Blind evaluation of a paper means that the reviewer does not know who the author of the paper is. The blind evaluation system is to send dissertations without the author's name to experts who can't know the author for evaluation. Such a score should be the most objective.
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Usually, colleges and universities, especially graduate schools, have relevant regulations on blind inspection of dissertations on a regular basis, and most of them randomly select a certain number of theses for blind inspection.
The external audit will send the documents to experts from other units for review. Some schools are managed by degree offices, while others are guided by tutors. 90% of the experts appointed by the tutor submit papers for review, and they can only pass because of the good relationship between the experts and the tutor.
Baidu encyclopedia-blind review of papers