利用积分方程和阻尼最小二乘法，对任意形状源多个位置激发下三维异常体的电磁场进行了反演计算。计算中将任意形状源条件下多组激发点和接收点的电磁场数据统一考虑，求出了此种条件下的雅克比矩阵，反演得到了地下异常体的电阻率分布。模型试算结果表明，反演收敛速度快，对初值依赖性小，结果准确可靠。%3D abnormal body's electromagnetic field with arbitrary shape source multiple locations excitation can be inverted u-sing integral equation and damped least squares.Multiple groups of electromagnetic field data in different excitation and receiv-ing point to be uniform consideration in inversion,a matrix is obtained,distribution of resistivity of underground abnormal body is achieved.Model test shows that inversion of fast convergence speed,less dependent on the initial value,the result is accurate and reliable.
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