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基于相似度对Rough关系数据库检索 被引量:3

Information retrieval of rough relational database based on similarity
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摘要 Rough关系数据库模型(rough relational database model,RRDM)是对关系数据库模型的一种扩展,它具有在很大程度上比较符合真实世界情况的特性。介绍了Rough集和Rough关系数据库(rough relational database,RRDB)等相关概念,着重讨论如何在RRDB中通过Rough集中的上、下近似计算数据间的相似度来检索出需要的数据,给出了相关算法和实例分析。 The rough relational database model is an extension of the relational database model. In large degrees, RRDM relatively answers for the facts of the real world. Some concepts of rough sets and the rough relational database are briefly introduced, and then how to retrieval the need data based on the similarity of data with the upper and lower approximation of rough sets in RRDB is mainly discussed. Finally an algorithm and a real example are given.
出处 《计算机工程与设计》 CSCD 北大核心 2007年第17期4213-4214,4228,共3页 Computer Engineering and Design
基金 江西省教育厅科技计划基金项目(赣教技字[200631号) 南昌大学校基金项目(Z-03323)
关键词 相似度 粗糙集 粗糙关系数据库 检索 知识约简 similarity rough sets RRDB retrieval knowledge reduction
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