Study On The Influence Mechanism Of High-speed Transportation Network On Regional Spatial-temporal Pattern Evolution From The Perspective Of System Dynamics

The construction of transportation network is the foundation for the development of national economy and social undertakings,as well as an important support and guarantee for the development of various economic and social undertakings.As an important component of regional transportation systems,high-speed transportation networks have multiple impacts on urban construction and development,including optimization of industrial structure,improvement of travel convenience,and changes in population aggregation status.Therefore,exploring the spatiotemporal shaping effect and internal driving mechanism of high-speed transportation networks on regional patterns is the main issue of this article.This paper establishes a spatial effect measurement model and a system dynamics model from the perspectives of macro spatial effect and micro system dynamic mechanism,taking into account the four factors of transportation,economy,industrial structure,and population.It analyzes the evolution process of three types of high-speed transportation networks,the spatiotemporal impact of high-speed transportation network evolution on regional development patterns,and the internal mechanism of high-speed transportation and regional multiple factors,Comprehensively analyze the impact effect and internal driving mechanism of high-speed transportation network evolution on regional spatial and temporal patterns.Based on the perspective of spatial effects,it is found that driven by the evolution of high-speed transportation construction from "none" to the formation of trunk lines,and then to the gradual development and improvement of the network,the regional transportation accessibility pattern exhibits an obvious "core edge" structure,and the improvement effect of high-speed transportation network on accessibility gradually decreases from the middle to the outer periphery;The pattern of regional economic ties is characterized by a radial structure with Beijing as the core.High intensity economic ties show an evolutionary trend of extending vertically from north to south,and the corridor effect of high-speed transportation network is significant;The pattern of regional population agglomeration shows a gradual increase in spatial dependence,and driven by high-speed transportation networks,it gradually evolves from low to high aggregation to high aggregation.Based on the perspective of dynamic mechanism,it is found that the completion of high-speed transportation has a positive impact on the overall economy,industrial structure,and population within the system.Investing in the construction of high-speed transportation infrastructure has improved the transportation supply capacity within the region,expanded the spatial and temporal distance of factor flows within the region,led to changes in passenger traffic volume,changes in the number of employed people,and reshaped regional agglomeration,further achieving the optimization of the industrial structure,namely,the increase in the proportion of the tertiary industry and the number of employed people,thereby achieving an improvement in the socio-economic level,Ultimately,it will affect the change in the investment proportion of high-speed transportation,achieving a closed-loop system.In summary,the evolution of high-speed transportation network has produced a spatiotemporal compression effect on regional development,constantly reshaping the spatial and temporal patterns of regional transportation,economy,industrial structure,and population,while becoming a driving force for the interaction of multiple factors within the region,achieving improved regional transportation supply capacity,increased economic aggregate,optimized industrial structure,and improved population aggregation.