The first signing unit refers to the first unit of the first author, and the unit marked with a is the first unit, or the unit that appears in front is the first unit, which has little to do with the first author and the correspondent, that is to say, the unit that will rank first by default is the first signing unit.

In the publication of SCI papers, the author's signature is very important, which is directly related to the author's vital interests. The signature of SCI papers has been puzzling many authors. Indeed, the signature of SCI papers is very complicated. In fact, the signature of a paper should be ranked according to the author's contribution to the paper, but the actual situation is often very complicated. The first unit is very important in the publication of SCI papers.

Supplementary information:

The thesis is an article that carries out research in various academic fields and describes academic research results. A paper generally consists of title, author, abstract, key words, text, references and appendix.

A thesis refers to an article that conducts research in various academic fields and describes the achievements of academic research. It is not only a means to discuss problems in academic research, but also a tool to describe academic research results in academic exchanges. Including academic papers, graduation papers, dissertations, scientific papers, achievement papers and so on.

A paper generally consists of title, author, abstract, keywords, text, references and appendices, some of which (such as appendices) are dispensable.