-
Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983)
0.09
0.0928514 = product of:
0.2785542 = sum of:
0.2785542 = sum of:
0.1997773 = weight(_text_:van in 2134) [ClassicSimilarity], result of:
0.1997773 = score(doc=2134,freq=2.0), product of:
0.23160313 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04153132 = 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)
0.07877689 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
0.07877689 = score(doc=2134,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = 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
-
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
0.039793458 = product of:
0.11938037 = sum of:
0.11938037 = sum of:
0.085618846 = weight(_text_:van in 1451) [ClassicSimilarity], result of:
0.085618846 = score(doc=1451,freq=2.0), product of:
0.23160313 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04153132 = 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)
0.033761524 = weight(_text_:22 in 1451) [ClassicSimilarity], result of:
0.033761524 = score(doc=1451,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = 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
-
Rijsbergen, C.J. van: ¬A fast hierarchic clustering algorithm (1970)
0.04
0.038052823 = product of:
0.11415847 = sum of:
0.11415847 = product of:
0.22831693 = sum of:
0.22831693 = weight(_text_:van in 3300) [ClassicSimilarity], result of:
0.22831693 = score(doc=3300,freq=2.0), product of:
0.23160313 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04153132 = 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)
-
Van der Veer Martens, B.; Fleet, C. van: Opening the black box of "relevance work" : a domain analysis (2012)
0.02
0.020180557 = product of:
0.06054167 = sum of:
0.06054167 = product of:
0.12108334 = sum of:
0.12108334 = weight(_text_:van in 247) [ClassicSimilarity], result of:
0.12108334 = score(doc=247,freq=4.0), product of:
0.23160313 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04153132 = 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
0.019026412 = product of:
0.057079233 = sum of:
0.057079233 = product of:
0.11415847 = sum of:
0.11415847 = weight(_text_:van in 1071) [ClassicSimilarity], result of:
0.11415847 = score(doc=1071,freq=2.0), product of:
0.23160313 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04153132 = 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)
-
Voorhees, E.M.: Implementing agglomerative hierarchic clustering algorithms for use in document retrieval (1986)
0.02
0.015005123 = product of:
0.04501537 = sum of:
0.04501537 = product of:
0.09003074 = sum of:
0.09003074 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
0.09003074 = score(doc=402,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = 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.)
0.01
0.014269808 = product of:
0.042809423 = sum of:
0.042809423 = product of:
0.085618846 = sum of:
0.085618846 = weight(_text_:van in 4533) [ClassicSimilarity], result of:
0.085618846 = score(doc=4533,freq=2.0), product of:
0.23160313 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04153132 = 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)
0.01
0.014269808 = product of:
0.042809423 = sum of:
0.042809423 = product of:
0.085618846 = sum of:
0.085618846 = weight(_text_:van in 1045) [ClassicSimilarity], result of:
0.085618846 = score(doc=1045,freq=2.0), product of:
0.23160313 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04153132 = 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)
-
Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000)
0.01
0.013129482 = product of:
0.039388444 = sum of:
0.039388444 = product of:
0.07877689 = sum of:
0.07877689 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
0.07877689 = score(doc=3445,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = 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)
0.33333334 = coord(1/3)
- Date
- 25. 8.2005 17:42:22
-
Ruthven, T.; Lalmas, M.; Rijsbergen, K.van: Incorporating user research behavior into relevance feedback (2003)
0.01
0.011891507 = product of:
0.03567452 = sum of:
0.03567452 = product of:
0.07134904 = sum of:
0.07134904 = weight(_text_:van in 5169) [ClassicSimilarity], result of:
0.07134904 = score(doc=5169,freq=2.0), product of:
0.23160313 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04153132 = queryNorm
0.30806595 = fieldWeight in 5169, 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=5169)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Abstract
- Ruthven, Mounia, and van Rijsbergen rank and select terms for query expansion using information gathered on searcher evaluation behavior. Using the TREC Financial Times and Los Angeles Times collections and search topics from TREC-6 placed in simulated work situations, six student subjects each preformed three searches on an experimental system and three on a control system with instructions to search by natural language expression in any way they found comfortable. Searching was analyzed for behavior differences between experimental and control situations, and for effectiveness and perceptions. In three experiments paired t-tests were the analysis tool with controls being a no relevance feedback system, a standard ranking for automatic expansion system, and a standard ranking for interactive expansion while the experimental systems based ranking upon user information on temporal relevance and partial relevance. Two further experiments compare using user behavior (number assessed relevant and similarity of relevant documents) to choose a query expansion technique against a non-selective technique and finally the effect of providing the user with knowledge of the process. When partial relevance data and time of assessment data are incorporated in term ranking more relevant documents were recovered in fewer iterations, however retrieval effectiveness overall was not improved. The subjects, none-the-less, rated the suggested terms as more useful and used them more heavily. Explanations of what the feedback techniques were doing led to higher use of the techniques.
-
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)
0.01
0.011891507 = product of:
0.03567452 = sum of:
0.03567452 = product of:
0.07134904 = sum of:
0.07134904 = weight(_text_:van in 1022) [ClassicSimilarity], result of:
0.07134904 = score(doc=1022,freq=2.0), product of:
0.23160313 = queryWeight, product of:
5.5765896 = idf(docFreq=454, maxDocs=44218)
0.04153132 = 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)
0.33333334 = coord(1/3)
-
Fuhr, N.: Ranking-Experimente mit gewichteter Indexierung (1986)
0.01
0.011253841 = product of:
0.033761524 = sum of:
0.033761524 = product of:
0.06752305 = sum of:
0.06752305 = weight(_text_:22 in 58) [ClassicSimilarity], result of:
0.06752305 = score(doc=58,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = queryNorm
0.46428138 = fieldWeight in 58, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=58)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 14. 6.2015 22:12:44
-
Fuhr, N.: Rankingexperimente mit gewichteter Indexierung (1986)
0.01
0.011253841 = product of:
0.033761524 = sum of:
0.033761524 = product of:
0.06752305 = sum of:
0.06752305 = weight(_text_:22 in 2051) [ClassicSimilarity], result of:
0.06752305 = score(doc=2051,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = queryNorm
0.46428138 = fieldWeight in 2051, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=2051)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 14. 6.2015 22:12:56
-
MacFarlane, A.; Robertson, S.E.; McCann, J.A.: Parallel computing for passage retrieval (2004)
0.01
0.0075025614 = product of:
0.022507684 = sum of:
0.022507684 = product of:
0.04501537 = sum of:
0.04501537 = weight(_text_:22 in 5108) [ClassicSimilarity], result of:
0.04501537 = score(doc=5108,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = queryNorm
0.30952093 = fieldWeight in 5108, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=5108)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 20. 1.2007 18:30:22
-
Faloutsos, C.: Signature files (1992)
0.01
0.0075025614 = product of:
0.022507684 = sum of:
0.022507684 = product of:
0.04501537 = sum of:
0.04501537 = weight(_text_:22 in 3499) [ClassicSimilarity], result of:
0.04501537 = score(doc=3499,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = queryNorm
0.30952093 = fieldWeight in 3499, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=3499)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 7. 5.1999 15:22:48
-
Losada, D.E.; Barreiro, A.: Emebedding term similarity and inverse document frequency into a logical model of information retrieval (2003)
0.01
0.0075025614 = product of:
0.022507684 = sum of:
0.022507684 = product of:
0.04501537 = sum of:
0.04501537 = weight(_text_:22 in 1422) [ClassicSimilarity], result of:
0.04501537 = score(doc=1422,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = queryNorm
0.30952093 = fieldWeight in 1422, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=1422)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 22. 3.2003 19:27:23
-
Bornmann, L.; Mutz, R.: From P100 to P100' : a new citation-rank approach (2014)
0.01
0.0075025614 = product of:
0.022507684 = sum of:
0.022507684 = product of:
0.04501537 = sum of:
0.04501537 = weight(_text_:22 in 1431) [ClassicSimilarity], result of:
0.04501537 = score(doc=1431,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = queryNorm
0.30952093 = fieldWeight in 1431, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=1431)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 22. 8.2014 17:05:18
-
Tober, M.; Hennig, L.; Furch, D.: SEO Ranking-Faktoren und Rang-Korrelationen 2014 : Google Deutschland (2014)
0.01
0.0075025614 = product of:
0.022507684 = sum of:
0.022507684 = product of:
0.04501537 = sum of:
0.04501537 = weight(_text_:22 in 1484) [ClassicSimilarity], result of:
0.04501537 = score(doc=1484,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = queryNorm
0.30952093 = fieldWeight in 1484, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=1484)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 13. 9.2014 14:45:22
-
Ravana, S.D.; Rajagopal, P.; Balakrishnan, V.: Ranking retrieval systems using pseudo relevance judgments (2015)
0.01
0.00663139 = product of:
0.01989417 = sum of:
0.01989417 = product of:
0.03978834 = sum of:
0.03978834 = weight(_text_:22 in 2591) [ClassicSimilarity], result of:
0.03978834 = score(doc=2591,freq=4.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = queryNorm
0.27358043 = fieldWeight in 2591, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=2591)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 20. 1.2015 18:30:22
18. 9.2018 18:22:56
-
Chang, C.-H.; Hsu, C.-C.: Integrating query expansion and conceptual relevance feedback for personalized Web information retrieval (1998)
0.01
0.006564741 = product of:
0.019694222 = sum of:
0.019694222 = product of:
0.039388444 = sum of:
0.039388444 = weight(_text_:22 in 1319) [ClassicSimilarity], result of:
0.039388444 = score(doc=1319,freq=2.0), product of:
0.14543562 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04153132 = queryNorm
0.2708308 = fieldWeight in 1319, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=1319)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Date
- 1. 8.1996 22:08:06
