Which is more likely to contribute, rare metals or rare metal materials or projects?

Which is easier to contribute, rare metal materials or engineering?

(1) From 1997 to now, that is, from 14, all regular periodicals have been searched by SCI;

(2) This journal has almost 2-3 issues of supplements every year. There are meetings in the supplement, and some are considered unsuitable for publication, so there are supplements. According to incomplete statistics, the SCI inclusion rate of our supplement is also above 80%. According to SCI database, except for two supplements in 2008, the journal was not retrieved by SCI. The rest seems to have been retrieved by SCI, which is also the reason why the influence factors of SCI in this journal have been declining continuously.