The diffusion equation was discretized using a local one-dimensional finite difference equation and solved using the speedup method.
扩散方程采用隐式局部一维格式差分离散，利用追赶法求解；
The text is detailed to study the deducing process of the nodal finite difference equation, and to study its application hi the rock mass engineering problems.
本文详细研究了节点有限差分运动方程的推导过程，以及在岩土工程问题中的应用。
The paper presents an study of copper clad steel wire produced by liquid and solid bonding method. Using the finite difference equation, the dipping process is analyzed.
以液固相反向凝固法生产的包铜钢线为研究对象，利用有限差分法分析了铜在钢线芯体上的浸覆过程；
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