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1·The restitution coefficient was applied to describe the impact problem.

引入弹性恢复系数法描述砂粒间碰撞问题。

2·The meaning and function of restitution coefficient were introduced, and some kinds of impact process models were analyzed.

论述了恢复系数的含义及作用，并在此基础上介绍了几种碰撞过程模型。

3·A formula of rebound distance based on coefficient of restitution was deduced through kinematic analysis of raw coal (mixed gangue) in the process of oblique-impact.

通过对斜碰撞过程中原煤(混矸)球的运动分析，推导出基于碰撞恢复系数的物料块反弹距离公式。

4·The energy conversion and loss in collision are discussed, a formula of coefficient of restitution is obtained by energy.

讨论碰撞过程中能量转化和能量损失，给出恢复系数的能量表达式。

5·A thinking orientation on the completely inelastic collision is broken out. Two kinds of the coefficient of pseudo-restitution are drawn.

突破了关于完全非弹性碰撞的一种思维定势，引入了两种赝恢复系数。