sci分区是按大类还是小类
期刊目录网SCI相关知识2023-07-13 17:56关注(1)
sci分区是按大类还是小类?sci期刊是有分区的,分为中科院分区、JCR分区。两种分区都是比较权威的分区方式,但一般用中科院分区的多一些。中科院分区分为大区小区,我们查询期刊的时候其实不难发现。一般来说是看大区的,接下来,详细的介绍一下。
一、JCR分区
JCR分区,又称汤森路透分区法,按降序排列上一年某一学科所有期刊的影响因子, 然后分为四个比例相等、均为25%的区域。一区是前25%,二区是25%~50%,三区是50%~75%,剩下的75%~100%是四区。
二、中科院分区
中国科学院分区是由中国科学院国家科学图书馆制定的分区。也分为四个区,但分类标准与JCR略有不同。按期刊三年平均影响因子划分,分区比例不再平均25%。前5%为一区; 6%~20%为_ 区; 21%~50%为三区;最后50%为四区。
以上是针对sci分区是按大类还是小类的内容介绍,仅供参考,如果有人员想要了解更多关于sci分区的内容,可以咨询本站的学术顾问为您解答。
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