This paper describes the beijing electron position collider ( bepc ) and the beijing spectrometer ( bes ) , describes the structure , capability and basis method of muon detector . the bes2 muon counter performance has been careful studied 本文对概述了bepc和bes的性能结构，讲解了子计数器的结构、功能和z坐标定位的工作原理。
This is confirmed to be effective by experiments . when problem of locating depth of defects is well settled , we establish the three - dimensional model of defect to calculate the three - dimensional coordinate of defect 在较好的解决了缺陷深度定位问题的基础上，本课题进一步建立了缺陷定位的三维数学模型，用来解决缺陷的三维坐标定位问题。
The characteristic of all of world coordinate system is , coordinate of every time fixed position and locate coordinate does not have a relation last time , the coordinate location system that touching screen is an independence on physics , the data that feels every time passes the coordinate that calibration turns to go up for screen , such , no matter be below what circumstance , with respect to requirement feeling screen this covers coordinate , bit samer output data is stable , if be not stabilized , so this feeling screen locates with respect to unwarrantable absolutely coordinate 绝对坐标系统的特点是，每一次定位坐标与上一次定位坐标没有关系，触摸屏在物理上是一套独立的坐标定位系统，每次触摸的数据通过校准转为屏幕上的坐标，这样，就要求触摸屏这套坐标不管在什么情况下，同一点的输出数据是稳定的，假如不稳定，那么这触摸屏就不能保证绝对坐标定位。
The high precision of the machining center manufacture lies on the multi - factor , one of the main factors is the movement precision of the machine tool oneself , i . e . the movement precision and the orientation precision of the coordinate of the machining center directly affect the machining precision of the workpiece 加工中心加工的高精度取决于多种因素，其中主要因素之一是机床自身的运动精度。也就是说，加工中心各坐标运动的运动精度和坐标定位精度直接影响工件的加工精度。
