China HowNet is often used for duplicate checking of papers. The reason why the repetition rate of papers is getting higher and higher is mainly due to two aspects:

First, the duplicate checking system of HowNet is a machine test, and the system analyzes the similarity according to the semantics of sentence groups, rather than simply considering it as repetition. The same paper is still the same in school, but if it is changed, the content will change before and after, so it is likely that the revised part of the topic is ineffective, but the repeated content will be "increased" because of the structural changes of the paper.

Secondly, the duplicate checking algorithm and database of HowNet system are also updated at any time. It will also lead to the appearance of new duplicate contents, which will lead to the difference between the two repeated inspections and increase the repetition rate.

Knowing the reason, we can avoid the situation that the repetition rate is getting higher and higher when revising. For example:

First, in the process of revising the paper, we must choose the duplicate checking system of HowNet through formal channels.

Two, choose the duplicate checking system and version consistent with the school, and submit the content and format of the paper consistent with the school (including the file version).