1) multi-relation semi joins
多关系半连接
1.
A new optimization algorithm for database query based on multi-relation semi joins is proposed,on basis of which improvement is further made.
提出了一个普通的多关系半连接操作查询优化算法,并在该算法基础上加以改进,结果表明:当Card(R)远远大于Card(R)时,改进算法减少了数据的传输量,减少了查询的总代价,从而操作效率大大的提高。
3) k_n connecting relations
kn连接关系
4) graph of connection
连接关系图
1.
The method,which was used to enhance constraint semantics,was put forward under analyzing the relativity of correlation condition,and the mapping relation between the graph of connection and the graph of correlation was conducted to achieve the information model of correlation.
通过分析关联关系相关性,提出关联关系定义中的拓展性约束语义的方法,利用设计的连接关系图到关联关系影射关系,建立了关联关系信息模型,并提出了面向分区的协同设计平台结构。
5) contact relation algebras
连接关系代数
6) connection relationship matrix
连接关系矩阵
1.
This paper analyzed the characters of connection relationship of regular graphic,formally described the generating process of regular graphic and the algorithm of connection relationship matrix.
文章分析了规则图形连接关系的形成特点,利用图论的思想形式化地描述了规则图形的形成过程及其连接关系矩阵的生成算法,并给出了基于SVG格式的图、数一体化的开放格式表达方法。
补充资料:经济关系(见生产关系)
经济关系(见生产关系)
economical relation
1 ingji gU口nxj经济关系(eeonomieal relation)系。见生产关
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