RULES ACQUISITION OF INCOMPLETE FORMAL DECISION CONTEXTS BASED ON THREE-WAY CONCEPT LATTICES
SHUJING LI
Department of Mathematics and Statistics, Qinghai Nationalities University, Xining 810007, P. R. China.
LI FU *
Department of Mathematics and Statistics, Qinghai Nationalities University, Xining 810007, P. R. China.
*Author to whom correspondence should be addressed.
Abstract
This paper mainly discusses the rule acquisition of incomplete formal decision contexts based on three-way concept lattice. Firstly, we define the three-way concept lattice over the incomplete formal decision context, and illustrate it using the example. Secondly, we discuss the rules acquisition under the given incomplete formal decision context, and give out four kinds of decision rules and definition of redundant rule. Lastly, we study the judgment of consistent set of three-way concept lattices of incomplete formal decision context, and we give out the judgment theorem of consistent set based on AE-discernibility attributes set.
Keywords: Incomplete formal decision context, three-way concept lattice, rules acquisition, consistent set.