This research is about Precipitation simulation based on particle system, research point is the simulation of the chemical reaction which product sediment in liquid solution.
本次研究是采用粒子系统对沉淀现象进行模拟，研究重点是对液体中产生化学反应生成沉淀现象的模拟。
2
The polar ionosphere is strongly influenced by convection electric fields, auroral particleprecipitation, and field-aligned electric currents etc.
极区电离层强烈地受到极区对流电场、极光粒子沉降和场向电流等的影响。
3
The evaluation method on stability of the particleprecipitation scale is finally described.