基于复杂网络的锌矿石国际贸易格局演化特征分析

近年来国家之间的贸易往来越来越频繁，锌矿石的国际贸易格局不断发生改变。通过对2010-2019年锌矿石国际贸易数据进行系统分析，构建以国家为节点，国家之间存在的贸易联系为边的锌矿石国际贸易有向加权复杂网络，分析国际锌矿石贸易网络演变特征，识别出贸易核心国家及枢纽国家，并提出相应的对策建议，以期为我国制定锌矿石贸易政策提供参考。研究表明：锌矿石贸易规模不断扩大，贸易关系集聚在少数国家的局面逐渐被打破，贸易全球化的趋势越来越强；中国锌矿石贸易量多年位列第一，处于贸易枢纽中心。建议利用好合作伙伴关系的优势，在进口方面与澳大利亚、秘鲁等国加强合作，同时提高冶炼技术，以缓解供应压力。

EVOLUTIONAL CHARACTERISTICS OF ZINC ORE INTERNATIONAL TRADE PATTERN BASED ON COMPLEX NETWORK

Zinc ore international trade pattern is changing continuously as international trade surges. In an attempt to provide references in making zinc trading policies, this paper uses international zinc ore trading data from 2010 to 2019 to establish a directional weighted zinc trade complex network with countries as nodes and trade links between countries as edges, with which its evolution is analyzed and key and pivot nations are identified. The results show that zinc trade size is escalating. The number of countries participating in trade is increasing, and trade tends to be globalized. China's zinc ore trading size has been ranked number one for many years and China is in the center of trading. It suggests China should enhance cooperation with Australia and Peru in import and boost metallurgical technologies so as to guarantee its zinc ore supply.