1, ISSN number of the journal.

ISSN, the international serial number, is the legal symbol of a periodical in the world, which consists of 16 digits, each of which has a specific meaning. For example, the first two digits represent the country or region code, the third digit represents the publication period, and the fourth digit represents the language. Through the serial number, you can retrieve the relevant information of the journal.

2. DOI number of the paper

DOI, the digital object identifier, is the unique identifier of an article in the academic literature database, which consists of 10 letters and numbers. DOI number is unique and permanent, and it can link to the full text of the article. In academic papers, DOI numbers usually appear in the footer or body as text or hyperlinks.

3. the CN number of the paper

CN number is the unified serial number of China and the legal symbol of China periodicals, which consists of 12 digits. CN number usually appears on the cover of a periodical, the first two represent the province and the first city of Theory of Three Represents, and the last nine represent the serial number of the periodical. Through the CN number, you can retrieve the relevant information of the journal, such as the organizer, publishing cycle, publishing time and so on.

The role of periodical paper retrieval number

1. Confirm the authenticity and legality of the paper.

The retrieval number of a periodical paper is the identity of the paper in academic circles, and the authenticity and legitimacy of the paper can be confirmed by the retrieval number. ISSN number and CN number are the necessary marks of periodical papers, while DOI number is the only mark of papers in academic literature database. The existence of these retrieval numbers ensures the authenticity and legitimacy of the paper and prevents the publication and dissemination of false papers.

2. Convenient citation and retrieval of papers.

The retrieval number of periodical papers is an important means to facilitate the citation and retrieval of papers. When writing academic papers, other papers or documents need to be cited in the papers. At this time, if the cited literature has a retrieval number, it can be found conveniently and quickly, and at the same time, the accuracy and credibility of the citation can be improved.

3. Promote academic exchanges and knowledge dissemination.

The retrieval number of periodical papers is an important tool to promote academic exchange and knowledge dissemination. Through the retrieval number, scholars can easily understand the content and theme of the paper and judge whether the paper conforms to their own research direction and interest. At the same time, the search number can also help scholars track the latest research results and progress, and promote the in-depth development of academic research.