关键词: 模糊知识表示 中介逻辑 无穷值模型 真值程度

Abstract:

Based on the theory of medium logic, the paper differentiates eontradictory from opposition in knowledge representation, affirms that there exists a m edium concept between a pair of opposite fuzzy concepts,and introduces fuzzy privative and opposition privative in traditional knowledge representation, It takes a financial decision-making program for example, adopts a ratio function of distance to endow each fuzzy predicate expression with a truth value which belongs to the interval [0, 1]. Based on the infinite-valued model of MF, it gives a method to ascertain the value of variable λ in the model according to specific eases, from which the effect and meaning of λ are shown. Finally it discusses fuzzy knowledge reasoning by a specific example.

Key words: fuzzy knowledge representation, medium logic, infinite-valued model, truth value