These documents are parts of four different levels, and they constitute a complex directed network by self_organization.

经分析发现该网络的网页分别处于四个不同的层次上，各网页自组织连接构成一个复杂有向网络。

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According to these features, the evolvement model of this complex directed network has been proposed. This model reflects some main characteristics of the China Education network.

根据中国教育网的这些特点提出了该有向网络的演化模型，模型反映了中国教育网的一些主要特征。

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