Then we apply the approach of direct particle simulation ( dps ) to the simulation of soft sphere model and hard sphere model by innovatively combining the different method of dealing the particle collision algorithm of hard and soft sphere model . we also calculate the different cases with the two approaches 接着运用颗粒相直接模拟思想，大胆地鞣和了国内外学者关于软颗粒、硬颗粒模型对颗粒碰撞计算的不同方法，分别用软、硬颗粒模型计算了不同的例子。
