implicit difference approximation的用法和樣例：
例句
- In a Cartesian coordinate system, we carry out a finite difference analysis of a general form of the energy equation.
在直角坐標系中，對能量本征方程的一般形式進(jìn)行有限差分解析，并建立相應的差分格式。 - Based on this method, a difference scheme is derived for the numerical solution of diffusion equation on the structured quadrilateral mesh.
在此基礎上推導了在結構四邊形網(wǎng)格上求解擴散方程的線(xiàn)性精確差分格式。
