Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992)
0.01
0.007451397 = product of:
0.014902794 = sum of:
0.014902794 = product of:
0.029805588 = sum of:
0.029805588 = weight(_text_:4 in 2731) [ClassicSimilarity], result of:
0.029805588 = score(doc=2731,freq=2.0), product of:
0.14201462 = queryWeight, product of:
2.7136984 = idf(docFreq=7967, maxDocs=44218)
0.0523325 = queryNorm
0.2098769 = fieldWeight in 2731, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.7136984 = idf(docFreq=7967, maxDocs=44218)
0.0546875 = fieldNorm(doc=2731)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Journal of documentation. 48(1992) no.4, S.406-421