瞬变电磁法非线性优化反演算法对比  

Comparison of Nonlinear Optimization Inversion Algorithms of Transient Electromagnetic Method

作　　者：徐正玉 付能翼 周洁 付志红[1] Xu Zhengyu;Fu Nengyi;Zhou Jie;Fu Zhihong(School of Electrical Engineering,Chongqing University,Chongqing 400044,China;Department of Geophysics,Colorado School of Mines,Colorado80401,USA;Chongqing Triloop Prospecting Technology Co.,Ltd,Chongqing 402660,China)

机构地区：[1]重庆大学电气工程学院,重庆400044 [2]科罗拉多矿业学院地球物理系,美国科罗拉多804013 [3]重庆璀陆探测技术有限公司,重庆402660

出　　处：《吉林大学学报（地球科学版）》2022年第3期744-753,共10页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(517770117)。

摘　　要：瞬变电磁法(TEM)属于时间域电磁探测方法,被广泛应用于矿产资源勘探、煤矿突水突泥调查以及岩溶调查等领域.传统的瞬变电磁数据处理方法采用“烟圈”快速成像或者线性迭代方法,存在精度低、易陷入局部极小值以及灵敏度矩阵计算量大等不足.本文提出将非线性优化算法应用到瞬变电磁数据反演中,采用粒子群优化(PSO)算法和萤火虫算法进行对比分析,建立典型的三层和四层地电模型,分析两种算法的收敛特性和抗噪特性.研究结果表明:虽然PSO算法具有较高的计算效率,但数据处理精度低,抗噪能力差;而萤火虫算法在抗噪性、数据处理精度等方面均优于PSO算法.最后,采用两种算法对实测数据进行处理,反演结果验证了上述结论.Transient electromagnetic method(TEM)is a type of time-domain electromagnetic detection method,which is widely used in mineral resource exploration,coal mine,water and mud inrush investigation,karst investigation,and other issues.In conventional TEM data inversion,smoke-ring fast imaging and linear iterative inversion methods are used,which have the disadvantages of low accuracy,easy to fall into local minimum,and large calculation amount of sensitivity matrix.In this paper,a nonlinear optimization algorithm is proposed for transient electromagnetic data inversion,and the particle swarm optimization(PSO)algorithm and firefly algorithm are used for comparative analysis.Typical three-layer and four-layer geoelectric models are established,and the convergence and anti-noise characteristics of the two methods are analyzed.The research results show that the PSO algorithm has high computational efficiency,however the data processing accuracy is low and the anti-noise ability is poor.The firefly algorithm has great advantages over the PSO algorithm in terms of noise resistance and data processing accuracy.We processed the measured data by using the two methods and compared the results,the above conclusions are verified.

关 键 词：瞬变电磁法 非线性优化算法 粒子群优化算法 萤火虫算法 反演 

分 类 号：P631.3[天文地球—地质矿产勘探]