极大熵条件下的动态搜索优化图象重建方法

提出一种满足多种准则的动态搜索优化图象重建方法。从图象场的本质出发，设立了３个准则函数。熵函数的导数是非线性的，本文将其变换为近似的线性公式以获得迭代公路。动态搜索则尽可能避免很多算法在迭代过程中对图象校正过量或不足的问题。

A Developed Algorithm to the Automatic Mixed Mode Mesh Generation

In this paper, a simple but effecient algorithm for automatic mesh generation over arbitrary polygonal domains is proposed. The algorithm can generate three different mesh topologies: an all triangular element mesh, a mixed mode element mesh(which consist of both quadrilateral and triangular elements) and an all quadrilateral element mesh. If an all triangular element mesh is the result mesh needed, the method the method can work just as other general triangulation method. If a mixed mode or all quadrilateral element mesh should be generated, the method can generate rectangles or squres as more as possible.