1) Multivalued dependency (MVD)
多值依赖(MVD)
2) multivalued dependency(MVD)
多值依赖
1.
the definition of preserve multivalued dependency(MVD),alg orithm of preserve multivalued dependency set,algorithm of generated m ultivalued dependency set and algorithm of join tree was presented and provied base on data dependency.
基于数据依赖基本概念给出了保持多值依赖(MVD)集的定义，提出了构造联接树的算法，生成MVD集与保持MVD集的检验算法，同时对算法给出了证明。
3) multivalued dependency
多值依赖
1.
Algorithm for constructing Armstrong relation in multivalued dependency schema;
多值依赖模式上Armstrong关系的构造算法
2.
The problem of inference rules for multivalued dependency is the key to solve implication problem between dependencies in XML and the key problem of XML normalization theory.
XML多值依赖的推理规则集问题是解决XML数据依赖的蕴涵问题的基础,是XML规范化理论的关键问题之一。
3.
It is based on the normalization theory of functional dependency and multivalued dependency′s concept,the definitions of multivalued dependency′s split and splitfree multivalued dependency set are given,good properties of splitfree multivalued dependency set,the algorithms and conditions of splitfree cover of multivalued dependency are provided.
基于函数依赖规范化理论及多值依赖基本概念,给出了多值依赖的分裂、无分裂多值依赖集等定义,提出了满足无分裂多值依赖集的良好特性,以及无分裂多值依赖集的判定算法,并且提出分裂多值依赖集存在无分裂覆盖满足的条件及其算法。
4) pres erve multivalued dependency(preserve MVD)
保持多值依赖
5) temporal multivalued dependency
时态多值依赖
1.
Based on the process of normalization of traditional relational database, the concepts of temporal multivalued dependency (TMVD) with multiple time granularities based on temporal functional dependency and the theory of multivalued .
基于时态函数依赖和多值依赖理论提出了多时间粒度约束的时态多值依赖(TMVD)等概念,并给出了时态多值依赖的推理规则,对其有效性、完备性进行了证明。
2.
Based on temporal functional dependency and the theory of multivalued dependency of traditional relational database the concepts of temporal multivalued dependency with multiple time granularities were introduced.
据此,基于时态函数依赖和传统关系数据库多值依赖理论提出了多时间粒度约束的时态多值依赖的概念和相关的引理、定理,并对引理、定理的有效性和完备性进行了证明,为时态数据库的进一步规范化奠定了理论基础。
6) fuzzy multivalued dependency
模糊多值依赖
1.
This paper discusses the quality of fuzzy multivalued dependency.
本文探讨了模糊多值依赖的性质,对单一模糊多值依赖环境下的推导规则进行了补充;给出了求依赖基的算法;讨论了在模糊函数依赖、模糊多值依赖混合作用下的推导公理系统;介绍了模糊嵌入多值依赖的概念及公理系统。
补充资料：多苯基多亚甲基多异氰酸酯
多苯基多亚甲基多异氰酸酯，简称PAPI，或称粗MDI，浅黄色至褐色粘稠液体．有刺激性气味。相对密度(20℃／20 ℃)1．2，燃点218℃。PAPI实际上是由50％MDI与50％官能度大于2以上的多异氰酸酯组成的混合物。升温时能发生自聚作用。溶于氯苯、邻二氯苯、甲苯等。PAPI的活性低，蒸气压低，只是TDI的百分之一，故毒性很低。
用于制造聚氨脂胶粘剂。也可直接加入橡胶胶粘剂中，改善橡胶与尼龙或聚酯线的粘接性能。贮存于阴凉、通风、干燥的库房内，远离火种、热源。严格防水、防潮，避免光照。
用于制造聚氨脂胶粘剂。也可直接加入橡胶胶粘剂中，改善橡胶与尼龙或聚酯线的粘接性能。贮存于阴凉、通风、干燥的库房内，远离火种、热源。严格防水、防潮，避免光照。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条