引文网络的出度分布特征研究——以国际图书情报学论文引文为例

Characteristics of the Out- degree Distribution of Citation Network:References from Original Articles of LIS As Examples

以2000-2011年SCI、SSCI收录图书馆学情报学研究型论文的引文为数据来源,分析了出度分布特征及其演变。在此基础上归纳了引文网络中出度分布特征及其形成机制:2000-2003,引文量较小,出度分布特征可以由指数衰减函数近似表征,增长机制起主要作用;2004-2007,引文量为1的论文数比例减小,出度分布偏离指数衰减函数,增长机制和择优连接机制共同起作用;2008-2011,引文量为1的论文数比例较小,出度分布特征可以由对数正态分布函数近似表征,出度分布由择优连接机制控制。论文最后对这些特征的成因进行了分析。

Based on reference source from original articles published in Social Sciences Citation Index database （ SSCI ） and Science Cita- tion Index database （SCI） from 2000 to 2011, this paper analyzed the out-degree distribution of citation networks and its evolution. The out-degree distribution characteristics and its genetic formation mechanisms were summarized： There are three stages for out-degree distri- bution ： the In＇st stage, 2000-2003, with small citation amount, the out-degree distribution can be described by the exponential attenuation function resulting from the main work of growth mechanism; the second stage, 2004-2007, the transitional stage, the rate of paper with one reference becomes small and the growth mechanism and preferential attachment work together to make the out-degree distribution ; the third stage, 2008-2011, the rate of paper with one reference is smaller, its out-degree distribution can be described by the log-normal dis- tribution function and the preferential attachment obviously controls the process. The reasons of these characteristics were analyzed subse- quently.