Abstract Based on the formal decision context containing multi-valued decision information, the concept of the ordered formal decision context and the correlated theory of ordered decision concept lattice are proposed. In addition, the decision rule of the ordered formal decision concept lattice as well as the confidence level and the support degree of the rule is given, and the significance of decision rules in the practical application is discussed. Furthermore, the rule-preserved attribute reduction is defined. Meanwhile, the attribute reduction method of ordered decision concept lattice structure preservation is obtained. Finally, the relationship between the rule preserved reduction and the lattice structure preserved reduction of the ordered formal decision context is discussed.
Fund:Supported by National Natural Science Foundation of China (No.11371014,11071281)
About author:: ZHANG Jing, born in 1990, master student. Her research interests include formal concept analysis and rough set theory. WEI LingCorresponding author, born in 1972, Ph.D., professor. Her research interests include formal concept analysis and rough set theory.
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2016, Vol. 29 
