Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992)
0.00
0.003598199 = product of:
0.014392796 = sum of:
0.014392796 = product of:
0.028785592 = sum of:
0.028785592 = weight(_text_:online in 2731) [ClassicSimilarity], result of:
0.028785592 = score(doc=2731,freq=2.0), product of:
0.1226387 = queryWeight, product of:
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.040409453 = queryNorm
0.23471867 = fieldWeight in 2731, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.0349014 = idf(docFreq=5778, maxDocs=44218)
0.0546875 = fieldNorm(doc=2731)
0.5 = coord(1/2)
0.25 = coord(1/4)