The equations are solved by finite difference method and the mean and variance of pressure head are determined from its random expression.
通过摄动方法得到一系列关于水头展开式的偏微分方程，用有限差分法进行求解，获得了压力水头的随机描述，并计算其均值和方差。
The equations are solved by finite difference method and the mean and variance of pressure head are determined from its random expression.
通过摄动方法得到一系列关于水头展开式的偏微分方程，用有限差分法进行求解，获得了压力水头的随机描述，并计算其均值和方差。
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