走时层析成像正反演方法研究

英文篇名：The research on travel-time tomography based on forward calculation and inversion
中文刊名：西安邮电学院学报
英文刊名：Journal of Xi'an University of Post and Telecommunications
作者：毛伟伟 ; 于素萍
英文作者：MAO Wei-wei1 ; YU Su-ping2(1.Department of Foreign Languages ; Luoyang Institute of Science and Technology ; Luoyang 471000 ; China ; 2.Department of Computer and Information Engineering ; Luoyang Institute of Science and Technology ; Luoyang 471000 ; China)
中文关键词：走时层析成像 ; 正演 ; 反演 ; 最短路径 ; 射线追踪 ; SIRT算法
英文关键词：travel-time tomography ; forward calculation ; inversion ; shortest path ; ray tracing ; SIRT algorithm
出版日期：2010-01-10
机构：洛阳理工学院外语系;洛阳理工学院计算机与信息工程系;
年：2010
期：01
出版单位：西安邮电学院学报

摘要

在资源勘探及工程质量检测等领域的走时层析成像技术具有分辨率高、探测范围广、成像结果直观等特点。走时层析成像技术主要包括两部分研究内容:估计射线路径及走时,进行图象重建。本文基于射线理论,应用最短路径射线追踪方法进行了射线走时的正演计算;并通过对多种反演算法的对比研究,选用SIRT算法进行快速反演成像,最后给出了仿真计算结果,并进行了分析比较,证明了本文正反演算法的有效性和实用性。
The technology of travel-time tomography,widely used in the fields such as resource exploration and quality testing of construction,is characterized by high resolution,wide detection range and visual imaging.The technology includes two parts—the estimation of ray tracing and travel time;the rebuilding of images.This paper,based on ray theory,provides forward calculation by using the shortest path ray tracing;it also presents fast inversion imaging based on SIRT by comparing different inversions;finally,it provides the stimulation results and the comparison,as well as the analysis of the results to prove the validity and practicability of the forward calculation and inversion.

引文

[1]刘国华,王振宇,孙坚.弹性波层析成像及其在土木工程中的应用[J].土木工程学报,2003,36(5):76-81.
    [2]和锐,杨建思,张翼.地震层析成像方法综述[J].CT理论与应用研究,2007,16(1):35-48.
    [3]Adam Rhett Isaacaon,A 500kHz-5MHz CW SteppedFrequency Borehole Tomographic Imaging system[C].Cape Town,December,2002.
    [4]Bernard Giroux,Erwan Gloaguen,Michel Chouteau,bh-tomo-a Matlab borehole georadar 2D tomography pack-age[J].Computers and Geosciences,2007,33(1):126-137.2005.
    [6]李志辉,刘争平.最短路径法射线追踪的matlab实现[J].工程地质计算机应用,2004,(4):16-19.
    [7]Humphreys E,Clayton R.Adaptation of back projectiontomography to seismic travel time problems[J].Journalof Geophysical Research,1988,(93):1073-85.
    [8]刘盛东,李承华.地震走时层析成像算法与比较[J].中国矿业大学学报,2000,29(2):211-214.