2018年中科院数学SCI期刊分区

2019年SCI期刊中科院分区介绍分区常识中科院的分区和Web of Science（WOS）的分区都是按照期刊影响因子(IF)作为指标对期刊进行评价的方法，如下表。

中科院WoS数量1-4区1-4区对象大类、小类小类依据近3年平均IF当年IF方法1区：前5%2区：5%-20%3区：20%-50%4区：后50%1区：前25% 2区：25%-50% 3区：50%-75% 4区：最后25%期刊的影响因子(IF)上述分区基本都由IF的大小决定，因此，我们需要首先了解什么是IF。

IF是加菲尔德在1972年提出的一个评价期刊的指标，体现了期刊发表的论文的平均影响力。

普赖斯认为科学论文一般在发表1～2年后，被人们所接受，从而达到被引用的峰值阶段。

因此，IF的计算公式的定义如下x年影响因子=（x-2年和x-1年所发表的论文在x年被引用的总次数/(x-2年和x-1年发文总数)于x+1年的6月份公布。

举个例子，x=2015年Nature期刊的IF，在2013年有论文860篇，在2014年有论文862篇，分别在2015年获得总被引频次是34618次和31056次，则2015年它的IF=(34618+31056)/(860+862)=38.138于2016年的6月份公布。

有了上述知识，小伙伴们就可以自己使用Web of Science的数据来预测某个期刊的影响因子啦。

什么？WoS网站打不开？哦，那你的网络可能是没有使用权限（需要购买了它的数据库才可以）。

好办！WoS为了方便用户使用，做了巧妙的设计。

找一个有访问权限的好基友，让他在有权限的电脑上打开WoS的网址，然后将此链接复制发给你就可以了。

这样你就可以在任意有网络的地方方便地使用WoS的数据库啦。

当然，这波操作是有时间限制，当天夜间12点过后就失效。

基础版与升级版2019年起，将同时发布两个版本的期刊分区表：基础版和升级版。

基础版延续了去年年的方法体系，供2019-2021年的三年过渡期使用。

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中科院分区标准
中科院分区标准是一种用于衡量学术期刊高低水平的评价体系。

该评价体系由中国科学院于1998年提出，并在2002年和2009年分别进行了更新和完善。

目前，中科院分区标准已经成为中国学术界和国际学术界公认的重要指标之一。

中科院分区标准主要是根据期刊的收录情况以及期刊文章被引用的情况来评价期刊的学术地位。

根据中科院分区标准，期刊可分为四个区域：一区、二区、三区和四区。

其中，一区为最高级别，四区为最低级别。

以下是中科院分区标准的详细列表：
一区：该区域包括了收录在SCI（社会科学引文索引）和SSCI（社会科学引文索引扩展版）数据库中的期刊。

这些期刊通常具备国际影响力，发表的论文数量和被引用次数较高。

二区：该区域包括了收录在A&HCI（艺术与人文科学引文索引）、CPCI-S（科学引文索引扩展版）和CPCI-SSH（社会科学和人文科学引文索引扩展版）等数据库中的期刊。

这些期刊在其领域中具有一定的学术影响力，发表的论文数量和被引用次数较高。

三区：该区域包括了被其他引文索引数据库收录的期刊，如EBSCO、ProQuest或者其他引文索引数据库。

这些期刊发表的论文可以被查阅，但是其影响力不如一区和二区期刊。

四区：该区域包括了没有被任何引文索引数据库收录的期刊。

这些期
刊很难被查阅，其学术地位和影响力较低。

总体来说，中科院分区标准为学术期刊的评价提供了一个清晰的框架，使读者和作者能够更好地判断期刊的学术地位和质量。

对于科研人员
而言，选择发表论文的期刊至关重要，因此了解中科院分区标准是非
常有必要的。