Periodical classification:
General periodicals:
Generally, it is divided into ordinary municipal periodicals, ordinary provincial periodicals and ordinary national periodicals. General periodicals are only provincial and national. Why should the word "ordinary" be used in front of national and provincial periodicals? Because there are also municipal, provincial and national core journals.
Core journals:
Through a set of scientific methods, the academic circles track and evaluate the quality of periodicals, classify and grade them, and call the most important level core periodicals. Generally speaking, core journals refer to the core journals in Peking University, that is, Chinese core journals. However, different units have different ways to identify the Chinese core, and the provisions of this unit shall prevail.
Generally, core journals are determined by Peking University, that is, the outline of Chinese core journals.
The establishment of core journals has a certain theoretical basis and scientific statistics, and different disciplines will have different lists of core journals. Moreover, core journals are a dynamic concept, and the list of core journals is generally revised once a year or every few years.
Features of periodicals:
(1) Timely reporting: Compared with books, periodicals have shorter publishing cycle, faster publishing speed, more quantity, novel content, wide distribution and great influence, and can timely reflect new scientific and technological achievements, new levels and new trends at home and abroad.
(2) Extensive content: most of the documents published in journals are original papers, and the information provided includes research methods, instruments and equipment, discussion of achievements, references, etc. In addition, the magazine also publishes literature review, dynamic introduction, conference news, book review, new book preview, product advertisement and so on. , the content is very rich.
Moreover, journals often publish other types of documents, such as conference papers, scientific reports, dissertations and so on. Important patents are often reported in journals.
(3) Continuous publication: The continuous publication of periodicals is not only beneficial to the transmission of information, but also records the development process of a certain subject or a certain research object in a historical and systematic way. Periodicals have a catalogue in each issue, and various indexes are compiled at the end of the volume or at the end of the year. Some journals also publish multi-volume or multi-year cumulative indexes to facilitate literature information retrieval.