SOURCE TERM IDENTIFICATION WITH DISCONTINUOUS DUAL RECIPROCITY APPROXIMATION AND QUASI-NEWTON METHOD FROM BOUNDARY OBSERVATIONS

• 作者: El Madkouri Abdessamad Ellabib Abdellatif
• 来源期刊: 计算数学（英文版）
• 年，卷（期）: 2021,（3）
• 页码范围: 311-332
• 页数: 22页
• 语种: 英文
• DOI: 10.4208/jcm.1912-m2019-0121

摘要

This paper deals with discontinuous dual reciprocity boundary element method for solving an inverse source problem.The aim of this work is to determine the source term in elliptic equations for nonhomogenous anisotropic media,where some additional boundary measurements are required.An equivalent formulation to the primary inverse problem is established based on the minimization of a functional cost,where a regularization term is employed to eliminate the oscillations of the noisy data.Moreover,an efficient algorithm is presented and tested for some numerical examples.