遗传算法与鲍尔方向法相结合的频谱参数混合反演方法  

A hybrid inversion method of spectral parameters combinedwith genetic algorithm and Powell direction method

作　　者：李昶萱 刘海飞 柳建新[1,2] 郭鹏 张一凡[1,2] 刘昕 LI Changxuan;LIU Haifei;LIU Jianxin;GUO Peng;ZHANG Yifan;LIU Xin(Hunan Key Laboratory of Nonferrous Resources and Geological Hazards Exploration,Changsha 410083,China;School of Geosciences and Info-Physics,Central South University,Changsha 410083,China)

机构地区：[1]有色资源与地质灾害探查湖南省重点实验室,长沙410083 [2]中南大学地球科学与信息物理学院,长沙410083

出　　处：《物探化探计算技术》2023年第3期360-367,共8页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(42130810,41774149);湖南省自然科学基金项目(2020JJ4694)。

摘　　要：为准确获取地下极化体或岩矿石标本的频谱参数信息,结合遗传算法与鲍尔方向法实现了频谱参数的混合反演。该方法首先通过遗传算法搜索Cole-Cole模型参数的近似极优解,而后将其作为鲍尔方向法局部寻优的初始解,再经过多次迭代可准确获取频谱参数。遗传算法与鲍尔方向法的有机结合,既能改善遗传算法局部搜索能力差的不足,又能压制鲍尔方向方法易陷入局部极值的缺陷。数值实验表明,两者结合的频谱参数混合反演方法,具有收敛速度快,反演结果准确的特点。In order to accurately obtain the true spectrum parameter information of an underground polarized body,this paper proposes a hybrid inversion algorithm of spectral parameters combining the genetic algorithm and the good direction method.Firstly,the approximate optimal solution of the parameters of the Cole-Cole model is searched by the Genetic algorithm,and then it is used as the initial solution of the local optimization of the Powell direction method,and the spectral parameters can be accurately obtained after several iterations.The organic combination of the genetic algorithm and the Powell direction method can not only improve the poor local search ability of the genetic algorithm but also suppress the defect that the Powell direction method is easy to fall into the local extreme value.Numerical experiments show that the spectral parameter hybrid inversion method combining the two has the characteristics of fast convergence and accurate inversion results.

关 键 词：频谱激电法 COLE-COLE模型 鲍尔方向法 遗传算法 混合反演 

分 类 号：P631[天文地球—地质矿产勘探]