大地电磁双二次插值FEM正演及最小二乘正则化联合反演
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Release time:2020-08-08 DOI number:10.19476/j.ysxb.1004.0609.2013.09.023 Affiliation of Author(s):中南大学地球科学与信息物理学院 Teaching and Research Group:中南大学应用地球物理系 Journal:中国有色金属学报 Place of Publication:中国 Funded by:41074085；NCET-120551；中南大学升华育英人才计划资助项目；湖南省普通高校青年骨干教师资助项目 Key Words:大地电磁；有限单元法；正演模拟；最小二乘正则化；联合反演 Abstract:从大地电磁(MT)二维正演所满足的偏微分方程边值问题出发,应用矩形网格剖分和单元内双二次插值推导有限单元法求解大地电磁TE与TM两种极化模式正问题详细算法.应用反演理论将病态问题求解的正则化方法应用到最小二乘优化方法中,获得最光滑约束最小二乘正则化反演目标函数,并利用Matlab编制了大地电磁二维正反演计算程序.应用该程序对高低阻地电模型和Sasaki模型开展了正反演计算,并绘制TE模式和TM模式,TE&TM联合反演模式的反演成果剖面图.将所得的反演剖面与初始模型对比可知,TE模式反演剖面纵向分辨率较高,TM模式横向分辨率较高,TE&TM联合反演优于单一极化模式的反演,并证明双二次插值有限元法MT正演及最小二乘正则化反演算法的有效性与可行性. Co-author:王珣 First Author:冯德山 Indexed by:Applied Research Document Code:1004-0609(2013)09-2524-08 Discipline:地质资源与地质工程 Document Type:J Volume:23 Issue:9 Page Number:2524-2531 ISSN No.:1004-0609 Translation or Not:no CN No.:43-1238/TG Date of Publication:2013-09-15 Included Journals:EI -
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