1. Use duplicate checking software: At present, there are many professional duplicate checking software on the market, such as Turnitin and HowNet. These softwares can compare the full text of the paper and detect the repetition and plagiarism in the paper. The advantage of using duplicate checking software is that the result is accurate, but it needs to be paid.

2. Use online duplicate checking tools: There are many free online duplicate checking tools on the Internet, such as PaperPass and Grammarly. These tools can check part of the paper, but the test results may not be as accurate as professional duplicate checking software.

3. Manual duplicate checking: Manual duplicate checking refers to the author reading the paper himself to check whether there is duplication or plagiarism. Although this method is simple, it is time-consuming and laborious, and it is easy to miss the inspection.

4. Tutor or peer review: Before submitting a paper, you can give it to a tutor or peer review. They can help check whether there is repetition or plagiarism in the paper and make suggestions for revision. This method can improve the quality of papers, but it needs to find reliable reviewers.

5. Internal duplicate checking in schools or laboratories: Some schools or laboratories will provide internal duplicate checking services, and students can submit their papers to relevant departments for duplicate checking before submitting them. This method can ensure that the paper meets the requirements of the school or laboratory, but it may need to wait in line.

In short, there are many ways to check the duplicate of graduate papers, and you can choose the appropriate method according to your own needs and conditions. No matter which method is adopted, we should pay attention to the originality and academic ethics of the paper and avoid plagiarism.