English

应用科学学报 ›› 1997, Vol. 15 ›› Issue (3): 325-334.

• 论文 • 上一篇    下一篇

阻尼加权地震走时层析成像迭代算法及工程应用

宋林平1, 刘浩吾1, 沙椿2, 宋正宗2   

  1. 1. 四川联合大学;
    2. 电力工业部成都勘测设计院
  • 收稿日期:1995-11-20 修回日期:1996-06-04 出版日期:1997-09-30 发布日期:1997-09-30
  • 作者简介:宋林平:助理研究员,四川联合大学工程结构所,成都 610065
  • 基金资助:
    国家自然科学基金;中国长江三峡工程开发总公司联合资助

AN ITERATIVE ALGORITHM fOR DAMPED, WEOGETED SEISMIC TOMOGRAPHY AND ITS APPLICATION TO ENGINEERING

SONG LINPING1, LIU HAOWU1, SHA CHUN2, SONH ZHENGZONG2   

  1. 1. Sichuan Union Univ, Chengdu, 610065;
    2. Dept of Geophy Prosp, CHIDI, Chengdu, 610072
  • Received:1995-11-20 Revised:1996-06-04 Online:1997-09-30 Published:1997-09-30

PDF

68

被引次数

4

摘要： 该文提出了求解阻尼加权最小二乘问题的共轭梯度型成像算法,采用自然权和先验信息约束对有高斯噪声的数据进行了数值试验、并应用于四川雅砻江桐子林水电站坝址测区的地震层析成像,图像质量良好.

关键词: 地震层析成像, 共轭梯度法, 阻尼加权最小二乘解

Abstract: Thls paper presents a new conjugate gradient type algorithm to solve the damped, weighted least-squares problem for seismic tonlography. Combining the natural weight and a priori constralnt, the numerical tests with Gaussian noisy data are performed. The results show that the method is superior to the conventional least squares method. Finally, the method has been applied to Tongzhilin (Sichuan, China) Hydro-electric Power cross-well data, and the reconstructed velocity image agrees well with the geological conclusion.

Key words: Damped and weighted leastsquares solution, Seismic tomography, Conjugate gradient