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基于偶极—偶极电极装置的瞬变响应表达式，建立了双极源电场的等效偶极和三次插值的快速近似算法。通过在一些典型地电断面上对算法的试算，表明三次插值法是一种较稳定的快速算法，从而实现了时间谱电阻率法一维正演的快速计算。
Based on the transient response expression of the dipole-dipole electrode device, a fast approximation algorithm of equivalent dipole and cubic interpolation for bipolar source electric field is established. Through the trial calculation of the algorithm on some typical electric sections, the cubic interpolation method is a relatively stable and fast algorithm, so that the fast calculation of the time-domain resistivity method for one-dimensional forward modeling can be realized.