大地电磁三维正、反演多核并行计算的设计与实现

The multi-core paralleled strategies and efficiency analysis of 3D magnetotelluric forward modeling and inversion

首先以频点为并行粒度,完成了MT三维正演并行计算,然后将该算法引入共轭梯度法MT三维反演过程中的正演求数据的残差、反演方程右端项的求取、共轭梯度求解模型增量这三个计算环节中,使得MT三维反演中的主要计算量实现并行化。对编制的MT三维正、反演并行计算程序,在多核工作站上通过理论地电模型进行了正演试算和反演验证,并在串行和并行两种计算方式下进行了计算效率对比。

A parallel magnetotelluric （ MT） 3D forward modeling algorithm was implemented on multi-core CPU, and was introduced into the 3D conjugate gradient （ CG） inversion algorithm with MT data for parallel computation. The authors tested the parallel MT 3D forward modeling code with a theoretical model and the parallel 3D inversion code with one synthetic data. A comparison of the execu-tion efficiency was made between serial computation and parallel computation. The results indicate that the parallel 3D forward modeling and inversion computation are correct, and the efficiency of computation is greatly improved.