The Result Comparison of CEN development in Three Years

摘要

As the rapid advancement of the Internet,the CEN's (China Education Network)links both in and out documents change quickly.In the research of documents which belong to.edu.cn domain it is found that the network is seven times more than the original one.In this essay two networks'topological properties by the node degree distribution are studied and ten schools are picked up to have a contract with the ones three years before.The networks' incoming and outgoing degree distribution both has a power law tail both in 3years ago and now.By analyzing the practical data,it is found that the fluctuations of schools'page amounts are different in different schools but most of the schools'pages amounts are in an upward trend.Also there are huge changes in the percentage of the pages having outgoing page(s)in ten schools selected at random.As the former documents of China Education Network are located in four different levels,most of the documents now are located in five different levels or four levels,and they both constitute a complex directed network by self-organization.