Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983)
0.07
0.0690759 = product of:
0.11512649 = sum of:
0.06844203 = weight(_text_:u in 2134) [ClassicSimilarity], result of:
0.06844203 = score(doc=2134,freq=2.0), product of:
0.13513014 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.04126811 = 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)
0.007545648 = weight(_text_:s in 2134) [ClassicSimilarity], result of:
0.007545648 = score(doc=2134,freq=2.0), product of:
0.044868242 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04126811 = queryNorm
0.16817348 = fieldWeight in 2134, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.109375 = fieldNorm(doc=2134)
0.039138813 = product of:
0.078277625 = sum of:
0.078277625 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
0.078277625 = score(doc=2134,freq=2.0), product of:
0.14451389 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04126811 = 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)
0.6 = coord(3/5)
- Date
- 30. 3.2001 13:32:22
- Source
- Computer journal. 26(1983), S.239-246
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval
Robertson, S.E.: On relevance weight estimation and query expansion (1986)
0.02
0.021710766 = product of:
0.054276917 = sum of:
0.048887167 = weight(_text_:u in 3875) [ClassicSimilarity], result of:
0.048887167 = score(doc=3875,freq=2.0), product of:
0.13513014 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.04126811 = 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)
0.005389749 = weight(_text_:s in 3875) [ClassicSimilarity], result of:
0.005389749 = score(doc=3875,freq=2.0), product of:
0.044868242 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.04126811 = queryNorm
0.120123915 = fieldWeight in 3875, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.078125 = fieldNorm(doc=3875)
0.4 = coord(2/5)
- Source
- Journal of documentation. 42(1986), S.182-188
- Theme
- Semantisches Umfeld in Indexierung u. Retrieval