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。

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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。

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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.

分析像散椭圆高斯光束的传输变换特性，推导出半导体激光束的像散校正与旋转对称化变换公式。

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