International ranking of papers and periodicals

Foreign papers and periodicals: SCI, EI, ISTP, SSCI, INSPEC, SCIE, IEEE.

SCI (Science Citation Index), EI (Engineering Index) and ISTP (Science and Technology Conference Index) are three world-famous retrieval systems for scientific documents, which are internationally recognized as the main retrieval tools for scientific statistics and scientific evaluation, among which SCI is the most important.

Among the three retrieval systems ISTP, EI and SCI, SCI can best reflect the research level and paper quality of basic disciplines. The retrieval system contains more comprehensive sci-tech periodicals, which can be said to be the essence of high-quality excellent papers in various disciplines. This retrieval system has always been the center and focus of the world's scientific and technological circles. ISTP and EI retrieval systems are relatively loose in evaluating the quality standards of scientific papers and periodicals.