The full transformation method is used in element-free Galerkin method for solving the elliptic boundary value problems.
采用完全变换法施加本质边界条件，给出求解椭圆型边值问题的无网格伽辽金方法。
2
Since FEM has no such requirement that the grid line are of orthogonality, a sequence of shearing and stretching transformation, both prior to and subsequent to the elliptic mapping is used.
因有限元法对网格无正交性要求，因而可在椭圆变换前后进行剪切和延伸变换。
3
In view of the above, the transformation properties of astigmatic elliptic Gaussian beams are analysed overall, the exact formulas of correcting astigmatism and rotary symmetrize transformation.