Agata, T.: ¬A measure for evaluating search engines on the World Wide Web : retrieval test with ESL (Expected Search Length) (1997)
0.01
0.005683953 = product of:
0.03978767 = sum of:
0.0100241685 = weight(_text_:information in 3892) [ClassicSimilarity], result of:
0.0100241685 = score(doc=3892,freq=2.0), product of:
0.04306919 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.02453417 = queryNorm
0.23274569 = fieldWeight in 3892, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.09375 = fieldNorm(doc=3892)
0.029763501 = weight(_text_:retrieval in 3892) [ClassicSimilarity], result of:
0.029763501 = score(doc=3892,freq=2.0), product of:
0.07421378 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.02453417 = queryNorm
0.40105087 = fieldWeight in 3892, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.09375 = fieldNorm(doc=3892)
0.14285715 = coord(2/14)
- Source
- Library and information science. 1997, no.37, S.1-11
