【摘要】 本文通过概率成像法、α中心法、遗传算法的有机结合,实现了2-D 电阻率层析成像非线性反演.首先,根据概率成像结果指示出的2-D 地质异常体的相对电性和大致分布范围,合理地确定出α中心的位置与强度系数的变化范围.其次,以α中心法作为2-D地电结构的正演手段,采用遗传算法反演出各α中心的强度系数.在此基础上,应用α中心法重新构建出地下介质电阻率的分布.通过对均匀半空间中赋存2-D 地质异常体模型的反演试验,获得了令人满意的结果.更多还原

【Abstract】 The paper develops a 2-D nonlinear inversion approach for electrical resistivity tomography survey by using probability tomography,a centers,and genetic algorithm.First,the distribution scopes of anomalous bodies and the positions as well as coefficient ranges of a centers are determined based on the results of multiple superimposed probability tomography.Secondly, we use a centers method to numerical simulation of 2-D electrical structures and the intensity coefficients of a centers are obtained by the genetic inversion algorithm.Last,the resistivity distribution is reconstructed by using a center method.To test the effectiveness of the approach, several models of 2-D anomalous bodies imbedded in half homogeneous space are used to implement inversion and the results are satisfactory.更多还原