天然气国际贸易网络演化及区域特征研究——基于社会网络分析方法

On the Evolution of Natural Gas International Trade Network and Regional Variations

世界天然气资源分布的不均匀性以及供需的时空差异性,使得天然气在区域范围内难以实现市场均衡,天然气必须在全球范围内流动。运用社会网络分析方法(SNA)深入研究天然气国际贸易网络演化及其区域特征,通过计算网络点度数与点强度、网络结构熵以及聚集系数等指标并分析其区域结构发现,天然气国际贸易网络不是典型无标度网络,但整体上存在异质性,即贸易不均匀,局部表现出聚集性,网络呈核心边缘结构,同时网络区域结构有所差异,网络趋于更密集、更均匀。

The global natural gas resources distribute unevenly and most countries have an imbalance of natural gas production and demand, which lead that the natural gas within regions can not realize market equilibrium, so natural gas must flow globally. This article combines the complex network theory with social network analysis method, discusses the international trade network pattern and its evolution process. The results show that the natural gas international trade network is not typical scale-free network, but there is heterogeneity compared to random network, also clustering for the whole network; natural gas network has differential area, and the network gradually evolutes into a more dense and homogeneous network .