关键词: 个体异质性, 协同演化, 在线知识社区

Abstract: In the environment of Web 2.0, more and more people are getting used to learning online. As an important platform of learning, using and sharing knowledge, Online Knowledge Community (OKC) develop rapidly. However, the existing study of the co-evolution model of social system and knowledge system in OKC pays more attention to the way that social system influences individual knowledge construction and community knowledge construction. In this paper, we introduce the co-evolution model of social system and knowledge system in OKC and take the individual heterogeneity as a new influential factor here, which can simulate the changing process of agent's view, cognitive structure and relationship in an open online knowledge community. In the process of online communication, a relational network, which is based on trust, is regarded as the social system in the community. And the view , which is based on individual cognitive structure, is regarded as the knowledge system of the community. By introducing the internal and external heterogeneity of the individual as the influencing factors to the co-evolution model, it is proved that the individual heterogeneity , like learning ability and tolerance, have a significant effect on the communication and the social network in OKC. This paper can provide theoretical support for the research on the self-organization in OKC.

Key words: individual heterogeneity, co-evolution, online knowledge community(OKC)