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Mathematical Problems in Engineering
Volume 2013, Article ID 808901, 6 pages
Research Article

Study of Evolution Model of China Education and Research Network

1Department of Electronic Information and Electric Engineering, Changzhou Institute of Technology, Changzhou 213002, China
2German Research School for Simulation Science, 52062 Aachen, Germany
3Business School, University of Shanghai for Science and Technology, Shanghai 200093, China

Received 2 September 2013; Revised 18 November 2013; Accepted 18 November 2013

Academic Editor: Zidong Wang

Copyright © 2013 Guoyong Mao and Ning Zhang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


By searching the hyperlinks with domain name “” 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.