中国学科知识网络的演化研究——基于1981-2010年引文数据

Evolution of discipline knowledge network in China——Empirical data from 1981 to 2010

基于1980-2010三十年的重要中文学术期刊中文献之间的引用关系数据,分析了中国学科知识网络的演化过程.这30年的数据被分为三部分:1981-1990、1991-2000和2001-2010,分别构建学科知识网络并分析其特征.通过对比分析,结果表明中国学科知识网络是一个规模较小但高度连接的网络.它的连接结构是均匀的,但是权值的分布却具有幂律分布的特征.在30年中,网络的连接紧密程度大幅增加,但是其度分布的均匀性和边权分布的不均匀性却一直存在.通过建模分析可知,中国学科知识网络的特征源于其固定的节点数目、重要节点之间优先建立连接以及重要节点之间边权值优先增加的演化规律.

The evolution process of discipline knowledge network of China is studied based on the citation data of important academic journals from 1981-2010. The data include three parts, which are 1981- 1990, 1991 2000 and 2001-2010. Comparative analysis results show that the network is a small but high connected network. It has a homogeneous structure and heterogeneous weight distribution. In the past 30 years, its connection increased significantly but has little change in its homogeneous structure and heterogeneous weight distribution. Modeling analysis shows that its special features result from the evolution rules of fixed number of nodes, preference attachment and preference weight growth of important nodes.