| In the past ten years,high-speed railway has developed rapidly in China.Both the traffic mileage and max speed are in the leading position in the world.The opening of high-speed railway not only provides convenient and fast transportation mode for the residents of the cities along the line,but also promotes the comprehensive competitiveness of the cities.Taking Xi’anChengdu High-speed Railway opened at the end of 2017 as an example,this paper analyzes and calculates models of accessibility and regional economy by selecting a total of 15 node cities along the line.At the same time,according to the calculation results,the accessibility and regional economic indicators of the node cities before and after the opening of Xi’an-Chengdu High-speed Railway are analyzed and demonstrated.Finally,the clustering analysis of node cities is carried out by using SOM neural network algorithm.These models are used in this paper: the shortest average travel time,weighted average travel time and daily accessibility to evaluate the accessibility indicators,and models of economic potential and spatial interaction to evaluate the regional economic indicators.Based on the detailed analysis of the models,they are constructed by using MATLAB,and the complete GUI interface and interaction process are designed,and the calculation results are output by various graphical tables.Based on the analysis of the impact of Xi’an-Chengdu Highspeed Railway on the cities along the line,this paper uses SOM clustering method,taking these models as the analysis dimension,and classifies the cities along the line and summarizes the results.Through the analysis of the calculation results,it can be seen that the opening of Xi’anChengdu High-speed Railway has significantly improved many indexes of Xi’an and Chengdu urban agglomerations,and has completely changed the traffic appearance of the cities along the line,such as Hanzhong and Guangyuan.Xi’an-Chengdu High-speed Railway has strengthened the traffic and connection of the cities along the line,promoted the integration process of the cities along the line,formed the urban economic zone along the Xi’an-Chengdu High-speed Railway,and greatly closed the space distance between Shaanxi and Sichuan. |
