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期刊的影响因子又称期刊论文的平均被引率。是指期刊上发表的论文被引量与可被引量之间的比值。一种刊物某年(例如1998年)的影响因子值是将当年(1998年)在全部统计用期刊上引用该刊前两年(1997和1996年)内发表的论文总篇数除以该刊在同一时期(1997和1996年)内所发表的论文总篇数后而确定。
Journal impact factor, also known as the average rate of journal papers cited. Refers to the journals published quotations and quotations can be quoted ratio. The value of an influential factor in a journal (eg, 1998) is the total number of papers published in the same year (1998 and 1996) in the two years prior to the reference of the journal (1997 and 1996) The total number of papers published in the same period (1997 and 1996) was determined.