-
Beaulieu, M.M.; Gatford, M.; Huang, X.; Robertson, S.E.; Walker, S.; Williams, P.: Okapi an TREC-5 (1997)
0.02
0.01801507 = product of:
0.03603014 = sum of:
0.03603014 = product of:
0.07206028 = sum of:
0.07206028 = weight(_text_:u in 3097) [ClassicSimilarity], result of:
0.07206028 = score(doc=3097,freq=2.0), product of:
0.16598624 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.050691422 = queryNorm
0.43413407 = fieldWeight in 3097, 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=3097)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- The Fifth Text Retrieval Conference (TREC-5). Ed.: E.M. Voorhees u. D.K. Harman
-
Robertson, S.E.; Walker, S.: Some simple effective approximations to the 2-Poisson molde for probabilisitc weighted retrieval (1979)
0.02
0.0150125595 = product of:
0.030025119 = sum of:
0.030025119 = product of:
0.060050238 = sum of:
0.060050238 = weight(_text_:u in 1940) [ClassicSimilarity], result of:
0.060050238 = score(doc=1940,freq=2.0), product of:
0.16598624 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.050691422 = queryNorm
0.3617784 = fieldWeight in 1940, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.078125 = fieldNorm(doc=1940)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Footnote
- Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.345-453.
-
Robertson, S.E.; Walker, S.; Hancock-Beaulieu, M.M.: Large test collection experiments of an operational, interactive system : OKAPI at TREC (1995)
0.01
0.010508792 = product of:
0.021017583 = sum of:
0.021017583 = product of:
0.042035166 = sum of:
0.042035166 = weight(_text_:u in 6964) [ClassicSimilarity], result of:
0.042035166 = score(doc=6964,freq=2.0), product of:
0.16598624 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.050691422 = queryNorm
0.25324488 = fieldWeight in 6964, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.0546875 = fieldNorm(doc=6964)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval