摘要
在研究了二度磁异常体正演公式的基础上,推导出了二维光滑磁化强度成像的基本公式。在构造目标函数时,基于Occam’s反演方法,在目标函数中加入了光滑度项及最小模型项来对模型进行约束,同时为了克服反演结果富集地表附近的现象,通过采用深度加权函数对空间单元赋予不同的权重,得到比较符合实际的结果。反演过程中对物性界限进行约束,控制反演结果的变化范围,改善了反演效果。在求解方程组时,采用了计算速度快、节省内存且收敛快速的共轭梯度算法。对多组理论模型进行光滑磁化强度成像效果进行分析,表明该反演算法不依赖于初始模型设置,成像效果较好。
The paper presents the magnetization imaging inversion formula of 2D magnetic anomaly based on its forward formula. When constructs the objective function, the smoothness term and minimum model term are added to constraint the model based on Occam＇s inversion method. Furthermore, the conjugate gradient method is used in solving multi-dimensional linear equation. By comparing the forward calculation results of theoretical model and its magnetization inversion, the reliability of the inversion algorithm is analyzed, which indicates that the algorithm does not depend on the initial model and gets good result.
出处
《红水河》
2015年第2期46-49,54,共5页
Hongshui River
关键词
磁化强度
成像技术
二维
magnetization intensity
imaging technology
2D
