Yongcheng, W.; Xiaoming, G.; Lixia, W.: Automatic indexing on subject of Chinese text (1998)
0.00
7.2068995E-4 = product of:
0.010089659 = sum of:
0.010089659 = weight(_text_:information in 3241) [ClassicSimilarity], result of:
0.010089659 = score(doc=3241,freq=2.0), product of:
0.052020688 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029633347 = queryNorm
0.19395474 = fieldWeight in 3241, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.078125 = fieldNorm(doc=3241)
0.071428575 = coord(1/14)
- Source
- Journal of the China Society for Scientific and Technical Information. 17(1998) no.3, S.219-225