并根据计算结果选出最优的材料梯度方程。

Thus the best material gradient equation is selected.

youdao

我的意思是，上一次我们讨论过了，这个梯度是垂直于等高线，并且是指向方程增长的方向的。

I mean we'd seen in last time, but the gradient is perpendicular to the level and points towards higher values of a function.

youdao

选择共轭梯度法解决由有限元法形成的大型稀疏矩阵方程，应用FORTRAN语言编制了数值模拟系统软件。

Conjugate gradient method were choosed to solve the large sparse matrix equations induced by the FEM and computer language FORTRAN was used to programme the numerical simulation system software.

youdao