With it embedded in the explanation of the weight RIN graph, via defining knowledge exchange distance among bodies, this paper conducts a study on modifying the typical routes\' length of RIN bodies.

Referring the concept of the symmetric difference of sets,from the viewpoint of the granular computing,knowledge distance in information systems is defined in the paper,and its properties are studied too.

This paper introduces the notion of "distance of knowledge",and it substitutes for these factors such as knowledge coding,abstraction extent and the buy s knowledge base.

During bargaining over the price of knowledge,the buyer and the seller evaluate synthetically the trust relation between them and the distance of knowledge away from the buyer to overcome the obstacles of information asymmetry,and adjust the price according to it until they are consistent with the price.

Distance estimation is the behavior in actual spatial environment, which is based on acquiring the distance knowledge.

The knowledge interaction is an important alement affecting innovation ability of regional innovation system.

Based on the complexity of knowledge base of products,this paper makes typology for inter-organizational knowledge interactions,which helps to discuss the IORs from the knowledge-based view.

The concept of knowledge exchange rate is advanced in this paper for exactly describing the essence of RIN.