摘要
In this paper, based on rough set theory and relational database, the relationship between rough relational database (RRDB) and fuzzy relational database (FRDB) is analyzed systematically from functional dependency, normal form and Armstrong axiom. The results show that both fuzzy functional dependency and rough functional dependency are the generalizations of classical functional dependency.Fuzzy normal form is the expansion of classical normal form while rough normal form is an independent system.RRDB and FRDB obey Armstrong axiom to some extent from the point of view of inference rule.
In this paper, based on rough set theory and relational database, the relationship between rough relational database （RRDB） and fuzzy relational database （FRDB） is analyzed systematically from functional dependency, normal form and Armstrong axiom. The results show that both fuzzy functional dependency and rough functional dependency are the generalizations of classical functional dependency. Fuzzy normal form is the expansion of classical normal form while rough normal form is an independent system. RRDB and FRDB obey Armstrong axiom to some extent from the point of view of inference rule.
出处
《南昌工程学院学报》
CAS
2006年第2期117-121,共5页
Journal of Nanchang Institute of Technology
基金
NaturalScienceFoundationofShanxiProvince(No .2006011038 ).
