个台记录的地震面波的互相关函数。使用数字处理技术分析地震面波频散,除了提高计算速度和便于处理之外,还可扩大测量周期的范围至20—70秒,从此可作出对地壳参数性质的更可靠的测定。
|
| 关 键 词： | 地震面波 频散 数字计算 讯号 快速傅氏变换 田田 嚣嚣 相速度 移动窗 多重滤波 |
| 收稿时间： | 1976-09-14 |
DIGITAL PROCESSING FOR SEISMIC SURFACE WAVE DISPERSION |
| |
| LI BAI-JI,SHI JIE-SHAN,SONG ZI-AN,ZENG EONG-SHENG. DIGITAL PROCESSING FOR SEISMIC SURFACE WAVE DISPERSION[J]. Chinese Journal of Geophysics (in Chinese),1977,20(04): 283-298, |
| |
| Authors: | LI BAI-JI SHI JIE-SHAN SONG ZI-AN ZENG EONG-SHENG |
| |
| Affiliation: | The Seismological Brigade of Kunming,National Seismological Bureau |
| |
| Abstract: | An experiment of digital processing for seismic surface wave dispersion has been,carried out on the machine model 108-B. It consists of: （1） numerical filtering of both constant and variable parameters; （2） techniques of measuring group velocities by using "moving window" and "multiple filtering"; （3） cross-correlation method of measuring phase velocities. Fast Fourier transform has been applied for computing the cross-correlation of seismic surface waves for records at two stations. Beside the benefits of speed and ease of manipulation,the application of digital processing for analysing dispersed seismic waves has been proved to be valuable in increasing the measuring period range to 20-70 seconds,so that the properties of crustal parameters can be more fully exploited. |
| |
| Keywords: | |
|
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
|
点击此处可从《地球物理学报》下载全文 |
|
