| Reasonably optimizing resource allocation and improving bus operation efficiency are theoretical and practical issues that urgently need to be resolved in the current public transport optimization process.Through the exploration of the combined bus dispatching model,it can effectively enhance the attractiveness of public transport,improve passenger satisfaction and bus sharing rate,and it is important to give priority to the development of public transport.This article analyzes in depth the problems of China’s bus operation model,supply and demand resource constraints,and existing dispatch models.Based on the research results at home and abroad,analyze the characteristics of bus passenger demand,combined with the existing bus resource allocation,analyze and explore the optimization model of the combined dispatch of the whole train and the express station.According to the current situation,corresponding optimization methods are proposed.The main research contents are as follows:(1)Explain the basic theory of bus dispatching,and analyze the resource constraints affecting bus dispatching,as well as the status and existing problems of bus dispatching.This is to determine the main purpose and content of the passenger flow survey.Combined with the data to analyze the characteristics of bus passenger flow.It also proposes a method for selecting stations to stop at express stations of large stations.At the same time,based on the distribution of the number of residents taking the station,the nature of the land around the station and the transfer capacity of the station,a OD matrix backstepping model is proposed.(2)Based on resource constraints,with the goal of minimizing the total cost of the bus system consisting of passenger travel time cost and bus company operating cost,establish an optimized model for combined scheduling of urban bus full-stop and large station express,and adopt immune mixed particle swarm The algorithm model is solved and the necessary parameters of the algorithm are explained.(3)Taking the No.3 bus in Dalian as an example,based on the existing bus resource conditions,build a combined scheduling model,and comparatively analyze the total system cost under different schemes before and after optimization.The optimization plan of the bus stop and the frequency of the bus stop of the 3-bus is proposed.Compared with the traditional operation mode,the total cost of the system is reduced by 5.25%,and the operating cost of the bus company is reduced by 12%.It is proved that the combined scheduling optimization model constructed has certain practical reference value. |