Dynamic evolution analysis of network structure of transactional community

With the development of research on the complex networks, dynamic evolution of network structure has become a hot issue for the current study. In this paper, we completed the dynamic evolution analysis of network structure through three steps. First of all, by the social network analytic method, the paper described the dynamic change of real network model´s three basic properties, namely, degree distribution, clustering coefficient, average path length. Then, on this basis, we put forward a dynamic evolution model with the characteristics of this type, which was based on connection mechanism between existed nodes. At last, by using computer simulation the scale-free network model with variable power rate and the evolution model based on connection mechanism between existed nodes were constructed under the same network parameters. The values of three basic characteristic parameters were calculated and compared with those of the real network model, which to some degree verified the validity of the model proposed in the paper.