probability paper

In order to study the influence of diameter distribution of abrasive particles on the wear of materials in three-body abrasion,through experiment combined normal distribution coordinate analysis,the distribution of abrasive diameter was precisely measured.

为探讨三体磨料磨损中磨料颗粒粒径的分布对材料磨损性能的影响, 通过试验结合正态概率分布坐标分析的方法, 比较准确地得到磨料粒径的分布情况。

This paper describes the calculating model and its solution for two dimensions positioning when user receivers only receives the signal from three satellites for navigation It detailedly describes the calculating method of user receiver outline coordinate in solution and how to calculate user receiver position and its time system difference by calculated outline coordinate.

给出了用户接收机只收到三颗导航卫星信号时的二维定位解算模型及其解算方法 ,重点介绍了解算方法中接收机概略坐标的求法及利用得到的概略坐标求解接收机位置和钟差 ,并做了仿真解算。