THE ACCESSIBILITY AND HIERARCHY OF NETWORK CITIES IN THE GLOBAL INTERNET
基于2008年全球互联网地图，用网络分析方法测量79个网络节点的可达性矩阵和距离矩阵，建立了78个网络城市的层级结构，发现世界城市在互联网国际出口选择上具有优势，且地理位置仍很重要。
According to the global Internet map of 2008,we measured the total accessibility matrix(T) and the shimble distance matrix(D) of 79 network nodes using network analysis methods,and established 78 network cities hierarchy on the basis of total accessibility matrix,shimble distance matrix,total bandwidth and connectivity data of city itself.This paper indicated that world cities had the advantage of original selection of Internet international export,and the role of geographic location was still very important.The total accessibility matrix of every network city has significant location bias of the United States and Europe,in which New York,London,Frankfurt,Paris,Amsterdam and Washington are the keys.The top eight cities in the network cities hierarchy are the keys of every city's shimble distance matrix.The network cities hierarchy in the global Internet is a kind of new hierarchy based on the old world city hierarchies.Every city's ranking in the network cities hierarch has a strong correlation with the role in the global Internet,global financial centre index,international air traffic,GDP and synthesized competitiveness of city itself.