Research On Community Detection And Characteristics Of Urban Shared Cycling Network

With the development of new Internet technologies,the sharing of new public transportation has changed the traditional mode of public transportation.As a bicycle-sharing that mainly solves short-distance travel,the distribution of OD points of each ride constitutes a bicycle riding network,and the closely related nodes in the network form a community in the bicycle riding network.Different from the community in the sense of urban planning,the cycling group can be regarded as the cycling range,which has the characteristics that the frequency of bicycles in the cycling group is higher than it in the cycling groups.The network community detection method can be used to identify the cycling group of the bicycle riding network and help to understand the division and characteristics of the cycling group,so as to discover the operating rules of urban non-motorized traffic.Firstly,the bicycle OD data of the bicycle-sharing is used to establish a bicycle riding network in the downtown area of Shenzhen and Futian District,Luohu District and Nanshan District.The Shenzhen is divided into a grid of 500×500 meters,and the grid is regarded as a node in the bicycle riding network,the bicycle flow between the grids is used as the side of the bicycle riding network,and the weight is given to the side by the bicycle flow frequency to establish a directed weighted bicycle riding network.Then,the Louvain unoverlapping community detection method based on modularity optimization is used to identify the communities in each bicycle riding network as a cycling group,and use the Arc GIS to realize the spatial visualization of the cycling group.Finally,analyze the changing characteristics of the cycling group’s boundary and the changing characteristics of the main cycling group.Summarize the spatial factors affecting the boundary division and stability of the cycling group,the spatial distribution characteristics and forming conditions of main cycling group of different administrative regions.In addition,put forward relevant suggestions for two aspects: optimal scheduling of bicycle-sharing,establish the bicycle road network system.Through analysis,it is found that the road intersections,park and greenbelt are the main factors affecting the division of cycling groups.The bicycles near the subway station have a fixed range of riding,and the more dense the subway station,the more stable the cycling range and the closer between the cycling groups.The spatial distribution of the main cycling group is affected by the functions of each administrative district.The land types richness and POI concentration are the main basis for determining the main cycling group.In addition,the cycling space in the downtown area of Shenzhen has s ignificant gathering characteristics,Futian District and Luohu District are integrated,while Nanshan District is relatively independent.