线接触滑块润滑，基于有限差分法，采用的是中间差分的方法，求解油膜厚度-Line contact slider lubrication, based on the finite difference method, using an intermediate difference method for solving film thickness

有限单元法求解二阶偏微分方程，使用的方法是加权余量法，比一阶方程更加可靠-Finite element method for second order partial differential equations, a method using a weighted residual method is more reliable than the first-order equation