期刊的被引半衰期是指该刊上历年发表的论文在某一年内被统计源刊所引用的次数中 ,较新的一半是在最近多长的一段时间内发表的平均年数。一般说来 ,此值越大 ,表明该刊上发表的论文时效性较长 ,即多年前发表的论文仍在被大量引用 ,从而也说明该刊的影响更为深远。因此 ,被引半 Journal citation half-life refers to the publication of the journal over the years, the number of citations in a given year, the source of citation statistics, the new half is published in the recent period of time the average number of years. Generally speaking, the larger this value, indicating that the papers published in the Journal of longer validity, that is, many years ago published papers are still a large number of references, which also shows that the impact of the Journal more far-reaching. Therefore, be cited half