-
Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990)
0.01
0.013506081 = product of:
0.027012162 = sum of:
0.027012162 = product of:
0.054024324 = sum of:
0.054024324 = weight(_text_:u in 1816) [ClassicSimilarity], result of:
0.054024324 = score(doc=1816,freq=2.0), product of:
0.14932987 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.045604642 = queryNorm
0.3617784 = fieldWeight in 1816, 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=1816)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Walker, S.: Subject access in online catalogues (1991)
0.01
0.010804865 = product of:
0.02160973 = sum of:
0.02160973 = product of:
0.04321946 = sum of:
0.04321946 = weight(_text_:u in 5690) [ClassicSimilarity], result of:
0.04321946 = score(doc=5690,freq=2.0), product of:
0.14932987 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.045604642 = queryNorm
0.28942272 = fieldWeight in 5690, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.0625 = fieldNorm(doc=5690)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
-
Robertson, S.E.; Walker, S.; Hancock-Beaulieu, M.M.: Large test collection experiments of an operational, interactive system : OKAPI at TREC (1995)
0.01
0.009454256 = product of:
0.018908512 = sum of:
0.018908512 = product of:
0.037817024 = sum of:
0.037817024 = weight(_text_:u in 6964) [ClassicSimilarity], result of:
0.037817024 = score(doc=6964,freq=2.0), product of:
0.14932987 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.045604642 = 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
-
Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992)
0.01
0.009454256 = product of:
0.018908512 = sum of:
0.018908512 = product of:
0.037817024 = sum of:
0.037817024 = weight(_text_:u in 2731) [ClassicSimilarity], result of:
0.037817024 = score(doc=2731,freq=2.0), product of:
0.14932987 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.045604642 = queryNorm
0.25324488 = fieldWeight in 2731, 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=2731)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval