Optimization back-analysis on pipeline defect identification based on constrained penalty function and nonlinear-least-squares method. - Tongtao Wang; Xiangzhen Yan; Xiujuan Yang; Yaorong Feng (FSKD, 2010)

Improved Gauss-Newton-Marquardt algorithms for displacement back analysis of casing external loads in salt stratum. - Xiangzhen Yan; Tongtao Wang; Xiujuan Yang; Yaorong Feng; Jianjun Wang (ICNC, 2010)