按照惯例，为保证期刊遴选和报告的公证公允，今年的《期刊引证报告》镇压了4种期刊(没给影响因子)。相关英文原文：https://jcr.help.clarivate.com/Content/title-suppressions.htm

镇压了4种期刊如下，这些期刊没有给影响因子，其中3本是因为引用堆叠，1本是因为自引过高(34%，中国也存在接近这个自引率的期刊，小心为上吧)：

Self Citation Suppressed Titles with Key Data Points

This table lists the categories for each journal (note that each journal may be included in multiple categories), the percentage of citations in the Journal Impact Factor numerator that are self cites, and the distortion in category rank due to self cites. The distortion in category rank is based on analysis of all journals in all categories of the JCR ranked both with and without the inclusion of self cites. Here distortion equals the percentage shift in rank with self cites included versus excluded.

Citation Stacking Suppressed Titles with Key Data Points

This table lists the recipient and donor journal pairs along with the percentage of citations in the Journal Impact Factor numerator that are from the donor to the recipient (x% of the JIF Numerator cites to Recipient journal from Donor journal). The percentage exchange to the Journal Impact Factor years is the proportion of all citations from donor to recipient (all years) that reference the two years considered in the Journal Impact Factor calculation (x% of all citations from Donor to Recipient were concentrated in the Journal Impact Factor years).

*Indicates donor journal has been dropped from coverage in Clarivate products

For more information, see the "Journal Suppression" section in the JCR 2023 Reference guide.