The American Science Citation Index (SCI) was founded in 1957 by institute for scientific information, Philadelphia, USA. Is a citation database created and published by institute for scientific information (ISI)1961+0. SCIEI and ISTP are three world-famous retrieval systems of scientific and technological documents, and they are internationally recognized as the main retrieval tools for scientific statistics and scientific evaluation, among which SCI is the most important.
SCi has the largest proportion of life sciences, medicine, chemistry and physics, and its scope is the important international journals of that year. In particular, its citation index shows unique scientific reference value and occupies an important position in academic circles. Many countries and regions regard the papers collected and cited by SCI as an important index to evaluate academic level.
Extended data:
SCI is published six times a year, and now there are six volumes of A, B, C, D, E and F in each issue. SCI citation index consists of four parts: author citation index, group author citation index, anonymous citation index and patent citation index;
1, the author citation index, arranged by the author's surname and first name, can find out the citation of an author's literature. We can find out who has cited an author's article and how many people have cited several articles, and count the frequency of each article, which can be used to evaluate the academic level of researchers and the quality of an article.
2. 1996 The second issue of the "Citation Index of Group Authors" is added, which takes the name of the first group organization of cited documents collected in the current period as the retrieval object, and provides information on when and where the articles published by this organization were cited by the names of known organizations.
3. Anonymous reference index? Some documents, such as editorial articles, comments, corrections, newsletters, meeting documents, etc. , can also be cited as quotations. Because there is no author's name, these cited documents are compiled into anonymous citation index. According to the alphabetical order of the cited publications, the publications with the same name are arranged according to the publication year and volume number.
4, patent citation index, if the citation is a patent document, it is included in the patent author citation index. The index is arranged according to the number of patent numbers, and it is used to find the literature citing a patent and understand the new application and improvement of the patent. At the same time, we can know the number of times the patent is cited, so as to evaluate the value of the patent.
Baidu encyclopedia-scientific citation index