1 and SCI: 1 are updated once a year and the latest version will be updated in 2022.
2.SSCI: updated once every six months, in June and 65438+February every year.
3.EI: Sometimes it is/kloc-0 once a year, sometimes it is twice a year. In recent two years, the update frequency is relatively high, and the update time is uncertain.
4. A&HCI:1year, and the update time is usually around1month every year.
5.scopus:65438+ updated once in October.
The above are all commonly used periodical databases. You can select periodicals in the latest periodical catalogue according to the update time of the database. You can also purchase or retrieve periodicals directly through the internal network of the unit that has purchased the corresponding database. Of course, if you can't choose a periodical because of your poor English, you can trust us privately!