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介绍可被引文献和"非可被引文献(non-citable document,NCD)的概念。对NCD的引证特征进行统计分析,证实了NCD是可被引用的,甚至还可能有极高的被引频次。通过文献计量学分析,探讨NCD对期刊影响因子的贡献度。
Introducing the concepts of citable documents and non-citable documents (NCD), a statistical analysis of the citation features of NCDs confirms that NCDs can be referenced and may even have extremely high Citing times.Through the bibliometrics analysis, discusses the contribution of NCD to periodical impact factor.