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- functional dependency theory [计] 功能依赖理论, FD理论
- Resource dependency theory (RDT) offers this lens. 资源附庸理论(RDT)提供这个透镜。
- In this paper,based on rough set theory and relational database,the relationship between rough relational database and fuzzy relational database is analyzed systematically from functional dependency,normal form and Armstrong axiom. 以粗糙集理论(Rough Set Theory)和关系数据库理论为基础,从函数依赖、范式理论、Armstrong公理等方面系统地研究了粗糙关系数据库(Rough Relational DataBase,简称RRDB)与模糊关系数据库(Fuzzy Relational DataBase,简称FRDB)之间的关系。
- Resource dependency theory can also help to explain interlocking directorship. 资源依靠理论还有助于解释连锁董事制的必要性。
- He flip-flopped on dependency theory, a more radical version of structuralism developed by Latin American Marxists. 对于拉美马克思主义者发展出的比结构主义更加激进的依赖理论,他的态度摇摆也不定。
- 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。
- In Brazil, a professor, who actually used to teach the dependency theory, launched a program of economic reform that looked a lot like shock therapy. 在巴西,一位曾经教授依赖理论的教授,发起了一个看起来非常像休克疗法的经济改革项目。
- 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。
- 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。
- 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。
- Though rich in raw materials, Latin America seemed doomed to perpetual poverty. The dependency theory of economic development seemed to offer a way out. 尽管自然资源丰富,但拉丁美洲却似乎注定长期贫穷,经济发展的依赖理论似乎能够提供一条出路。
- 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。
- 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.
- In order to inquiry into function dependency in data base, the formal definition and semantics of dependency of knowledge are also discussed in the paper. 为了研究数据库中的函数依赖性,我们还将介绍数据的依赖性的形式化定义及依赖性的语义因素等。
- 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。
- In recent years, some researchers, for example ,Altbach in America, borrowed the Dependency Theory to analysis the difficult position of the higher education in undeveloped countries. 近年来,高等教育研究者以阿尔特巴赫为代表运用该理论分析发展中国家高等教育的现实困境。
- 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。
- Using the definition of functional dependency set and Armstrong axiom, it is given the optimum alogrithm of the minimum functional dependency set from attribute set closure in this paper. 在数据库设计中;依据函数依赖集的定义及Armstrong公理;求出的是一个可能存在冗余的函数依赖集.;为了判断一个函数依赖是否为某一函数依赖集逻辑蕴含;只要用求属性闭包的方法求出函数依赖中决定子的属性闭包;判断依赖于是否包含在属性闭包中即可
