發(fā)布時間：2018-07-28 21:47

【摘要】：國際鐵礦石貿(mào)易系統(tǒng)是一個復(fù)雜的系統(tǒng)，鐵礦石資源在貿(mào)易主體間的流動形成了國際鐵礦石貿(mào)易網(wǎng)絡(luò)。使用復(fù)雜網(wǎng)絡(luò)的方法進(jìn)行研究，不僅能夠反映貿(mào)易主體對鐵礦石的供需狀況，而且可以對鐵礦石貿(mào)易網(wǎng)絡(luò)進(jìn)行描述，了解其結(jié)構(gòu)特征，分析貿(mào)易主體在鐵礦石貿(mào)易中的角色地位。 本文首先對世界鐵礦石資源現(xiàn)狀、供需結(jié)構(gòu)、貿(mào)易格局、貿(mào)易方式等進(jìn)行分析，發(fā)現(xiàn)當(dāng)前世界鐵礦石貿(mào)易呈現(xiàn)由澳大利亞、巴西、印度等國家向中國、日本、歐盟等國家和地區(qū)輸送的貿(mào)易格局。在此基礎(chǔ)上，通過對國際鐵礦石貿(mào)易市場的抽象，應(yīng)用復(fù)雜網(wǎng)絡(luò)理論構(gòu)建了國際鐵礦石貿(mào)易網(wǎng)絡(luò)，從小世界屬性、無標(biāo)度特征、貿(mào)易主體角色和地位等角度對國際鐵礦石無權(quán)貿(mào)易網(wǎng)絡(luò)的結(jié)構(gòu)特征進(jìn)行分析。發(fā)現(xiàn)其具有較短的平均路徑長度，但集聚系數(shù)不大，，不具備小世界屬性；使用度分布測算出鐵礦石貿(mào)易網(wǎng)絡(luò)不是典型的無標(biāo)度網(wǎng)絡(luò)，進(jìn)口貿(mào)易比出口貿(mào)易更具有異質(zhì)性；用中心性指標(biāo)判斷無權(quán)貿(mào)易網(wǎng)絡(luò)節(jié)點(diǎn)的角色地位，發(fā)現(xiàn)世界上的大多數(shù)鐵礦石進(jìn)出口國在貿(mào)易網(wǎng)絡(luò)中占據(jù)中心地位。以鐵礦石貿(mào)易量作為權(quán)重，構(gòu)建國際鐵礦石加權(quán)貿(mào)易網(wǎng)絡(luò)，并對其強(qiáng)度分布、集聚系數(shù)進(jìn)行分析。結(jié)果顯示，加權(quán)貿(mào)易網(wǎng)絡(luò)同樣不是典型的無標(biāo)度網(wǎng)絡(luò)，且群聚性較差。對鐵礦石貿(mào)易網(wǎng)絡(luò)進(jìn)行核心邊緣結(jié)構(gòu)分析發(fā)現(xiàn)，鐵礦石出口大國澳大利亞、巴西、印度和進(jìn)口大國中國、日本均長期處于網(wǎng)絡(luò)核心區(qū)域，半邊緣區(qū)域國家不多，大多數(shù)貿(mào)易國處于邊緣區(qū)域。 本文國際鐵礦石貿(mào)易網(wǎng)絡(luò)的研究源于我國所面臨的鐵礦石需求激增、國內(nèi)礦山供給不足、國外礦商壟斷市場的現(xiàn)實矛盾。通過研究世界鐵礦石貿(mào)易網(wǎng)絡(luò)，得出了其結(jié)構(gòu)特征和結(jié)構(gòu)形態(tài)，以期能夠?qū)ξ覈F礦石進(jìn)口戰(zhàn)略提供一定參考。
[Abstract]:The international iron ore trading system is a complex system, and the flow of iron ore resources among the main trading bodies forms the international iron ore trade network. The method of complex network can not only reflect the supply and demand of iron ore, but also describe the structure of iron ore trade network. This paper analyzes the role of the main body of trade in iron ore trade. This paper first analyzes the current situation of iron ore resources in the world, the structure of supply and demand, the structure of trade, the pattern of trade, and so on. It is found that the current world iron ore trade is coming from Australia, Brazil, India and other countries to China, Japan, etc. European Union and other countries and regions transport trade pattern. On this basis, by abstracting the international iron ore trade market and applying the complex network theory, the paper constructs the international iron ore trade network. This paper analyzes the structural characteristics of the international iron-ore unauthorized trade network from the perspective of the role and position of the main body of trade. It is found that iron ore trade network is not a typical scale-free network, and import trade is more heterogeneous than export trade. It is found that most of the iron ore importing and exporting countries in the world occupy the central position in the trade network by using the central index to judge the role of the nodes in the unauthorized trade network. Taking the iron ore trade volume as the weight, the international iron ore weighted trade network is constructed, and its intensity distribution and agglomeration coefficient are analyzed. The results show that the weighted trade network is not a typical scale-free network, and the clustering is poor. An analysis of the core marginal structure of the iron ore trading network shows that Australia, Brazil, India and China, as well as Japan, have been in the core of the network for a long time, while there are not many countries in the semi-marginal regions. Most trading countries are on the fringes. The research of the international iron ore trade network in this paper originates from the sharp increase of iron ore demand in our country, the shortage of domestic mine supply, and the realistic contradiction of foreign miners monopolizing the market. Based on the study of the world iron ore trade network, the structural characteristics and structural forms of the network are obtained in order to provide a reference for China's iron ore import strategy.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：F416.1;F746

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