Robertson, S.E.: OKAPI at TREC-1 (1994)
0.01
0.012573673 = product of:
0.03772102 = sum of:
0.03772102 = weight(_text_:on in 7953) [ClassicSimilarity], result of:
0.03772102 = score(doc=7953,freq=4.0), product of:
0.109763056 = queryWeight, product of:
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.04990557 = queryNorm
0.3436586 = fieldWeight in 7953, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.199415 = idf(docFreq=13325, maxDocs=44218)
0.078125 = fieldNorm(doc=7953)
0.33333334 = coord(1/3)
- Abstract
- Describes the work carried out on the TREC-2 project following the results of the TREC-1 project. Experiments were conducted on the OKAPI experimental text information retrieval system which investigated a number of alternative probabilistic term weighting functions in place of the 'standard' Robertson Sparck Jones weighting functions used in TREC-1