-
Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983)
0.10
0.0988731 = product of:
0.2966193 = sum of:
0.2966193 = sum of:
0.21273349 = weight(_text_:van in 2134) [ClassicSimilarity], result of:
0.21273349 = score(doc=2134,freq=2.0), product of:
0.24662332 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.044224758 = queryNorm
0.86258465 = fieldWeight in 2134, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.109375 = fieldNorm(doc=2134)
0.08388581 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
0.08388581 = score(doc=2134,freq=2.0), product of:
0.15486756 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044224758 = 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)
- Date
- 30. 3.2001 13:32:22
-
Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000)
0.07
0.0740064 = product of:
0.1110096 = sum of:
0.069066696 = weight(_text_:j in 3445) [ClassicSimilarity], result of:
0.069066696 = score(doc=3445,freq=2.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.4914939 = fieldWeight in 3445, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.109375 = fieldNorm(doc=3445)
0.041942906 = product of:
0.08388581 = sum of:
0.08388581 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
0.08388581 = score(doc=3445,freq=2.0), product of:
0.15486756 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044224758 = queryNorm
0.5416616 = fieldWeight in 3445, 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=3445)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Date
- 25. 8.2005 17:42:22
-
Crestani, F.; Dominich, S.; Lalmas, M.; Rijsbergen, C.J.K. van: Mathematical, logical, and formal methods in information retrieval : an introduction to the special issue (2003)
0.04
0.04237419 = product of:
0.12712257 = sum of:
0.12712257 = sum of:
0.0911715 = weight(_text_:van in 1451) [ClassicSimilarity], result of:
0.0911715 = score(doc=1451,freq=2.0), product of:
0.24662332 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.044224758 = queryNorm
0.36967915 = fieldWeight in 1451, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.046875 = fieldNorm(doc=1451)
0.035951063 = weight(_text_:22 in 1451) [ClassicSimilarity], result of:
0.035951063 = score(doc=1451,freq=2.0), product of:
0.15486756 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044224758 = queryNorm
0.23214069 = fieldWeight in 1451, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=1451)
0.33333334 = coord(1/3)
- Date
- 22. 3.2003 19:27:36
-
Wiggers, G.; Verberne, S.; Loon, W. van; Zwenne, G.-J.: Bibliometric-enhanced legal information retrieval : combining usage and citations as flavors of impact relevance (2023)
0.04
0.04176987 = product of:
0.0626548 = sum of:
0.024666676 = weight(_text_:j in 1022) [ClassicSimilarity], result of:
0.024666676 = score(doc=1022,freq=2.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.17553353 = fieldWeight in 1022, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=1022)
0.037988123 = product of:
0.075976245 = sum of:
0.075976245 = weight(_text_:van in 1022) [ClassicSimilarity], result of:
0.075976245 = score(doc=1022,freq=2.0), product of:
0.24662332 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.044224758 = queryNorm
0.30806595 = fieldWeight in 1022, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.0390625 = fieldNorm(doc=1022)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
-
Rijsbergen, C.J. van: ¬A fast hierarchic clustering algorithm (1970)
0.04
0.040520668 = product of:
0.121562 = sum of:
0.121562 = product of:
0.243124 = sum of:
0.243124 = weight(_text_:van in 3300) [ClassicSimilarity], result of:
0.243124 = score(doc=3300,freq=2.0), product of:
0.24662332 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.044224758 = queryNorm
0.98581105 = fieldWeight in 3300, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.125 = fieldNorm(doc=3300)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
-
Furner, J.: ¬A unifying model of document relatedness for hybrid search engines (2003)
0.03
0.031717032 = product of:
0.047575545 = sum of:
0.029600013 = weight(_text_:j in 2717) [ClassicSimilarity], result of:
0.029600013 = score(doc=2717,freq=2.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.21064025 = fieldWeight in 2717, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2717)
0.017975532 = product of:
0.035951063 = sum of:
0.035951063 = weight(_text_:22 in 2717) [ClassicSimilarity], result of:
0.035951063 = score(doc=2717,freq=2.0), product of:
0.15486756 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044224758 = queryNorm
0.23214069 = fieldWeight in 2717, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=2717)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Date
- 11. 9.2004 17:32:22
-
Daniowicz, C.; Baliski, J.: Document ranking based upon Markov chains (2001)
0.02
0.023022233 = product of:
0.069066696 = sum of:
0.069066696 = weight(_text_:j in 5388) [ClassicSimilarity], result of:
0.069066696 = score(doc=5388,freq=2.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.4914939 = fieldWeight in 5388, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.109375 = fieldNorm(doc=5388)
0.33333334 = coord(1/3)
-
Van der Veer Martens, B.; Fleet, C. van: Opening the black box of "relevance work" : a domain analysis (2012)
0.02
0.02148933 = product of:
0.06446799 = sum of:
0.06446799 = product of:
0.12893598 = sum of:
0.12893598 = weight(_text_:van in 247) [ClassicSimilarity], result of:
0.12893598 = score(doc=247,freq=4.0), product of:
0.24662332 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.044224758 = queryNorm
0.5228053 = fieldWeight in 247, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.046875 = fieldNorm(doc=247)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
-
Sembok, T.M.T.; Rijsbergen, C.J. van: IMAGING: a relevant feedback retrieval with nearest neighbour clusters (1994)
0.02
0.020260334 = product of:
0.060781 = sum of:
0.060781 = product of:
0.121562 = sum of:
0.121562 = weight(_text_:van in 1071) [ClassicSimilarity], result of:
0.121562 = score(doc=1071,freq=2.0), product of:
0.24662332 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.044224758 = queryNorm
0.49290553 = fieldWeight in 1071, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.0625 = fieldNorm(doc=1071)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
-
Savoy, J.; Ndarugendamwo, M.; Vrajitoru, D.: Report on the TREC-4 experiment : combining probabilistic and vector-space schemes (1996)
0.02
0.019733343 = product of:
0.059200026 = sum of:
0.059200026 = weight(_text_:j in 7574) [ClassicSimilarity], result of:
0.059200026 = score(doc=7574,freq=2.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.4212805 = fieldWeight in 7574, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.09375 = fieldNorm(doc=7574)
0.33333334 = coord(1/3)
-
Belkin, N.J.; Cool, C.; Koenemann, J.; Ng, K.B.; Park, S.: Using relevance feedback and ranking in interactive searching (1996)
0.02
0.019733343 = product of:
0.059200026 = sum of:
0.059200026 = weight(_text_:j in 7588) [ClassicSimilarity], result of:
0.059200026 = score(doc=7588,freq=2.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.4212805 = fieldWeight in 7588, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.09375 = fieldNorm(doc=7588)
0.33333334 = coord(1/3)
-
Bar-Ilan, J.; Levene, M.: ¬The hw-rank : an h-index variant for ranking web pages (2015)
0.02
0.016444452 = product of:
0.049333353 = sum of:
0.049333353 = weight(_text_:j in 1694) [ClassicSimilarity], result of:
0.049333353 = score(doc=1694,freq=2.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.35106707 = fieldWeight in 1694, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.078125 = fieldNorm(doc=1694)
0.33333334 = coord(1/3)
-
Karlsson, A.; Hammarfelt, B.; Steinhauer, H.J.; Falkman, G.; Olson, N.; Nelhans, G.; Nolin, J.: Modeling uncertainty in bibliometrics and information retrieval : an information fusion approach (2015)
0.02
0.016444452 = product of:
0.049333353 = sum of:
0.049333353 = weight(_text_:j in 1696) [ClassicSimilarity], result of:
0.049333353 = score(doc=1696,freq=2.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.35106707 = fieldWeight in 1696, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.078125 = fieldNorm(doc=1696)
0.33333334 = coord(1/3)
-
Na, S.-H.; Kang, I.-S.; Roh, J.-E.; Lee, J.-H.: ¬An empirical study of query expansion and cluster-based retrieval in language modeling approach (2007)
0.02
0.016279178 = product of:
0.04883753 = sum of:
0.04883753 = weight(_text_:j in 906) [ClassicSimilarity], result of:
0.04883753 = score(doc=906,freq=4.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.34753868 = fieldWeight in 906, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0546875 = fieldNorm(doc=906)
0.33333334 = coord(1/3)
-
Voorhees, E.M.: Implementing agglomerative hierarchic clustering algorithms for use in document retrieval (1986)
0.02
0.01597825 = product of:
0.047934752 = sum of:
0.047934752 = product of:
0.095869504 = sum of:
0.095869504 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
0.095869504 = score(doc=402,freq=2.0), product of:
0.15486756 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044224758 = queryNorm
0.61904186 = fieldWeight in 402, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.125 = fieldNorm(doc=402)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Information processing and management. 22(1986) no.6, S.465-476
-
¬An introduction to information retrieval (o.J.)
0.02
0.0151952505 = product of:
0.04558575 = sum of:
0.04558575 = product of:
0.0911715 = sum of:
0.0911715 = weight(_text_:van in 4533) [ClassicSimilarity], result of:
0.0911715 = score(doc=4533,freq=2.0), product of:
0.24662332 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.044224758 = queryNorm
0.36967915 = fieldWeight in 4533, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.046875 = fieldNorm(doc=4533)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- In the beginning IR was dominated by Boolean retrieval, described in the next section. This could be called the antediluvian period, or generation zero. The first generation of IR research dates from the early sixties, and was dominated by model building, experimentation, and heuristics. The big names were Gerry Salton and Karen Sparck Jones. The second period, which began in the mid-seventies, saw a big shift towards mathematics, and a rise of the IR model based upon probability theory - probabilistic IR. The big name here was, and continues to be, Stephen Robertson. More recently Keith van Rijsbergen has led a group that has developed underlying logical models of IR, but interesting as this new work is, it has not as yet led to results that offer improvements for the IR system builder. Xapian is firmly placed as a system that implements, or tries to implement, the probabilistic IR model. (We say 'tries' because sometimes implementation efficiency and theoretical complexity demand certain short-cuts.)
-
Qi, Q.; Hessen, D.J.; Heijden, P.G.M. van der: Improving information retrieval through correspondenceanalysis instead of latent semantic analysis (2023)
0.02
0.0151952505 = product of:
0.04558575 = sum of:
0.04558575 = product of:
0.0911715 = sum of:
0.0911715 = weight(_text_:van in 1045) [ClassicSimilarity], result of:
0.0911715 = score(doc=1045,freq=2.0), product of:
0.24662332 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.044224758 = queryNorm
0.36967915 = fieldWeight in 1045, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.046875 = fieldNorm(doc=1045)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
-
Lee, J.-T.; Seo, J.; Jeon, J.; Rim, H.-C.: Sentence-based relevance flow analysis for high accuracy retrieval (2011)
0.01
0.014241314 = product of:
0.04272394 = sum of:
0.04272394 = weight(_text_:j in 4746) [ClassicSimilarity], result of:
0.04272394 = score(doc=4746,freq=6.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.304033 = fieldWeight in 4746, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=4746)
0.33333334 = coord(1/3)
-
Jiang, J.-D.; Jiang, J.-Y.; Cheng, P.-J.: Cocluster hypothesis and ranking consistency for relevance ranking in web search (2019)
0.01
0.014241314 = product of:
0.04272394 = sum of:
0.04272394 = weight(_text_:j in 5247) [ClassicSimilarity], result of:
0.04272394 = score(doc=5247,freq=6.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.304033 = fieldWeight in 5247, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=5247)
0.33333334 = coord(1/3)
-
Rada, R.; Barlow, J.; Potharst, J.; Zanstra, P.; Bijstra, D.: Document ranking using an enriched thesaurus (1991)
0.01
0.0139535805 = product of:
0.04186074 = sum of:
0.04186074 = weight(_text_:j in 6626) [ClassicSimilarity], result of:
0.04186074 = score(doc=6626,freq=4.0), product of:
0.14052401 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.044224758 = queryNorm
0.2978903 = fieldWeight in 6626, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=6626)
0.33333334 = coord(1/3)
