In fact, the questioner's intention is very simple, that is, to name the PDF file. In this regard, I have explored several rules and recommended the following naming methods: journal name (abbreviation of English journals) _ year _ (whether the author's name can be added according to preference) _ title (abbreviation of subject words, it is recommended to keep most of the original titles). Its advantages are as follows:

It is easy to group according to different journals, because different journals have differences in grades, disciplines and paper preferences, which is more conducive to organization and subsequent review.

When you need to find an article, just remember the publication year or periodical, and you can find the attached page by browsing quickly. I also use document management software. After comparing endnote, mendeley, notefirst and Noteexpress, I chose Noteexpress. The interface is a bit poor, but it is fully functional and easy to use. I don't usually use the automatic renaming function provided by NE. It seems that the name can only be changed according to the topic information of the paper.