Characteristics of Functional Polycentricity of PRD Urban Region Based on Passenger Traffic Flow
利用社会网络方法分析珠三角各汽车站进出站客流数据，测量该区域功能多中心性水平，发现其网络具有规模效应、距离效应等特征，且多中心性水平较高、呈离心趋势。
The study on the characteristics of functional polycentricity of urban regions based on functional contacts is the inevitable requirement from the global integration and informationization development. Carrying on researches on the functional polycentricity of PRD urban region is crucial in theory and practice. By using social network method, this paper taking the inflow and outflow of each bus station as the passenger traffic flow to analyze the characteristics of the network of passenger traffic flow, measures the level of functional polycentricity of PRD. The results indicate that the network of passenger traffic flow of PRD contains certain characteristics, such as the scale effect in quantity, the scale effect in geographical space, the distance effect,the orientation and structure effect. Based on the quantitative measurement, the research shows that the level of functional polycentricity of PRD is relative high, which shows significant centrifugal effect. The research also finds that the functional polycentricity of PRD is scale sensitive, presents the change in certain direction, contains regional difference,and gets the same variation tendency in different functional network.