本文将集中讨论局部收敛性，特别是证明了在使用DFP或PSB等矩阵校正公式时，修正后的方法在一定的条件下是超线性收敛的。
Particularly, it is proved that if DFP or PSB matrix updating formulae are used, then our method will be convergent superlinearly under some conditions.
在不同的时间下，不同尺寸的颗粒会撞击壁面不同的位置，但主要集中在壳体与喷管的相接部分和喷管的收敛段。
At different time, particles with different sizes can hit different locations on the wall, which are mainly at the connective part of shell and nozzle and out the convergent section of nozzle.
与传统的计算方法相比，该算法不仅具有收敛速度快，而且计算精度可控以及初始点随机给定集中优点。
Comparing with conventional arithmetic, the arithmetic in this paper has the excellence including fast convergence speed, alterable precision, and random initial value.
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