The title of the paper says "signature of the paper". A paper generally consists of title, author, abstract, key words, text, references and appendix. Papers are often used to refer to articles that conduct research in various academic fields and describe academic research results, which are referred to as papers for short.

Thesis is not only a means to discuss problems and conduct academic research, but also a tool to describe academic research results and conduct academic exchanges. Including academic papers, graduation papers, dissertations, scientific papers, achievement papers and so on. Paper keywords are selected from the title, abstract and text of the paper, and they are words with substantive significance to express the central content of the paper.