What do you mean by double checking?

Paper duplication checking is based on text similarity comparison and algorithm analysis. The duplication checking system will search a large number of literature databases for texts similar to papers, so as to quickly identify whether there is plagiarism.

In addition to text similarity comparison, the duplicate checking system will also carry out algorithm analysis and classify papers through specific algorithms. The algorithm will judge whether there is plagiarism or other bad behavior according to the semantic, grammatical and structural information of the paper.

At present, there are many paper duplicate checking systems on the market, such as HowNet, VIP, paperfree, papertime, Wanfang and so on. All these systems can check the duplication of papers, but the results of repeated checking may be different. Therefore, when choosing a paper duplicate checking system, we must choose the same duplicate checking system as the school or institution to ensure the accuracy of duplicate checking results.

Paper duplicate checking system is an auxiliary tool, which can help to find and prevent plagiarism, but it can't completely replace manual checking. At the same time, when writing a thesis, we should also abide by academic norms and moral standards and avoid bad behaviors such as plagiarism.