大地电磁法三维共轭梯度反演研究(英文)

被引:15
作者
林昌洪
谭捍东
佟拓
机构
[1] 中国地质大学(北京)地球物理与信息技术学院
关键词
大地电磁; 三维; 反演; 共轭梯度;
D O I
暂无
中图分类号
P631.325 [];
学科分类号
摘要
在对共轭梯度算法深入分析的基础上,我们实现了大地电磁阻抗资料三维共轭梯度反演算法。三维共轭梯度反演算法的特点是反演过程中不需要实际计算和存储雅可比矩阵,只需要计算雅可比矩阵的转置与一个向量的乘积以及雅可比矩阵与另一个向量的乘积,直接可以得到模型修正量。三维共轭梯度反演算法每进行一次模型参数更新迭代只需要1次正演和4次"拟正演",有效的减少了反演的计算量。通过对理论模型合成数据进行反演试算,验证了所实现的大地电磁三维共轭梯度反演算法的有效性和稳定性。
引用
收藏
页码:314 / 321+351 +351-352
页数:10
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