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What do [M] [D] and so on behind the references in the paper stand for?
Types of references: monographs [M], dissertations [D], reports [R], standards [S], patents [P], precipitated documents in the collection of papers [A], essays [C], newspaper articles [N] and journal articles [J].

Types of electronic documents: database [DB], computer [CP], electronic bulletin [EB]

The carrier types of electronic documents: Internet [OL], CD [CD], magnetic tape [MT] and disk [DK].

Various undefined documents: [serial number] principal, document title [Z], place of publication: publisher, year of publication.

For English references, it should also be noted that the author's name adopts the original principle of "surname comes first, surname comes last", and the specific format is: surname, and the initials of the first name, such as Malcolm Richard Cowley, should be Cowley. magnetic resonance

Extended data:

Paper function

1, showing the level and value of research and improving the research level of researchers;

2. Writing scientific research papers is not only a matter of reflecting scientific research achievements, but also a matter of deepening and developing scientific research achievements. In the process of writing scientific research papers, a large number of materials obtained in the process of experimental research are removed from the rough and refined, and the leap and sublimation from perceptual knowledge to rational knowledge are realized.

3. The process of popularizing experience, exchanging knowledge, and educating and researching is a process in which people gain direct experience. This kind of direct experience gained through careful design and exploration is very valuable not only to the direct participants, but also to all educators and to the improvement and development of the overall understanding of mankind.