Efremenkova, V.M.; Kamenskaya, M.A.; Khutoretskii, V.M.: Sootnoshenien klassifikasionnykh sistem bazy dannykh Chemical Abstracts i sootvetstvuyushchikh ei chastei sistemy baz dannykh VINITI (1999)
0.02
0.015224343 = product of:
0.045673028 = sum of:
0.045673028 = product of:
0.091346055 = sum of:
0.091346055 = weight(_text_:database in 409) [ClassicSimilarity], result of:
0.091346055 = score(doc=409,freq=2.0), product of:
0.20452234 = queryWeight, product of:
4.042444 = idf(docFreq=2109, maxDocs=44218)
0.050593734 = queryNorm
0.4466312 = fieldWeight in 409, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.042444 = idf(docFreq=2109, maxDocs=44218)
0.078125 = fieldNorm(doc=409)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Footnote
- Übers. des Titels: Comparison of classification systems used by Chemical Abstracts and by the All-Russian Institute of Scientific and Technical Information in the corresponding section of the VINITI database
