relational expression
关系式
常用释义
英式发音
美式发音
基本释义
- 关系表达式：在计算机编程中，用于比较两个值之间关系的表达式。通常使用比较运算符（如等于、大于、小于等）来判断两个值之间的关系。
例句
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1·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。
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2·Then the relational expression of the total cost of production and the effective number is found.然后求出总生产费用与效数的关系式。
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3·The relational expression of natural convective heat transfer of isothermal vertical strip was found.以条宽为特征量，得出了竖窄条自然对流换热关系式。
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4·A simple relational expression can be obtained by calculating results, and can predict breakthrough time.通过计算结果可以得到简单的关系式，能够预测突破时间。
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5·The results show that two IPR calculation methods are consistent when using given shear-rate relational expression.计算结果表明，在给定的剪切速率关系式下，两种方法计算的流入动态关系一致。
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6·And by means of least square method, the relational expression for the two kinds of functions to transform each other is derived.并通过最小二乘法的数学手段，导出了两种函数相互转换的关系式。
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7·Taking system water undercooling as growth - driving force of methane hydrate, relational expression between methane hydrate growth ratio and undercooling is fitted.系统水过冷度作为甲烷水合物生长驱动力，拟合出甲烷水合物生长速率与过冷度的关系式。
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8·The relational expression of materials properties and heat treatment parameters is found by regression analysis, and the optimum technological combination is obtained.通过回归分析得出材料性能与热处理工艺参数之间的关系式，并得出最优工艺组合；
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9·The credibility of the relational expression is checked using 174 liquefaction and non-liquefaction case histories, which proves the expression has a correct rate of 71.2%.用174个现场液化勘察资料对该式的可靠性进行了检验，结果表明：该式的判别正确率可以达到71.2%。
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10·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。