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.
SCI SCI (Science Citation Index) is a world-famous periodical literature retrieval tool published by institute for scientific information (ISI).
Its publishing forms include printed periodicals, CD-ROM versions and online databases, and now the online version of the database on the Internet has been published. SCI contains about 3,500 core journals published all over the world in the fields of mathematics, science, chemistry, agriculture, forestry, medicine, life sciences, astronomy, geography, environment, materials and engineering technology.
EIEi Compendex is the earliest source of engineering abstracts in the world. The index information of 500,000 abstracts added to Ei Compendex database every year comes from 565,438+000 engineering journals, conference collections and technical reports.
The documents collected by Ei Compendex cover all engineering fields, of which about 22% are conference documents and 90% are in English. Ei Company began to collect China periodicals from 1992. 1998 Ei Set up Ei China Mirror Station in Tsinghua University Library.