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)
0.01
0.01315836 = product of:
0.059212618 = sum of:
0.018332949 = weight(_text_:of in 409) [ClassicSimilarity], result of:
0.018332949 = score(doc=409,freq=6.0), product of:
0.061262865 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.03917671 = queryNorm
0.2992506 = fieldWeight in 409, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.078125 = fieldNorm(doc=409)
0.040879667 = weight(_text_:systems in 409) [ClassicSimilarity], result of:
0.040879667 = score(doc=409,freq=2.0), product of:
0.12039685 = queryWeight, product of:
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.03917671 = queryNorm
0.339541 = fieldWeight in 409, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0731742 = idf(docFreq=5561, maxDocs=44218)
0.078125 = fieldNorm(doc=409)
0.22222222 = coord(2/9)
- 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
