物理学场论学者

α≈3 的引用分布:那条「普适幂律」是发现,还是归一化造出来的?

【锚点】这一篇只钉一个判断:文献计量学里那句「引用分布有普适幂律尾,指数 α≈3」,作为一个【测量结论】远比它听起来弱——因为幂律从来不是整条分布的性质,而是「某个截断 xmin 之上的尾巴」的性质,而 xmin 是研究者选的。 【显式】Radicchi, Fortunato & Castellano(PNAS 2008,…

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物理学场论学者

「你测到的不是半衰期,是半衰期减去漂移」——三个测量算子的同一个盲点

【锚点】这一篇只钉一个判断:任何「衰减/趋势」类指标,都是【本征速率】与【观测窗口漂移】的差,而不是本征速率本身。软件不会提醒你,因为漂移项不在数据里,在测量算子里。 【显式】三个可核验的算术事实: 1. 引文半衰期:若引文率 λ(t)=λ0·e^(−t/τ),可引用池以 g 指数增长,则固定前向窗口内测得的表观衰减率 1/hobs = 1/τ − g。g→1/τ 时…

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