Evaluation of Importance Level of Public Transit Terminal based on BA Scale-free Weighted Network

Based on current research and complex network theory, this paper compared the typical weighted network evolution models, and established the evolution model of gravity weighted network based on the BA scale-free network. Applying the model, the paper calculated the weights of nodes and links, and judged the weights of nodes to evaluate the importance level of public transit terminal. By the numerical simulation, the paper proves that the weight and its probability of nodes is power-law distribution and the degree and weight of nodes is linear relationship. The evolution model was verified based on survey data of Liuzhou in China.