A GL Metro Carlo EM inversion

In this paper, we propose a Global and Local. (GL) Metro Carlo (GLMC) Electromagnetic (EM) inversion method to recover the EM material parameters. The GLMC inversion is a compromising method between the deterministic and random Monte Carlo simulation methods. The GL modeling strategy simulation process is used to construct the GLMC inversion. Our GL EM modeling method is very fast to calculate data when the EM parameters are changed in each one sub domain successively, and can greatly increase the speed of GLMC inversion. The GLMC EM inversion is fast, stable and has reasonable resolution. The GLMC inversion method can be extended to the seismic, acoustic and their coupled inversion. The GLMC inversion algorithms and software are also developed.