series

Using grade coefficient method, this paper studies the safety level of road, and provides a simple and convenient way for scientific measure road safety grade.

运用等级系数法系统研究道路交通安全状态 ,并进行实例分析与论证 ,为道路交通安全等级的科学测定提供了一种简便实用的方法 ,也为道路安全管理现代化提供科学依

In order to get higher accurate phase of the double spacial frequency fringes, a method that employs the orders of projected fringes as axises to establish fringe-order-coordinate is presented.

为了进一步提高双频投影条纹的相位精度,提出以双频投影条纹的条纹级数为坐标建立级数坐标系的分析方法,使得条纹级数(或相位)及其误差的描述变得非常直观。