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- Workflow engine on top of temporal relational algebra 基于时态关系代数的工作流引擎
- temporal relational algebra 时态关系代数
- In relational databases, an operator in relational algebra. 在关系数据库中,关系代数用的一种运算符。
- Temporal Extension of Relational Algebra Operators 关系代数操作符的时态扩展
- What are the features of temporal relations that generate a beat? 产生一个拍的时间关系的特征是什么?
- In relational algebra, the problems I discussed in this article are called relational division. 在关系代数中,我在本文中讨论的问题称为关系划分。
- By this algorithm, Z language can also describe the temporal relations easily. 利用这一算法 ;Z语言也能方便地描述时序关系 .
- From the perspective of relational algebra,decomposes any query to the sub-query on data partitioned horizontally and the post-query on merged intermediate results. 从关系代数的角度,将任意查询分解成对水平数据分区的子查询和汇总中间结果的后处理查询。
- In this paper, characterizations of temporal relational data are discussed. Definitions of temporal normal form relational schema are given, process of its normalization is discussed briefly. 本文研究了时态关系数据的特征,给出了时态范式关系模式的定义,简述了其规范化过程.
- We not only propose an effective summary scheme, meanwhile, we also inspire the idea of summarizing spatial location information with temporal relations. 我们不只提出了一个有效的摘要机制,同时也引进一个以时间轴为主,配合空间资讯进行摘要的概念。
- Relational Algebra and Relational Calculus 关系代数与关系演算
- ER() also gives a set of integrity rules.ER() expends relation model and relation algebra and uses object oriented and relation model to present multidimensional data. ER()给出了一组完整性规则.;扩充了关系模型和关系代数;使得能用关系对象模型表示多维数据
- This paper introduces the concept of generalized fuzzy relation and extends relational algebra operators such as union, intersection, difference, Cartesian product, selection, projection etc. 文中引入了广义模糊关系的概念,讨论了广义模糊关系代数的操作:广义模糊并、广义模糊交、广义模糊差、广义模糊笛卡尔积、广义模糊投影和广义模糊选择等。
- The major functions prepositions: Apart from the spatial and temporal relations, prepositions call be used to indicate a manner in which an action is done, an instrument with which. 示空间和时间外,还可表示动作进行的方式,完成任务所使用的工具,以及瞄准的目标等。
- original relational algebra operators 原始算子
- Simulation and the experimental results showed that the algorithms are effective in suppressing cloud clutters strongly spatial and temporal related, and they are easy to be implemented. 实验及仿真结果表明,该算法能够抑制空间和时间相关性强的云杂波背景,且算法简单。
- derived relational algebra operators 关系代数的派生算子
- The word is a temporal conjunction. 该词是表示时间的连词。
- Logical operators describe the relational algebraic operation used to process a statement. 逻辑运算符描述了用于处理语句的关系代数操作。
- The Pope has no temporal power in modern society. 教皇在当代社会没有世俗方面的权利。