sampling mesh

3, Presenting an algorithm of mesh sampling and geometrical optimization based on Laplace smooth arithmetic operators.

3，提出了一种基于Laplace光顺算子的网格采样几何优化算法。

The mesh re-sampling algorithm is simple and effective, which enables the watermark detection from simplified meshes or meshes with topology modification.

所使用的网格重采样算法简单高效，使简化网格和拓扑结构已改变的网格的水印检测成为可能。

In the high mountain area under arid climate, stream sediment geochemical survey at the 1/ 50000 scale was carried out with the sampling density of 4 points per square kilometer. The grain size of the sample in initial preparation stage was-20~+ 120 mesh.

在干旱高山景观区，以4点/km2的采样密度，选择-20~+120目粒级段为初加工粒级，开展1∶5万水系沉积物地球化学测量。