Cheng, K.-H.: Automatic identification for topics of electronic documents (1997)
0.02
0.018182784 = product of:
0.03636557 = sum of:
0.03636557 = product of:
0.07273114 = sum of:
0.07273114 = weight(_text_:1997 in 1811) [ClassicSimilarity], result of:
0.07273114 = score(doc=1811,freq=5.0), product of:
0.1637463 = queryWeight, product of:
3.6322508 = idf(docFreq=3179, maxDocs=44218)
0.04508122 = queryNorm
0.44416967 = fieldWeight in 1811, product of:
2.236068 = tf(freq=5.0), with freq of:
5.0 = termFreq=5.0
3.6322508 = idf(docFreq=3179, maxDocs=44218)
0.0546875 = fieldNorm(doc=1811)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Bulletin of the Library Association of China. 1997, no.59, Dec., S.43-58
- Year
- 1997
