First, the detection content is inconsistent.
Usually, when the school conducts a unified duplicate check, it usually requires us to upload the whole document of the paper for testing, so that all the contents in our paper, including the cover, preface, catalogue and thanks, will be included in the duplicate check. Of course, some contents will not be repeated, such as catalogues and references. We can rest assured. However, if only the text content of the copy paper is checked, the result of duplicate checking may change greatly because of the different text in the copy paper.
Secondly, the database of the duplicate checking system has been updated.
You know, no matter which duplicate checking system, their database is constantly updating and expanding new content. Therefore, if the time interval between two repeated inspections is long, it is normal that the test results are different. What we can do is to check whether the repetition rate of the paper meets the requirements of the school, and modify the marked repetition content and the repetition rate of the paper in time, so that the chances of passing the school inspection will be greater.
Third, the paper duplicate checking system is different.
Different paper duplicate checking systems contain different comparison data and algorithms. Therefore, if we choose a different detection system when we check and repeat from school, the results of detecting and repeating will naturally be different.