| With the rapid development of container multimodal transport,its proportion in cargo transportation increases year by year,occupy more and more important position.At the same time,China’s comprehensive transport development is unbalanced,inadequate problems are still prominent,objective existence: multimodal transport accounted for a relatively low proportion,customized,professional transport service product supply and the rapid growth of demand and other problems.The problem is largely restricted to multimodal transport network construction ability,so the container multimodal transport market competition also has from the port scale competition into a container multimodal transport network competition,reasonable and effective network structure of container intermodal transportation,actualizing the container multimodal transport activities organized,scale,It is also the key to build smooth "railway + sea" combined transport channel,"road + sea" combined transport channel,strengthen resource linkage,complementary advantages,and improve port operation efficiency.Based on complex network theory and weighted BBV network structure evolution model,this paper analyzes the structure evolution of container multimodal transport network from the dynamic perspective.Based on the literature review and the theory of complex network,the structure evolution of container multimodal transport network is studied.First of all,from the right to network structure features and weighted network structure two aspects,select suitable to describe the indicators of container multimodal transport network structure characteristics,including the right to features include network density,centrality,average path length,cluster coefficient,degree and degree distribution,such as weighted features include weighted aggregation coefficient,strength and distribution,core-edge structure and so on.Secondly,from the typical complex network evolution model,the selection of weighted BBV network evolution model,and introduces the gravity model,build based on the gravity model of weighted BBV network evolving model of the network,by comparing the actual network and the network of the evolution of structure characteristic index,which verify that the evolution of rationality and validity of the model.Finally,the dynamic mechanism and periodic law of the evolution of container multimodal transport network structure are summarized.From the empirical analysis results:(1)compared with 2010,2020 network structure in the network for container transportation in northeast area density,centrality,cluster coefficient and average path length of the index value in optimizing the network structure characteristics,degree distribution,and at the same time point intensity distribution also meet the characteristics of power law distribution,confirmed that the network with small-world and scale-free properties;(2)The rationality of the weighted BBV network evolution model based on gravity model for analyzing the structural evolution of container multimodal transport network is verified;(3)The analysis shows that the structure of container-sea-rail combined transportation network in Northeast China from 2010 to 2020 has gradually shifted from the polarization agglomeration development stage to the radiation expansion stage under the influence of agglomeration and diffusion evolution.At the same time,the paper puts forward some suggestions on the development of container sea-rail network structure in northeast China. |
