VIP and HowNet are two commonly used paper duplicate checking systems, which are developed by different institutions respectively. Although they have similarities in detection principles and algorithms, their databases and comparison ranges are different, so their detection results may be different.
In addition, different schools or periodicals have different requirements for paper duplicate checking rate. Generally speaking, schools or periodicals will determine the specific requirements of duplicate checking rate according to the types of papers, research fields, publishing requirements and other factors. Therefore, even if the duplicate checking rate of Daya is low, if the repetition rate detected by VIP is higher than the requirements of schools or journals, the paper may still be rejected.
Paperfree and papertime are auxiliary revision references, which provide free weight checking, machine weight reduction, online revision and other functions, covering about 70% of the data of HowNet, which can reduce the absolute cost of the previous inspection fee. If accurate duplicate checking results are needed, it is recommended to use the duplicate checking system designated by the school or institution for testing.