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《Chinese Journal of Geophysics》 2005-05
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An optimize method for transient electromagnetic field-wave field conversion

LI Xiu 1,2, XUE Guo-Qiang 3, SONG Jian-Ping 1, GUO Wen-Bo 1, WU Jun-Jie 21 School of Electronic and Information Engineering, Xi'an Jiaotong University,Xi'an 710049,China 2 School of Geology and Survey Engineering, Chang An University, Xi'an 710054,China 3 Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029,China  
During the forward transformation of wave-field, in order to decrease the number of integral coefficients and the sampling number of dispersed digital integral, as while as ensure transient electromagnetic field calculation precision, the two-step optimized method has been proposed. This method can deal well with ill-posed question produced by large amount of integral coefficients and depress the ill-posed problem of the first calculator function. During wave-field inverse transformation, the normalized method are adopted, optimizing normalized parameters are selected by the deviation theory and the Newton iterative form to make the transformed wave field stable and reliable . The comparison between numerical results and known wave-field function values shows that the method put forward in this paper is effective and useful.
【Fund】: 教育部“教育振兴行动计划”项目;; 国家973项目(2002CB412702);; 中国科学院知识创新工程重要方向项目(KZCX3SW134)资助.
【CateGory Index】: P631.4
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