中介逻辑系统完整地反映了知识中的矛盾和对立等否定关系。针对具体处理模糊知识的需要，本文首先改进了中介无穷值语义模型，对其进行了语义描述；在此基础上扩展了Zadeh提出的近似推理方法即CRI算法，给出了基于中介逻辑思想的一种更为具体的算法，并通过一具体的例子进行了说明分析。

Medium logic completely reflects both the contrary relation and the contradictory relation. This paper firstly improves the infinitevalue semantic model for medium logic and then puts forth  a semantic interpretation. After that it expands the CRI algorithm put forth by Zadeh,and obtains another concrete algorithm based on the notion of medium logic. A special example validates the rationality of the extended algorithm at last.