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- Query evaluation improvement and approximate functional dependencies (AFD) are two important research topics in data query and management. 摘要查询评估和近似函数依赖是数据查询和管理中非常重要的两个研究方向。
- In the theory of relational database,a relation which satisfies precisely a given set of functional dependencies and its closure is called as Armstrong relation [1,2] . 在关系数据库理论中 ,称恰满足给定函数依赖集及其闭包的关系为Armstrong关系。
- It emerges and develop in the environment and the realization of value and function depend on the environment. 它在一定的环境中存在和发展,其价值和功能的实现程度受到环境的制约。
- An inlining algorithm for mapping XML DTDs to relational schema is analyzed and studied.A mapping method with constraints and functional dependencies is proposed. 摘要 分析和研究了DTD模式到关系模式的内联映射算法,提出一种带约束条件和函数依赖的映射方法。
- Note: These functions depend on the locale settings of the server! 注意:这些函数依赖于服务器的地区设置。
- This paper deals with the semantics of null values in functional dependencies in database theory, and presents three different definitions of FDs in a single relation with marked nulls. 本文研究关系数据库理论中空值在函数依赖中的语义问题,提出了带标志空值的关系中函数依赖的三种定义。
- We shall take a closer look at the concept of functional dependence. 我们将周密地考虑一下函数相关的概念。
- Given attribute set and minimum cover set of functional dependencies over one relational schema, a new method for designing normalized XML schemas based on schema graph is proposed. 在给定关系模式的属性集及其函数依赖最小覆盖集的基础上,提出一种基于模式图的规范化XML模式设计方法。
- Under the IMC structure, the sensitivity functions depend linearly on a design transfer function and this makes it easy to satisfy the internal stability condition. 本文使用内模式控制之设计架构,藉由设计之转移函数反推而求得系统之灵敏度函数,将可易于满足系统内部稳定之条件。
- Functional Dependencies and Inference Rules for XML XML函数依赖及其推理规则
- Perform more functions depending on your testing program. 根据您的考试课程,执行更多功能。
- pseudotransitive rule of functional dependencies 函数依赖伪传递律
- To solve the equations these functional dependences must be determined by empirical or other means. 为解这些方程,必须用经验的或其他的方法来确定这些函数的相关性。
- minimal set of functional dependencies 极小函数依赖集
- union rule of functional dependencies 函数依赖合并律
- Extended Fourier diffraction theory was used, and a relation of function depended on incident angle. 该方法是傅里叶衍射理论的扩展,是一种依赖于入射角的函数。
- For the attributes pair where there is a functional dependency,the cost of finding the congeneric functional dependency is retrenched. 对于存在函数依赖的维属性对,节省了判断是否存在类函数依赖的操作。
- Coding DTD can test the logical implication problem of XML function dependency in linear time. 编码后的DTD能在线性时间内对XML函数依赖的逻辑蕴涵问题进行判定。
- After proposing a data model of unordered node labeled tree for XML databases,this paper defines a functional dependency among XML subtrees.In addition,an axio... 在无序的结点标记树数据模型上定义了XML子树间的函数依赖,并且给出了一套公理系统用来推导函数依赖,以解决函数依赖的蕴涵问题,最后证明了该公理系统是合理的。
- The functional dependency and multiple valued dependency in the relational database with null values are discussed. And the related defintions,rules and laws are given. 讨论了含空值关系数据库中函数与多值依赖;并给出了有关的定义、规则与定理.