Buckley, C.; Voorhees, E.M.: Retrieval system evaluation (2005)
0.02
0.021017583 = product of:
0.042035166 = sum of:
0.042035166 = product of:
0.08407033 = sum of:
0.08407033 = weight(_text_:u in 648) [ClassicSimilarity], result of:
0.08407033 = score(doc=648,freq=2.0), product of:
0.16598624 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.050691422 = queryNorm
0.50648975 = fieldWeight in 648, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.109375 = fieldNorm(doc=648)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- TREC: experiment and evaluation in information retrieval. Ed.: E.M. Voorhees, u. D.K. Harman