Abstract
By searching the hyperlinks with domain name “.edu.cn” which constitutes the China Education and Research Network, we build a complex directed network containing 366,422 web pages containing 540,755 URLs. These URLs constitute a complex directed network through self-organization. By analyzing the topology of China Education and Research Network, we found that it is different from the common Internet in several aspects. Most of the vertices have incoming links, a few vertices have outgoing links, and very few vertices have both incoming and outgoing links. The vertex distribution has a power-law tail. A large proportion of newly added edges always connect with those pages selected from one subnetwork that they belong to, instead of connecting with the pages selected from the whole network. According to these features, we presented the evolution model of this complex directed network. The results indicate that this model reflects some main characteristics of China Education and Research Network.
Highlights
By analyzing the topology of China Education and Research Network, we found that it is different from the common Internet in several aspects
The results indicate that this model reflects some main characteristics of China Education and Research Network
The research on complex networks is developing at a brisk pace, and significant achievements have been made in recent years; among them is the introduction of scale-free network and related models [1,2,3,4], as it makes big progress in revealing the characteristics of dynamic evolution of complex networks
Summary
The research on complex networks is developing at a brisk pace, and significant achievements have been made in recent years; among them is the introduction of scale-free network and related models [1,2,3,4], as it makes big progress in revealing the characteristics of dynamic evolution of complex networks. More than 1000 universities and research institutes have been connected to this network so far It has 36 regional network centers and main nodes, which are distributed among different provinces of China. Compared with the large number of researches that has been done on the general Internet [10,11,12,13], only a few work is on CERNET can be found From these studies we found that the features of CERNET are different from those of the general Internet, especially in the structure and formation mechanism [14, 15]. The CERNET we analyze is a virtual network made up of web pages where “.edu.cn” is included in the addresses of all these pages In this network, all web pages are nodes, and all the hyperlinks in these pages that link to other pages are the directed edges.
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