jgg     2010 30 (6):  51-56    ISSN: 0412-1961  CN: 21-1139/TG REGULARIZATION HOMOTOPY METHOD FORSOLVING ILL-POSED NONLINEAR LEAST SQUARE PROBLEM AND ITS APPLICATION Tang Limin 1,2) ; and Zhu Jianjun 1) 1)School of Info-Physics and Geomatics Engineering of Central South University, Changsha 4100832)School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410004 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null