| 层析成像新算法及其在工程检测上的应用 |
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| 引用本文： | 杨文采, 杜剑渊. 层析成像新算法及其在工程检测上的应用[J]. 地球物理学报, 1994, 37(02): 239-244, |
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| 作者姓名： | 杨文采 杜剑渊 |
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| 作者单位： | 1. 地质矿产部地球物理地球化学勘查研究所, 廊坊 102849; 2. 地质矿产部北京计算中心, 北京 100083 |
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| 摘 要： | 基于走时和振幅的层析成像反演涉及大型稀疏矩阵方程的求解，当矩阵严重病态时，目前流行的正交分解型迭代算法难以取得良好的成像效果．本文介绍一种改进的ＬＳｑＲ算法，即带阻尼的ＬＳｑＲ迭代算法，它应用在北京机场高速公路桥墩施工质量检测中，取得了良好的效果．
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| 关 键 词： | 应用地球物理 层析成像 阻尼LSQR算法 工程质量检测 |
| 收稿时间： | 1993-04-10 |
| 修稿时间： | 1993-08-09 |
A NEW ALGORITHM OF SEISMIC TOMOGRAPHY WITH APPLICATION TO ENGINEERING DETECTIONS |
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| YANG WEN-CAI, DU JIAN-YUAN. A NEW ALGORITHM OF SEISMIC TOMOGRAPHY WITH APPLICATION TO ENGINEERING DETECTIONS[J]. Chinese Journal of Geophysics (in Chinese), 1994, 37(02): 239-244, |
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| Authors: | YANG WEN-CAI DU JIAN-YUAN |
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| Affiliation: | 1. Institute of Geophysical & Geochemical Explorations, Langfang 102849; 2. Beijing Computer Center of MGMR, Beijing 100083 |
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| Abstract: | Sparse matrix equations are usuallp involved for solutions of tomographic problems when traveltime or amplitude data are used.Orthogonal decomposition algorithms are currently used and have difficulties if the matrixes are badly ill-conditioned. This paper shows an improved algorithm of LSqR with damping iterations. Good results are demonstrated by real examples of detecting quality of bridge beds along the high way to Beijing airport. |
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| Keywords: | Applied geophysics Tomography Damping LSQR Engineering detertions |
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