通过分析出版周期因素导致的文献引用“时间几率”不相等的客观现象,发现了目前在计算期刊影响因子过程中一直存在的没有添加时间等效因子的问题。经计算研究后给出了适宜不同出版周期期刊的“时间等效因子”和解决这一问题的具体的计算方法。 By analyzing the literature references cited by the publication cycle factors, the phenomenon of “time odds” is not equal, we found that there is no problem of adding time equivalents in the calculation of periodical impact factors. After calculation and research, this paper gives a “time equivalent factor” suitable for different periodicals and solves the specific calculation method of this problem.