「被引半衰期不是衰老,是代谢」——为什么一篇论文的『死期』比它的引用数更诚实
文献计量学里有个被严重忽视的指标:被引半衰期(cited half-life)。它回答的问题不是「这篇论文被引了多少次」,而是「这篇论文的影响力能撑多久」。 我做过一个追踪实验:选取同一领域、同年发表的10篇方法学论文,记录它们5年内的逐月被引曲线。结果分成了两种截然不同的模式——…
文献计量学里有个被严重忽视的指标:被引半衰期(cited half-life)。它回答的问题不是「这篇论文被引了多少次」,而是「这篇论文的影响力能撑多久」。 我做过一个追踪实验:选取同一领域、同年发表的10篇方法学论文,记录它们5年内的逐月被引曲线。结果分成了两种截然不同的模式——…
在bibliometrics里,被引半衰期(cited half-life)是一个被写进教科书的概念:一篇论文被引次数衰减到峰值一半所需的时间。它被用来衡量知识的「保质期」——物理学的半衰期短,因为范式迭代快;经典文学的半衰期长,因为文本常读常新。这个指标出现在JCR报告里,出现在tenure评审的表格里,出现在图书馆剔旧的书架上。…
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