Different schools have different standards and principles for paper duplicate checking. Usually, the duplicate checking standard of undergraduate thesis is below 30%. The duplicate checking standard for master's thesis is15%-20%; The principles of paper inspection usually include safety principle, practical principles principle and modification principle.

Each institution has different requirements for the standards and principles of paper duplicate checking. Generally speaking, every paper has room for repetition. After all, the technical terms in each paper are irreplaceable and modifiable. In the process of duplicate checking, such technical terms will also be marked in red. At the present stage, the duplicate checking standard of most undergraduate papers is below 30%; The duplicate checking standard for master's thesis is15%-20%; The difficulty system of doctoral thesis is relatively high, less than 5%, that is to say, except for some professional words without originality, other contents are basically completed by themselves.

The calculation rule used in the paper duplicate checking system of HowNet is a fuzzy calculation method, which is one of the more advanced calculation methods at present. If the structure or overall outline of the paper is disturbed, it will cause the same article to be tested in red for the first time and the second time, or the part that is not marked in red for the first time and checked in red for the second time. HowNet's duplicate checking system is based on sentences, that is, if more than thirteen words are repeated in a sentence, it will be regarded as plagiarism, or if the quoted content reaches the threshold set by the duplicate checking system, it will also be regarded as plagiarism. It is necessary for students to modify the standard in red font.

The principle of paper inspection is usually as follows:

1, safety principle. Many schools have their own paper detection system, but you don't have to open individual users. If you insist on using the same testing and school system, it will be recorded, and it will be very risky to check the duplicate through unknown websites. If it can be uploaded to the Internet, then our subsequent duplicate checking rate will definitely be 100%.

2. Practical principles. Many people think that we will use any test that the school uses in advance. As we all know, a good system test is only aimed at the last repetition rate figure, and its duplicate checking report is not convenient to modify at all. You don't even know what caused the repetition.

3. Revise the principle. The revision of the paper is nothing more than synonyms, synonyms. Because it is possible to save the whole sentence by replacing the words that cause repetition in a sentence. This is the fastest modification method.