DÉCOMPOSITION PAR DUALISATION D'UN PROBLÈME NON LINÉAIRE DE BASSIN SÉDIMENTAIRE

Rencontres Franco-Marocaines en Approximation et Optimisation 2005

Jonas KOKO

Others  :  http://www.esaim-proc.org/articles/proc/pdf/2007/04/proc072014.pdf
PID  :  49725

来源: CEUR

【 摘 要 】

We propose a Lagrange multiplier based decomposition method for a nonlinear sedimen-tary basin problem. Using an additional unkown, the sedimentary basin problem is restated as a linearly constrained minimization problem. The resulting Uzawa algorithm solves, at each iteration, one linear system with a constant (sparse) matrix. Numerical experiments on a model problem show that, for large scale problems, our method is more e±cient than the classical Newton-Raphson method.