Analysis And Optimization Of Urban Public Transport Network Based On Complex Network

With the rapid development of urban economy,the scale of urban public transportation network is increasing,the demand for residents' travel is increasing,the contradiction between urban traffic demand growth and the insufficient supply capacity of public transportation network is increasingly prominent,and the problem of traffic congestion reduces the efficiency of bus network transportation and seriously affects people's life.Based on the complex network theory in this paper,the three aspects of topological property evaluation factor,transfer system performance analysis,bus network design and generation are studied in this paper,and the feasible scheme is provided for the design and optimization of urban public transport network.The specific research work is as follows:Representation method based on adjacent site of Qingdao city public transportation network model,this paper puts forward the calculation method of bearing pressure.Results showed that the Qingdao city public transportation network is a complex network of sparse connections,there is still a large space for development in public transportation networks.Due to the problems of large space and long computing time in traditional transfer calculation methods,this paper builds an urban public transit network model based on the P-space representation method and calculates the average number of transfers in the public transport network in Qingdao.By analyzing the factors affecting the transfer system,this paper proposes to use the average transfer distance as an index to evaluate the transfer performance among public transport stations,and effectively optimizes the average transfer times and average transfer distances of the public transport network in Qingdao.In view of the ubiquitous congestion problem in urban public transport networks,this paper analyzes the relationship between the topology structure of the public transport network and the network capacity,and finally determines that the non-scaled public transport network structure has a high passenger flow capacity.By combining the BA scale-free network model generation algorithm with the actual bus network,a bus network generation algorithm based on the interaction between stations is proposed,and part of the bus network in the southern part of Qingdao City with scale-free network structure is designed and generated.