
浏览全部资源
扫码关注微信
晋中学院计算机科学与技术学院
纸质出版:2011
移动端阅览
李俊丽. 一种改进的概率关系模型及其应用研究[J]. 中北大学学报(自然科学版), 2011,32(2):169-173.
李俊丽. An Improved Probabilistic Relational Model and Its Application[J]. 2011, 32(2): 169-173.
为了解决概率关系模型(Probabilistic Relational Model
PRM)中投影不合理的缺点
针对PRM模型存在的缺陷对其进行了改进.把概率关系数据库中的元组进行了有效的划分
分为相互独立元组和互不相容元组
并且给出了改进后不同类型元组的投影操作.此外
在传统的房屋中介管理系统中应用了概率关系模型.该系统表明:增加概率属性之后的关系模型与之前的相比
数据的直观性增加了
程序的运行速度提高了.通过数据表可以形象地了解一条记录的特性
从而提高了工作效率.
Some improvements were made to solve the unreasonable projection problem of PRM model by classifying the tuples of probabilistic relational database into two classes
independent tuples and incompatible ones
and the projections of the both classes were conducted.The PRM was applied in a real house-agency management system.This system provided more intuitive data and faster running speed of its program.The data table made the characteristics of a record better understandable.The working efficiency of the whole system was improved.
Dey D,Sarkar S.A probabilistic relational model and algebra[J].ACM Transactions on Data base Systems,1996,21:339-369.
王珊,陈红.数据库系统原理教程[M].北京:清华大学出版社,2002.
李石君,郑鹏,周洞汝.一种灵活的概率关系数据库模式及代数[J].计算机工程与应用,1999,35(11):23-24.Li Shijun,Zheng Peng,Zhou Dongru.A flexible probabilistic relational databases model and algebra[J].ComputerEngineering and Applications,1999,35(11):23-24.(in Chinese)
高红梅,马元,孙志挥.基于概率关系数据库模型的研究[J].东南大学学报(自然科学版),2000,30(2):17-20.Gao Hongmei,Ma Yuan,Sun Zhihui.Research on probabilistic relational database model[J].Journal of SoutheastUniversity(Natural Science Edition),2000,30(2):17-20.(in Chinese)
李石君,谭成予,刘海青,等.一种概率关系数据库系统[J].计算机工程,2001,27(2):45-46.Li Shijun,Tan Chengyu,Liu Haiqing,et al.A probabilistic databases model and algebra[J].ComputerEngineering,2001,27(2):45-46.(in Chinese)
袁鼎荣,严小卫,陈宏朝.一个新的概率数据模型[J].计算机应用研究2003,20(10):65-67.Yuan Dingrong,Yan Xiaowei,Chen Hongchao.PRM:a probabilistic data model[J].Application Research ofComputers,2003,20(10):65-67.(in Chinese)
马垣.非经典关系数据库理论[M].北京:清华大学出版社,2005.
王梓坤.概率论基础及其应用[M].北京:科学出版社,1976.
Cheng R,Kalashnikov D V,Prabhakar S.Evaluating probabilistic queries over imprecise data[C].In Proceedings ofthe 2003 ACM SIGMOD International Conference on Management of Data,ACM Press,2003:551-562.
周傲英,金澈清,王国仁,等.不确定性数据管理技术研究综述[J].计算机学报,2009,32(1):8-10.Zhou Aoying,Jin Cheqing,Wang Guoren,et al.A survey on the management of uncertain data[J].ChineseJournal of Computers,2009,32(1):8-10.(in Chinese)
殷泰晖.C#编程从基础到实践[M].北京:电子工业出版社,2007.
0
浏览量
80
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621