Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992)
0.00
0.0012189177 = product of:
0.0024378353 = sum of:
0.0024378353 = product of:
0.0048756707 = sum of:
0.0048756707 = weight(_text_:s in 2731) [ClassicSimilarity], result of:
0.0048756707 = score(doc=2731,freq=4.0), product of:
0.04100075 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.03771094 = queryNorm
0.118916616 = fieldWeight in 2731, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, 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