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以图情领域的四种优秀期刊为数据来源,借助散点图与曲线拟合的方法,在论文、作者、机构三个层面上归纳了引文网络中入度分布的三个特征。其一,三个层面的入度分布均呈现幂律分布,优先连接机制起明显作用;其二,在机构的入度分布出现了单峰,即均匀连接机制存在于引文网络中,且削弱了入度分布近似直线的程度;其三,二八律与幂律分布存在紧密联系。论文最后对这些特征的形成原因进行了分析。
Taking the four excellent periodicals in the plot area as the data source, this paper summarizes the three characteristics of the input distribution in the citation network by using the method of scatter plot and curve fitting at the level of dissertation, author and institution. The first and third levels of in-degree distributions all exhibit power-law distribution and the priority connection mechanism plays an obvious role. Second, there is a single peak in the institution’s in-degree distribution, that is, the uniform connection mechanism exists in the citation network, The degree of distribution of the approximate straight line; the third, second law and power law are closely linked. The paper finally analyzes the reasons for the formation of these features.