Fuzzed of Lower and Upper Approximation in Incomplete Information System
在不完备信息系统中上、下近似的模糊化

The uncertainty of objects is considered in the incomplete information system.Based on the uncertainty of objects,the method in which lower and upper approximation are fuzzed,i.e.,the lower and upper approximation is a pair of fuzzy sets,was discussed in the incomplete information system.One hand,lower and upper approximations are decidedby the similarity relation;on the other hand,the objects with uncertainty due to * is existent.Therefore,the uncertainty degree of an object and similarity degree among the...