Netgen Mesh Generation

NGSolve ,使用NetGen进行有限元前处理，然后调用预条件共轭梯度法求解，也可以使用SuperLU求解。-NGSolve, using the finite element pre NetGen, and then call the preconditioned conjugate gradient method can also be solved with SuperLU.

3维Laplace方程的有限元求解，利用P1协调元求解，三维网格剖分采用的软件为NetGen-Finite element solution of the three-dimensional Laplace equation, P1 coordinating element for solving the three-dimensional mesh generation software for NetGen