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将总电位ν分解为正常电位．ｕｏ和异常电位ｕ·本文绘出点源二维电场中，异常电位ｕ的傅氏变换Ｕ的变分方程，以及点源二维电场地形影响的异常电位ｕ的傅氏变换Ｕ的积分方程，前者可用有限单元法求解，后者可用边界单元法求解．根据电源点的Ｕ的傅氏反交换，解决了前人尚未解决的直接计算点源二维电场中纵剖面（通过电源点、平行走向的剖面）的电位问题．
The total potential ν decomposition of the normal potential. uo and anomalous potential u · This paper plots the integral equation of the Fourier transform U of the anomalous potential u in the point source two-dimensional electric field and the Fourier transform U of the anomalous potential u influenced by the point source two-dimensional electric field topography, The former can be solved by the finite element method, which can be solved by the boundary element method. According to the inverse Fourier transform of U at the power point, the potential problem of the direct calculation of the vertical section (the section passing through the power point and the parallel direction) in the point-source two-dimensional electric field which has not been solved by the predecessors is solved.