Differences
This shows you the differences between two versions of the page.
— | bradford_law [2016/11/21 11:34] (current) – created - external edit 127.0.0.1 | ||
---|---|---|---|
Line 1: | Line 1: | ||
+ | ==Bradford Law [布萊德福定律]== | ||
+ | 「布萊德福定律」(Bradford' | ||
+ | |||
+ | 若將收集所有有特定主題相關文章的期刊種類,將這些期刊分為三個區段(a, | ||
+ | |||
+ | > 根據某學科各種期刊所含相關文獻篇數的多寡,依據遞減次序排列,這些期刊將可分為一個核心區(a區)及連接的數區,且每一區包含大約相同的文獻篇數,則各區期刊種數的比例將呈現 1: n : n^2的關係,其中n大約是5。 | ||
+ | |||
+ | |||
+ | ==Meta / Backlinks | ||
+ | {{backlinks> | ||
+ | {{tag> |