大地电磁概率成像的效果评价  

Appraisement on the MT probability tomography

作　　者：毛立峰[1] 王绪本[1] 高永才[1] 

机构地区：[1]成都理工大学信息工程学院,成都610059

出　　处：《地球物理学报》2005年第2期429-433,共5页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目 (4 0 0 740 3 6)资助

摘　　要：从数学和物理角度对大地电磁概率成像方法进行详细的分析.理论分析结果表明,扫描函数在概率成像中起着关键的作用;影响概率成像效果的三个因素是扫描函数的定义是否合理、提取异常的方法是否合理以及概率成像的强多解性;对一些间隔较远、埋深较浅的简单模型,概率成像的效果也较好,而对复杂模型,受上述因素的影响,其概率成像效果有待改善.最后用理论模型对上述结论进行了验证.The effect of the MT probability tomography is analyzed profoundly in the view of mathematical and physical mechanism. Theoretical analysis demonstrates that the scanner function takes a key role of the tomography. Whether the scanner function is reasonably defined or not is the major factor to influence the effect of the tomography; the second factor is whether the method of extracting the abnormal field is proper or not; the third factor is the strong influence of multi-solution. For some simple isolated models with a large granularity and a shallow burying depth, a good effect of the probability tomography will be got correspondingly. For the complicated models, however, influenced by the above factors, the effect of the tomography should be improved. The reliability of the conclusion is tested on the synthetic examples in this paper.

关 键 词：大地电磁 概率成像 扫描函数 

分 类 号：P631[天文地球—地质矿产勘探]