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	Normalized-scale relations and their concept lattices in relational databases
	Lei, Yuxia1,2; Sui, Yuefei; Cao, Cungen
刊名	Fundamenta informaticae
	2009
卷号	93期号:4页码:393-409
关键词	Relational databases Formal concept analysis Concept lattices Plain scaling Derived relations Normalized-scale relations
ISSN号	0169-2968
DOI	10.3233/fi-2009-110
通讯作者	Lei, yuxia(leiyuxia@ict.ac.cn)
英文摘要	Formal concept analysis (fca) is a valid tool for data mining and knowledge discovery, which identifies conceptual structures from (formal) contexts. as many practical applications involve non-binary data, non-binary attributes are introduced via a many-valued context in fca. in fca, conceptual scaling provides a complete framework for transforming any many-valued context into a context, in which each non-binary attribute is given a scale, and the scale is a context. each relation in relational databases is a many-valued context of fca. in this paper, we provide an approach toward normalizing scales, i.e., each scale can be represented by a nominal scale and/or a set of statements. one advantage of normalizing scales is to avoid generating huge (binary) derived relations. by the normalization, the concept lattice of a derived relation is reduced to a combination of the concept lattice of a derived nominal relation and a set of statements. hence, without transforming a relation into a derived relation, one can not only determine concepts of the derived relation from concepts of given scales, but also determine concepts of the derived relation from concepts of a derived nominal relation and a set of statements. the connection between the concept lattice of a derived nominal relation and the concept lattice of a derived relation is also considered.
WOS关键词	FORMAL CONCEPT ANALYSIS ; DISCOVERY ; SUPPORT
WOS研究方向	Computer Science ; Mathematics
WOS类目	Computer Science, Software Engineering ; Mathematics, Applied
语种	英语
出版者	IOS PRESS
WOS记录号	WOS:000268792300004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2398910
专题	中国科学院大学
通讯作者	Lei, Yuxia
作者单位	1.Chinese Acad Sci, Inst Comp Technol, Key Lab Intelligent Informat Proc, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Lei, Yuxia,Sui, Yuefei,Cao, Cungen. Normalized-scale relations and their concept lattices in relational databases[J]. Fundamenta informaticae,2009,93(4):393-409.
APA	Lei, Yuxia,Sui, Yuefei,&Cao, Cungen.(2009).Normalized-scale relations and their concept lattices in relational databases.Fundamenta informaticae,93(4),393-409.
MLA	Lei, Yuxia,et al."Normalized-scale relations and their concept lattices in relational databases".Fundamenta informaticae 93.4(2009):393-409.

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