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relation algebra

  • 关系代数

网络释义专业释义英英释义

  [数] 关系代数

...量传递 ; 关系代数 ; 投影运算 ; 正确性 [gap=744]Key words: database; data quality; quality propagation; relation algebra; projection; accuracy ...

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短语

relation algebra theory 关系代数理论

fuzzy relation algebra 模糊关系代数

temporal relation algebra 时态关系代数

relation algebra operation 关系代数运算

probabilistic relation algebra 概率关系代数

approximate spatial relation algebra 近似空间关系代数

identical relation of algebra 代数恒等式

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  • 关系代数 - 引用次数：7

    In view of that,the researchers proposed a new rough sets model based on database system and redefined the core attributes and reduction based on relation algebra in order to take advantages of the very efficient set-oriented database operations.

    鉴于此,研究人员提出了新的基于数据库系统的粗糙集模型,在关系代数的基础上对核属性和约简进行重新定义,从而利用高效的面向集合的数据库系统操作。

    参考来源 - 基于粗糙集理论的属性约简算法研究
  • 关系代数

·2,447,543篇论文数据，部分数据来源于NoteExpress

Relation algebra

  • abstract: In mathematics and abstract algebra, a relation algebra is a residuated Boolean algebra expanded with an involution called converse, a unary operation. The motivating example of a relation algebra is the algebra 2X² of all binary relations on a set X, that is, subsets of the cartesian square X2, with R•S interpreted as the usual composition of binary relations R and S, and with the converse of R interpreted as the inverse relation.

以上来源于: WordNet

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