-
Sparck Jones, K.; Walker, S.; Robertson, S.E.: ¬A probabilistic model of information retrieval : development and comparative experiments - part 1 (2000)
0.00
5.58136E-4 = product of:
0.0083720395 = sum of:
0.0083720395 = product of:
0.016744079 = sum of:
0.016744079 = weight(_text_:information in 4181) [ClassicSimilarity], result of:
0.016744079 = score(doc=4181,freq=4.0), product of:
0.050870337 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.028978055 = queryNorm
0.3291521 = fieldWeight in 4181, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.09375 = fieldNorm(doc=4181)
0.5 = coord(1/2)
0.06666667 = coord(1/15)
- Source
- Information processing and management. 36(2000) no.6, S.779-808
-
Sparck Jones, K.; Walker, S.; Robertson, S.E.: ¬A probabilistic model of information retrieval : development and comparative experiments - part 2 (2000)
0.00
5.58136E-4 = product of:
0.0083720395 = sum of:
0.0083720395 = product of:
0.016744079 = sum of:
0.016744079 = weight(_text_:information in 4286) [ClassicSimilarity], result of:
0.016744079 = score(doc=4286,freq=4.0), product of:
0.050870337 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.028978055 = queryNorm
0.3291521 = fieldWeight in 4286, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.09375 = fieldNorm(doc=4286)
0.5 = coord(1/2)
0.06666667 = coord(1/15)
- Source
- Information processing and management. 36(2000) no.6, S.809-840
-
Robertson, S.E.; Walker, S.; Beaulieu, M.: Experimentation as a way of life : Okapi at TREC (2000)
0.00
3.9466174E-4 = product of:
0.005919926 = sum of:
0.005919926 = product of:
0.011839852 = sum of:
0.011839852 = weight(_text_:information in 6030) [ClassicSimilarity], result of:
0.011839852 = score(doc=6030,freq=2.0), product of:
0.050870337 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.028978055 = queryNorm
0.23274569 = fieldWeight in 6030, 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=6030)
0.5 = coord(1/2)
0.06666667 = coord(1/15)
- Source
- Information processing and management. 36(2000) no.1, S.95-108
-
Robertson, S.E.; Walker, S.: Some simple effective approximations to the 2-Poisson molde for probabilisitc weighted retrieval (1979)
0.00
3.2888478E-4 = product of:
0.0049332716 = sum of:
0.0049332716 = product of:
0.009866543 = sum of:
0.009866543 = weight(_text_:information in 1940) [ClassicSimilarity], result of:
0.009866543 = score(doc=1940,freq=2.0), product of:
0.050870337 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.028978055 = queryNorm
0.19395474 = fieldWeight in 1940, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.078125 = fieldNorm(doc=1940)
0.5 = coord(1/2)
0.06666667 = coord(1/15)
- 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.; Beaulieu, M.: Laboratory experiments with Okapi : participation in the TREC programme (1997)
0.00
3.255793E-4 = product of:
0.0048836893 = sum of:
0.0048836893 = product of:
0.009767379 = sum of:
0.009767379 = weight(_text_:information in 2216) [ClassicSimilarity], result of:
0.009767379 = score(doc=2216,freq=4.0), product of:
0.050870337 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.028978055 = queryNorm
0.1920054 = fieldWeight in 2216, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0546875 = fieldNorm(doc=2216)
0.5 = coord(1/2)
0.06666667 = coord(1/15)
- Abstract
- Briefly reviews the history of laboratory testing of information retrieval systems, focusing on the idea of a general purpose test collection of documents, queries and relevance judgements. Gives an overview of the methods used in TREC (Text Retrieval Conference) which is concerned with an ideal test collection, and discusses the Okapi team's participation in TREC. Also discusses some of the issues surrounding the difficult problem of interactive evaluation in TREC. The reconciliation of the requirements of the laboratory context with the concerns of interactive retrieval has a long way to go
- Footnote
- Contribution to a thematic issue on Okapi and information retrieval research
-
Robertson, S.E.; Walker, S.; Hancock-Beaulieu, M.M.: Large test collection experiments of an operational, interactive system : OKAPI at TREC (1995)
0.00
2.3021935E-4 = product of:
0.00345329 = sum of:
0.00345329 = product of:
0.00690658 = sum of:
0.00690658 = weight(_text_:information in 6964) [ClassicSimilarity], result of:
0.00690658 = score(doc=6964,freq=2.0), product of:
0.050870337 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.028978055 = queryNorm
0.13576832 = fieldWeight in 6964, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0546875 = fieldNorm(doc=6964)
0.5 = coord(1/2)
0.06666667 = coord(1/15)
- Source
- Information processing and management. 31(1995) no.3, S.345-360
