一种大地电磁成像技术

A MT IMAGING TECHNIQUE

文中将层析成像技术中广泛采用的广义脉冲谱技术应用了解大地电磁 维反演成像问题,实现了电阻率剖面成像.由于在做有限元二维止演的同时,就完成了Frechet导函数的计算,从而提高了反演的速度。文中给出了模型、实例的计算,均取得了较好的效果.

An effect of resistivity profile imaging was obtained through successfully applying the generalized pulse spectrum technique, which has been widely used in the tomographic technique, to the imaging problem of MT 2-D inversion. The inversion was speeded up because the Frechet derivatives were calculated at the same time when computing the 2-D forward probiem using finite element method. The theory of this imaging method is rigorous and it is numerically stable and fast in convergence. The method is easy to be adopted on microcomputer 386. Examples using synthetic data of various models and real data showed good imaging results in this paper.