relational expression

基本解释

According to the relational expression, the basic size of cam mechanism can be defined.
由关系式计算最佳凸轮机构的基本尺寸。
Note: The query optimizer considers using a functional index when the index expression is used in a relational expression or as an argument to one of the operator class functions.
注意：当索引表达式被用于关系表达式，或作为某个操作符类函数的参数时，查询优化器将考虑使用函数索引。
Using of the geometric relationship of hang system, it derived a relational expression between the horizontal displacement at juncture piers top and the variations of arch rib elevation.
通过对大跨度钢管混凝土拱桥拱肋分段扣挂悬拼施工的介绍，利用吊装扣挂体系的几何关系，推导出交界墩墩顶水平位移与拱肋标高改变值之间的关系表达式。