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1·Space debris delta-velocity probability density function was deduced by NASA's standard breakup model, and time integral algorithm of collision probability between spacecraft and any debris was built.

推导了基于NASA标准解体模型的碎片分离速度概率密度函数，建立了计算航天器与单颗碎片碰撞概率的时间积分算法。

2·A example about their applications to integral calculations in electron-ion collision is given.

并举例说明这些特征在电子-离子碰撞的积分计算中的应用。

3·The obtained integral cross section decreased quickly at low collision energy and then became flat, which reflected the general feature of such exothermic reactions.

计算得到的反应截面在碰撞能量很低时下降很快，然后变得比较平坦，其变化趋势与实验测量的结果相吻合，呈现出强放热反应的基本特征。