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本文对文献被引按年代分布进行分析,通过对物理学的专著、期刊文章和学位论文三种文献类型做具体分析,主要分析指标包括:发表(出版)年份、发表(出版)后开始被引用的年数、开始增长明显的年数、第一次出现最大被引量(即为被引高峰)的年数以及高位段持续时间等。文章得出评价三种文献类型的合理时间,即评价期刊文章和学位论文通常需要4-7年,专著则是6-10年。同时也得出在判断文献价值时除了被引总量作为判断标准外,高位段持续时间长短、峰值高低也可以作为评价的参考指标。
In this paper, we analyze the citation distribution by age, and analyze the three literatures of physics monographs, journal articles and dissertations. The main analysis indexes include: publication (publication) year, publication after publication Year, the number of years of obvious start to increase, the number of years when the maximum quoted quantity (that is, the peak of being cited) appears for the first time, and the duration of the high segment. The article concludes that a reasonable time to evaluate three types of documents is that evaluation of journal articles and dissertations usually takes 4-7 years and monographs 6-10 years. At the same time, it also concludes that in judging the value of documents, in addition to the quoted total amount as a criterion, the duration of the upper segment and the peak value may also serve as reference indexes for the evaluation.