Abstract:

This paper sets up a complex network which is based on 93 nations as nodes and on the gas trading flowing direction among nations or regions as edges, analyzes its weighted-less and weighted features, and shows a power-law and clustering distribution. Large trading volume can compensate the looseness of trade composition among clusters. Trading volume is proportional to trading relation numbers but nothing to do with the emergence of global trading groups. This paper offers a reference for China to make a scientific strategy in gas trade.
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Key words:  global trade, gas, complex network, weightedless network, weighted network

摘要：

应用复杂网络方法，构建了以93个国家为节点、以国家或地区间的天然气贸易流动方向为边的复杂网络，分析了2010年国际天然气贸易关系的无权和加权复杂网络结构特征。分析结果表明：国际天然气贸易关系分布具有幂律性和群簇性，较大的贸易量会弥补群簇间贸易结构的松散性；贸易量与贸易关系数量基本呈正比例关系，但全球贸易集团的出现与其贸易量的关系不大。研究结果旨在为我国的天然气贸易决策提供科学依据。

关键词: 国际贸易, 天然气, 复杂网络, 无权网络, 加权网络