%0 Journal Article
%T Non-linear inversion with the quadratic function approaching method for magnetotelluric data.<br>大地电磁测深资料的二次函数逼近非线性反演
%A YAN Liang-Jun HU Wen-Bao Key Laboratory of Exploration Technologies for Oil
%A Gas Resources
%A MOE
%A Yangzi University
%A Jingzhou
%A China
%A <br>严良俊
%A 胡文宝
%J 地球物理学报
%D 2004
%I 
%X We present a new technique for inverting magnetotelluric sounding (MT) data by introducing the quadratic function approaching scheme, which is originally used in non-linear optimization. The quadratic function approaching method (QFAM) takes the advantage of that quadratic function has single extreme value. It avoids leading to an inversion solution for local minimum and ensures the solution for global minimization of objective function. The method does not need calculation of the sensitivity matrix and not require a strict initial earth model. In this study, the coefficients of the quadratic function used for the inversion are calculated dexterously by using affine transformation and by adopting an effective method for selecting control points. Examples for synthetic data and field measurement data indicate that the proposed inversion method is effective.
%K Quadratic function
%K Magnetotelluric sounding
%K Non-linear inversion
%K Apparent resistivity
%K Affine transformation<br>大地电磁测深
%K 二次函数逼近
%K 非线性反演
%K 视电阻率
%K 仿射变换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=049904131AEF8400&yid=D0E58B75BFD8E51C&vid=F4B561950EE1D31A&iid=94C357A881DFC066&sid=073C3CF5F13F64FE&eid=2BCD2FED7562E194&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=10&reference_num=10