1, Class T: Special periodical papers, which refer to papers published in Science and Nature.
2. Class A: authoritative core journals refer to papers collected by the internationally accepted retrieval systems of SCIE, EI, ISTP, SSCI and A&HCI (subject to the retrieval by China Institute of Science and Technology Information), or papers on the same subject published by authoritative Chinese core journals in China, excluding reportable abstracts, abstracts and news.
3. Class B: Important core journal papers refer to papers published in foreign core journals (see Handbook of Foreign Science and Technology Core Journals) or papers with important influence published in Chinese core journals of similar disciplines in China.
4. Class C: The general core periodical papers refer to the papers published in "Overview of National Chinese Core Periodicals" and "Peking University Library 20 10 Edition".
5. Category D: Papers published in general public journals refer to papers published in domestic public journals (journal numbers "CN" and "ISSN" with postal codes).
6. Class E: Papers published in restricted public publications refer to papers published in domestic publications that are publicly released but restricted (only periodical number, no mailing code).
The role of publishing a paper:
It is not only a means to discuss and study academic problems, but also a tool to exchange academic research results. Different people have different functions in publishing papers:
1, title evaluation (promotion of title): graduate students need to graduate; When teachers, medical staff, personnel of scientific research institutes and employees of enterprises are promoted to a higher level, publishing periodical papers is a necessary reference index.
2. Application for funds and projects: When the education, science and technology and health systems apply for projects of the National Natural Science Foundation of China, other fund projects and various research projects every year, the papers are published as a conclusive display of the research results completed by the funds or projects.
3. Research in basic fields all over the world, such as medicine, mathematics, physics, chemistry, life sciences and other fields. Publicly publishing papers is a display and report of the latest scientific research achievements and research methods. Promote the scientific and technological progress of the whole society.