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通过只计算三维DC电阻率问题中体积方程正演解的对角项,我们已经得到了一个快速正演的解,该解在低至适中电阻率对比范围中是准确的。对于在二维或三维反演算法中,这种解的精度和速度使得该解是很有用的。低对比近似尤其适用于极小结构反演的光滑特征。因为完整的正演解在计算上是很费时
By computing only the diagonal terms of the forward solution of the volumetric equation in the three-dimensional DC resistivity problem, we have obtained a fast forward solution that is accurate in the low to moderate resistivity contrast range. For the two-dimensional or three-dimensional inversion algorithm, the accuracy and speed of this solution makes the solution very useful. The low contrast approximation is especially suitable for smooth features of very small structural inversion. Because the complete forward solution is computationally time-consuming