Only clouds of points instead of grids are distributed over the computational domain and the spatial derivatives of the considered partial equations are estimated using a least - square curve fit on local clouds of points 与传统的网格方法不同，无网格方法的核心是用“点云”离散求解区域，并基于当地点云离散结构，引入二次极小曲面逼近空间导数。
