Research On The Optimal Route Selection Of Passengers Based On Air-rail Transport Super-network

In recent years,with the improvement of people's living standard and the construction of transportation network,high-speed railway with the advantages of safety,comfort and speed has gradually become an important choice for passengers to travel in a long distance.The rise of high-speed railway has seriously affected the occupation of civil aviation in passenger transport market and brought unprecedented challenges to civil aviation transport.In order to solve the problem of competition in the passenger transport market,China railway corporation and the civil aviation administration signed the strategic cooperation agreement on the promotion of air-rail combined transport,striving to build a win-win situation of joint cooperation.Under the background of the rapid development of air-rail combined transport integration,the network operation mode of air-rail combined transport has become imperative.In order to better promote the development of air and rail combined transport,to provide passengers with more convenient travel scheme for long-distance travel.This thesis introduces the super network theory into the air-rail combined transportation network,using Pajek software,MATLAB software and Origin software to study the topological characteristics and robustness of the air-rail combined transportation super network,and constructs a travel cost function according to passenger travel needs.Provide the optimal travel path for passengers in the intermodal transportation super network:(1)The behavior of passengers using high-speed rail,civil aviation and other transport means to realize cross-city travel is defined as the long-distance travel of passengers,and the whole travel process is divided into inter-city travel and intra-city travel,so as to carry out network analysis of long-distance travel;Taking the cities where high-speed rail stations or civil aviation airports exist as nodes,there are connecting edges between the two cities with civil aviation or direct high-speed rail.Select 336 nodes and 10343 edges to construct high-speed rail subnets,and select 219 nodes and 2916 edges to construct civil aviation subnets,Select 218 nodes and 109 edges to construct a multi-subway transfer subnet in the city.The three sub-networks are connected through the transfer sub-network to construct an air-rail combined transportation super network and a super node sub-network,and use Pajek software to draw its topology model.(2)To select 4 static topological parameters of complex network,such as node degree,average path length,clustering coefficient and point intermediary,and use Pajek software,MATLAB software and Origin software to respectively network the air-rail combined transportation super network and super node sub-network The characteristics are quantitatively measured,and the results show that the node degree distribution of the air-railcombined transportation network conforms to the exponential distribution,the average path length is 2.538,and the average clustering coefficient is 0.687,which is consistent with the characteristics of the small world network.The node degree distribution of the super-node sub-network conforms to the exponential distribution,the average path length is 2.573,and the average clustering coefficient is 0.711,which is also consistent with the characteristics of the small world network.From the perspective of passenger travel efficiency,the network efficiency is selected as the evaluation basis.The robustness of the network under different attack methods is analyzed,and the results show that the transfer node has an irreplaceable role in the entire super network.(3)Based on the characteristics such as the average path length and large clustering coefficient of the small air-rail combined transport supernetwork and the super-node network,a conditional assumption is made on the travel cost function of the passenger,and travel cost functions with the objectives of time and economic cost are constructed according to different travel modes.On the premise of passenger travel rules,the depth traversal search algorithm and Path Deletion algorithm of the figure were adjusted to search three shortest paths for travelers to choose;Taking the xian-beijing air-railway combined transportation network as an example,MATLAB software was used to solve the travel path selection model,and three optimal paths with the goals of minimum time cost,minimum economic cost and minimum time-economy comprehensive cost were obtained respectively,so as to verify the feasibility and practicability of the model.