此法在洞室附近使用块体元模型，以反映节理岩体变形的不连续性，而在远处使用连续的有限元模型，以减少计算工作量。
The block element are used to model the rock masses near the cave so that the discontinuous deformation of jointed rock is dealt with easily and the computational effort is reduced accordingly.
传统的有限差分或局部拟合方法未考虑到表面上可能出现的不连续性，因而会不可避免地出现错误。
Without consideration of discontinuities possible existing in range image, traditional finite difference or local surface fitting method, inevitably produce errors.
采用时域有限差分法对T形结、十字结进行模拟分析，提取平面传输线不连续性结构的特征参数——主模散射参数、色散特性等。
Different characteristic parameters of planar transmission line discontinuities are extracted by FDTD arithmetic, such as scattering parameters of dominant mode and dispersion parameters.
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