A 3-D FINITE-ELEMENT RESISTIVITY FORWARD MODELING USING CONJUGATE GRADIENT ALGORITHM
利用共轭梯度算法的电阻率三维有限元正演

In this study, symmetric successive overrelaxation preconditioned conjugate gradient (SSOR-PCG) algorithm is used to solve large linear system derived from 3-D finite-element resistivity forward modeling. Using row-indexed sparse storage mode to store coefficient matrix, the algorithm converges much quickly and requires much less storage of computer. It is very convenient to be applied to the solution of the secondary potential, achieving much higher accuracy while the calculation is keeping fast.