In academic research, citation and plagiarism are two interrelated but essentially different concepts. Citation refers to referring to and quoting opinions, experimental data and conclusions from other published papers or works when writing academic papers. The purpose of quoting is to support your own argument, show the foothold of the research and respect the previous research. By quoting the views of other scholars, the credibility and academic value of the research can be increased.

However, plagiarism refers to directly copying other people's words and opinions or imitating other people's research without permission and without indicating the source, and publishing it in its own name. Plagiarism is an academic misconduct, which not only infringes on intellectual property rights, but also seriously damages the reputation and academic trust of the academic community. Therefore, it is very important to pay attention to the detection of plagiarism for paper retrieval.

In order to deal with plagiarism, many universities and journals will introduce duplicate checking system to help identify plagiarism in papers. By comparing the paper with the documents in the existing database, the duplicate checking system detects the parts similar to other documents, and then provides the corresponding reports and analysis results. Based on text matching and comparison algorithms, these systems can effectively detect possible plagiarism in papers.

In recent years, with the progress of technology, the duplicate checking system is constantly optimized and improved. In addition to text comparison, some advanced duplicate checking systems also use techniques such as image comparison and semantic analysis to increase the accuracy and reliability of duplicate checking. The application of these systems not only helps the academic circles to find and punish plagiarism in time, but also lays a solid foundation for ensuring academic integrity.