1, HowNet: At present, HowNet is a testing system, with the largest online library and the largest Chinese database, and the most comprehensive collection of Chinese documents, so almost all stereotyped schools use HowNet, but the price is relatively high.
2. VIP: The database of VIP is not as big as HowNet, but the test results are more accurate and the price is affordable. Most of the retraction incidents are due to academic misconduct, multiple submissions, peer review fraud and high repetition rate.
3. Wanfang: The price is not expensive, but the papers in this system are not updated every day, only occasionally. The articles checked on the same day may not be fully compared.
4.paperfree: It has a unique online weighting function, which is very suitable for repeated revision of the first draft. It only charges for the modified words, and the overall testing price is not expensive, and the testing results are relatively strict.
5.PaperPaper, in addition to using HowNet, you can also use PaperPaper to check the copy of the paper. This is a rigorous paper duplicate checking system, with a large number of resource databases, covering 13 comparative knowledge base and more than ten academic literature types, which is more accurate.
A large number of extended materials have been frequently retracted, which has always been a hot topic in the academic publishing industry. In 20 17, springer17 medical papers were withdrawn due to peer review fraud, Piero Anvers of Harvard Medical School was withdrawn due to academic fraud, and Liang Ying, a young Changjiang scholar of Nanjing University, was suspected of academic misconduct. More than 100 papers published before were withdrawn, and even famous journals such as Science and Nature were withdrawn.
The reason for the increase in the number of manuscripts withdrawn may also be that the publishing house began to use software to check plagiarism and repeated publication in 2005, so things that were not easy to find before can now be found out. In the early years, the technology of paper duplication checking was not popularized, and peer reviewers could not guarantee to read published papers in all related disciplines and professional directions, so academic misconduct was inevitable.