Scientific Citation Index (SCI) is a citation database established by eugene garfield of institute for scientific information (ISI) in Philadelphia, USA on 1957.
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.
Scientific citation index is based on Bradford's literature dispersion theory and E. Garfield's citation analysis theory. It evaluates and studies academic journals and scientific research achievements in many aspects by counting the cited frequency of papers, so as to judge the performance of scientific research output of a country or region, scientific research units and individuals and reflect its international academic level.
Therefore, SCI is an internationally recognized scientific and technological literature retrieval tool worthy of reference.
With its unique citation approach and comprehensive scientific data, scientific citation index ranks journals and papers through the statistics of a large number of citations, and then obtains quantitative indicators such as impact factors, citation frequency and real-time index of a journal and paper in a certain discipline. The high frequency of citation shows that this paper has a great influence in its research field and has attracted the attention of international peers with high academic level.
Because the papers included in SCI are mainly in the basic research field of natural science, SCI indicators are mainly suitable for evaluating the achievements of basic research, and the main achievements of basic research are academic papers. Therefore, how to evaluate the basic research results is often simplified as how to evaluate the influence of the contents contained in the paper on the progress of scientific knowledge.
Scientific citation index is one of the most famous retrieval publications in the world, and it is also an important tool of bibliometrics and scientometrics. Through the citation retrieval function, you can find the early, then and recent academic documents of related research topics, and at the same time get the abstracts of papers; You can see the records of cited references, the cited situation and the records of related documents.
In the past 50 years, SCI database has developed continuously, and has become the most important large-scale database in the contemporary world, ranking first among the six famous international retrieval systems. In addition, with ISI, Social Science Citation Index (SSCI) and Art and Humanities Citation Index (A & amp； HCI).
It is not only an important retrieval reference book, but also an important basis for evaluating scientific research achievements. It has become the most authoritative and important evaluation system of basic research and applied basic research achievements in the world. It is one of the important indicators to evaluate the academic level of a country, a scientific research institution, an institution of higher learning, a journal and even a researcher.
The periodicals collected by SCI mainly involve basic scientific research fields such as mathematics, science, chemistry, agriculture, forestry, medicine and biology. The selected journals come from more than 40 countries with more than 50 languages, among which the main countries are the United States, Britain, the Netherlands, Germany, Russia, France, Japan and Canada, and some China (including Hong Kong, Macao and Taiwan) journals are also included.