Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983)
0.04
0.043000612 = product of:
0.086001225 = sum of:
0.010528875 = weight(_text_:e in 2134) [ClassicSimilarity], result of:
0.010528875 = score(doc=2134,freq=2.0), product of:
0.047356583 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.03294669 = queryNorm
0.2223318 = fieldWeight in 2134, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.109375 = fieldNorm(doc=2134)
0.05464118 = weight(_text_:u in 2134) [ClassicSimilarity], result of:
0.05464118 = score(doc=2134,freq=2.0), product of:
0.107882105 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.03294669 = queryNorm
0.50648975 = fieldWeight in 2134, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.109375 = fieldNorm(doc=2134)
0.02083117 = product of:
0.062493507 = sum of:
0.062493507 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
0.062493507 = score(doc=2134,freq=2.0), product of:
0.1153737 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03294669 = 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)
0.33333334 = coord(1/3)
0.5 = coord(3/6)
- Date
- 30. 3.2001 13:32:22
- Language
- e
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
Robertson, S.E.: On relevance weight estimation and query expansion (1986)
0.02
0.01551668 = product of:
0.04655004 = sum of:
0.007520625 = weight(_text_:e in 3875) [ClassicSimilarity], result of:
0.007520625 = score(doc=3875,freq=2.0), product of:
0.047356583 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.03294669 = queryNorm
0.15880844 = fieldWeight in 3875, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.078125 = fieldNorm(doc=3875)
0.039029416 = weight(_text_:u in 3875) [ClassicSimilarity], result of:
0.039029416 = score(doc=3875,freq=2.0), product of:
0.107882105 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.03294669 = queryNorm
0.3617784 = fieldWeight in 3875, 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=3875)
0.33333334 = coord(2/6)
- Language
- e
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval