Voorhees, E.M.: Question answering in TREC (2005)
0.01
0.0072988793 = product of:
0.05109215 = sum of:
0.05109215 = weight(_text_:u in 6487) [ClassicSimilarity], result of:
0.05109215 = score(doc=6487,freq=2.0), product of:
0.1176875 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.035941213 = queryNorm
0.43413407 = fieldWeight in 6487, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.09375 = fieldNorm(doc=6487)
0.14285715 = coord(1/7)
- Source
- TREC: experiment and evaluation in information retrieval. Ed.: E.M. Voorhees, u. D.K. Harman