1, SCI is the abbreviation of American Science Citation Index, 1957 was founded by institute for scientific information in Philadelphia, USA, and it is 196 1 a citation database created and published by institute for scientific information. It is one of the three world-famous scientific and technological literature retrieval systems, and it is an internationally recognized main retrieval tool for scientific statistics and scientific evaluation, among which SCI is the most important, and its founder is eugene garfield.

2. Journal of Tsinghua University is an academic journal sponsored by the Ministry of Education of People's Republic of China (PRC) and Tsinghua University. Published by Tsinghua University Publishing House, it is divided into natural science edition, philosophy and social science edition and English edition. The natural science edition mainly includes research trends, information science, mechanical engineering, precision instruments and mechanics.