To process data of resistivity sounding by numeric difference method will separate all anomalies and it will be beneficial to interpretation and inference.
通过对电阻率测深数据作数值差分处理，使区域场受到压制而局部场得到突出，并且多个相互叠加的异常也得到分离，有利于解释推断。
FDM (Finite Difference method) is one of the important numeric calculation methods used in Groundwater Gynamics.
有限差分法是一种重要的数值计算方法。
To friable rock mass in the goaf, numeric model using the 3-D finite difference method is established to analyze it.
针对采空区内的松散岩体，运用三维有限差分法建立了数值模型对其进行分析；
To friable rock mass in the goaf, numeric model using the 3-D finite difference method is established to analyze it.
针对采空区内的松散岩体，运用三维有限差分法建立了数值模型对其进行分析；
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