Research On The Characteristics And Evolution Of Complex Network Of International LNG Trade

Adequate energy supply is a basic condition for ensuring the development of the national economy.Among them,the safe supply of liquefied natural gas is an important part of it.At the same time,due to the uneven distribution of natural gas resources in various countries around the world,and the demand for natural gas varies from country to country Therefore,international LNG trade has been formed worldwide,thus forming a complex network of international LNG trade.As natural gas plays an increasingly important role in the energy strategies of various countries,it is of great significance for the study of international LNG trading networks.Based on the complex network method,this dissertation constructs the national LNG trade network in 2018 with the country as the node and the inter-country trade relationship as the edge.The relevant statistical characteristics of the unauthorized network and weighted network are analyzed.The Pareto's principle,which is the characteristic of power law distribution,the network has certain clustering and heterogeneity,and meets the characteristics of small-world networks and scale-free networks.Based on the analysis of network characteristics,this dissertation introduces the national attraction and distance to construct a weighted BBV evolution model algorithm based on national attraction and distance limitation.The dynamic evolution simulation analysis of the international LNG trade network in 2018 was performed.The evolved network was compared with the actual network,and the evolution network was found to have five items:average path length,average clustering coefficient,average degree,network structure entropy,and degree distribution.The characteristic indicators are basically consistent with the actual international LNG trading network,and the rationality and effectiveness of the model are verified.Then the model is further evolved and analyzed to obtain the international LNG trading network in 2021.The network characteristics are analyzed to find:(1)the average path The decrease in length indicates that the trade efficiency of the network has improved over time;(2)the average aggregation coefficient has increased,indicating that the nodes in the network are more closely connected;(3)the entropy of the network structure has become larger,indicating that the network disorder has increased(4)the increase in the average degree value,indicating that the national nodes in the network have increased the number of national trading partners with which they trade LNG;(5)the nuclear value becomes larger,indicating that the core level of the relevant national node in the network over time increase.At the same time,by analyzing the research results of relevant scholars and institutions,the reasons for the evolution of international LNG trade network in this paper are explained and analyzed.This dissertation is based on the "Energy Development Strategic Action Plan(2014-2020)" issued by the State Council,and based on the final evolution of the international LNG trading network,it proposes to strengthen infrastructure construction,strengthen interconnection,and actively seek cooperation for the development of China's LNG industry.And attach importance to LNG's external dependence and other relevant policy recommendations.Therefore,the analysis of the characteristics and evolution of the international LNG trade network has certain practical significance.