A general formula is derived for a finite-difference method (FDM) with non-uniform grids in a cylindrical coordinate system, and a perfectly matched layer (PML) is used for the boundary treatment.
在均匀格点的基础上，给出了基于柱坐标的全矢量非均匀格点有限差分方法(FDM)，并采用了完美匹配层(PML)边界条件。
An explicit finite-difference method (FDM) was used to model and simulate the solidification of eutectic cast iron by combining heat transfer equations with undercooling nucleation and growth laws.
综合热传导方程与过冷形核、生长规律，用显式有限差分法模拟了共晶铸铁的凝固过程。
Finite Difference Method (FDM) is usually used for calculating the temperature field of casting solidification processes.
有限差分方法是凝固过程温度场解析的常用数值计算方法。
However, the usual FDM (finite difference method) schemes disregard the symplectic conservation for conservative systems.
但通常的差分格式并不考虑保辛的性质，即使对保守体系。
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。
The finite difference method (FDM) is used in the numerical calculation. Fielddistribution at particular time and field at one point as a function of time are displayed.
数值计算采用了有限差分法，可算出某时刻厚板边缘散射场的分布和某点声场随时间的变化。
The finite difference method (FDM) is used in the numerical calculation. Fielddistribution at particular time and field at one point as a function of time are displayed.
数值计算采用了有限差分法，可算出某时刻厚板边缘散射场的分布和某点声场随时间的变化。
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