-
Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983)
0.00
0.0018496371 = product of:
0.027744556 = sum of:
0.027744556 = product of:
0.05548911 = sum of:
0.05548911 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
0.05548911 = score(doc=2134,freq=2.0), product of:
0.10244239 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.029253962 = queryNorm
0.5416616 = fieldWeight in 2134, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=2134)
0.5 = coord(1/2)
0.06666667 = coord(1/15)
- Date
- 30. 3.2001 13:32:22
-
Salton, G.; Rijsbergen, C.J. van; Maron, M.E.: Panel on key issues in information retrieval (1983)
0.00
6.5061613E-4 = product of:
0.009759242 = sum of:
0.009759242 = product of:
0.019518483 = sum of:
0.019518483 = weight(_text_:information in 7410) [ClassicSimilarity], result of:
0.019518483 = score(doc=7410,freq=12.0), product of:
0.051354684 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029253962 = queryNorm
0.38007212 = fieldWeight in 7410, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.0625 = fieldNorm(doc=7410)
0.5 = coord(1/2)
0.06666667 = coord(1/15)
- Abstract
- Contribution to an issue devoted to the 6th Annual International Conference of the Special Interest Group on Information Retrieval of the Association for Computing Machinery (USA) held at the National Library of Medicine, Bethesda, Maryland, from 6-8 June 83. The following papers were presented in session 12 which was a panel on key issues in information retrieval: SALTON, G.: Research problems in automatic information retrieval; RIJSBERGEN, C.J. van: Information retrieval: new directions, old solutions; MARON, M.E.: Open problems in information retrieval
-
Rijsbergen, C.J. van: ¬A non-classical logic for information retrieval (1986)
0.00
5.634501E-4 = product of:
0.008451751 = sum of:
0.008451751 = product of:
0.016903503 = sum of:
0.016903503 = weight(_text_:information in 1933) [ClassicSimilarity], result of:
0.016903503 = score(doc=1933,freq=4.0), product of:
0.051354684 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029253962 = queryNorm
0.3291521 = fieldWeight in 1933, 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=1933)
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.268-272.
-
Rijsbergen, C.J. van: Retrieval effectiveness (1981)
0.00
5.312259E-4 = product of:
0.007968388 = sum of:
0.007968388 = product of:
0.015936775 = sum of:
0.015936775 = weight(_text_:information in 3147) [ClassicSimilarity], result of:
0.015936775 = score(doc=3147,freq=2.0), product of:
0.051354684 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.029253962 = queryNorm
0.3103276 = fieldWeight in 3147, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.125 = fieldNorm(doc=3147)
0.5 = coord(1/2)
0.06666667 = coord(1/15)
- Source
- Information retrieval experiment. Ed.: K. Sparck Jones