1, citations are not marked: A simple understanding is that the paper duplicate checking system will automatically detect the cited parts when checking duplicates, which also requires you to mark the cited documents. If the cited documents are not marked, the duplicate checking system will not detect the citation rate, of course, the duplicate checking of the paper will quote 0.
2. The source of the cited documents is not in the database: when the cited documents are not in the database of the paper duplicate checking system used by everyone, the duplicate checking system cannot detect the citation rate.
3. The citation content is too short: the citation content is too short, and the paper duplicate checking system cannot match the citation content, and the citation rate will be 0.
4. The quoted content is modified: if the quoted text content is modified, then the quoted content cannot match the literature source of the paper duplicate checking system, and naturally the cited rate cannot be detected.
5. Incorrect citation format: If the citation format of the cited documents is not standardized, the paper detection system may calculate the repetition rate of the cited documents in red, and will not detect the citation rate at this time.
Basically, everyone will quote literature to a certain extent when writing papers, and papers with zero citation rate basically do not exist, so it is definitely impossible for papers with zero citation rate to pass the examination of colleges or periodical institutions. Colleges and periodical institutions will also pay attention to papers with zero citation rate and re-examine the reasons.
The paper duplicate checking system can only detect the cited documents collected by itself, so when the contents of the original cited documents have been modified, these cited contents will not be judged as cited contents during the content review, and the citation rate is likely to be zero.
Papers with repeated citations and too short citations can't be recognized by the paper duplicate checking system, so when the citation rate of a paper is zero, it may also be because there are too few citations, which is why users should review it when the citation rate is zero.
Only papers with correct citation format will be recognized by the paper duplication checking system, which is considered as the repeated citation rate of the cited content. Therefore, when the citation format is incorrect, it means that there is no citation content in the paper, so there will be no citation rate.