Paper duplicate checking refers to the process of detecting papers through duplicate checking system and checking whether there is duplication or plagiarism in the papers. In general, the system will compare the text content of the paper with the documents in the database to calculate the duplicate checking rate of the paper. Duplicate checking rate refers to the proportion of repeated content in a paper, usually expressed as a percentage.

Different duplicate checking systems may have different duplicate checking standards and algorithms, so the duplicate checking results of different systems may be different. At the same time, different schools or institutions may have different criteria for summarizing the importance of duplicate checking, so it is necessary to choose the appropriate duplicate checking system and institution according to the specific situation.