The American Science Citation Index (SCI) was founded by the institute for scientific information in Philadelphia in 1957, and it is a citation database created and published by institute for scientific information (ISI)1961+0.

SCI (scientific citation index), EI (engineering index? ), ISTP (index of scientific and technological conference proceedings? ) is one of the three world-famous scientific and technological literature retrieval systems, and is an internationally recognized main retrieval tool for scientific statistics and scientific evaluation, among which SCI is the most important.

The Social Science Citation Index (SSCI), a partner of SCI, was also founded by institute for scientific information. It is a large-scale retrieval tool and can be used to analyze the number of social science papers in different countries and regions.

China Science Citation Database (CSCD). Founded in 1989, it contains more than 1,000 Chinese and English scientific and technological core journals and excellent journals published in the fields of mathematics, physics, chemistry, astronomy, geoscience, biology, agriculture and forestry, medicine and health, engineering technology and environmental science.

Up to now, 37 1429 1 papers and 38,942,322 citations have been accumulated from 1989. Chinese scientific citation database has the characteristics of the oldest history, strong professionalism, accurate and standardized data, diverse retrieval methods, completeness and convenience. Since it was provided for use, it has been well received by users and is known as "SCI of China".

Extended data:

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.

Baidu encyclopedia-scientific citation index