-
Faloutsos, C.: Signature files (1992)
0.03
0.031076131 = product of:
0.062152263 = sum of:
0.062152263 = product of:
0.09322839 = sum of:
0.043994475 = weight(_text_:r in 3499) [ClassicSimilarity], result of:
0.043994475 = score(doc=3499,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.29258826 = fieldWeight in 3499, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.0625 = fieldNorm(doc=3499)
0.049233917 = weight(_text_:22 in 3499) [ClassicSimilarity], result of:
0.049233917 = score(doc=3499,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = 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)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 7. 5.1999 15:22:48
- Source
- Information retrieval: data structures and algorithms. Ed.: W.B. Frakes u. R. Baeza-Yates
-
Bornmann, L.; Mutz, R.: From P100 to P100' : a new citation-rank approach (2014)
0.03
0.031076131 = product of:
0.062152263 = sum of:
0.062152263 = product of:
0.09322839 = sum of:
0.043994475 = weight(_text_:r in 1431) [ClassicSimilarity], result of:
0.043994475 = score(doc=1431,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.29258826 = fieldWeight in 1431, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.0625 = fieldNorm(doc=1431)
0.049233917 = weight(_text_:22 in 1431) [ClassicSimilarity], result of:
0.049233917 = score(doc=1431,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = 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)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 8.2014 17:05:18
-
Harman, D.; Fox, E.; Baeza-Yates, R.; Lee, W.: Inverted files (1992)
0.03
0.025569802 = product of:
0.051139604 = sum of:
0.051139604 = product of:
0.076709405 = sum of:
0.014491823 = weight(_text_:d in 3497) [ClassicSimilarity], result of:
0.014491823 = score(doc=3497,freq=2.0), product of:
0.086298585 = queryWeight, product of:
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.04542337 = queryNorm
0.16792654 = fieldWeight in 3497, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.0625 = fieldNorm(doc=3497)
0.062217586 = weight(_text_:r in 3497) [ClassicSimilarity], result of:
0.062217586 = score(doc=3497,freq=4.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.4137823 = fieldWeight in 3497, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.0625 = fieldNorm(doc=3497)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Source
- Information retrieval: data structures and algorithms. Ed.: W.B. Frakes u. R. Baeza-Yates
-
Kelledy, F.; Smeaton, A.F.: Signature files and beyond (1996)
0.02
0.023307098 = product of:
0.046614196 = sum of:
0.046614196 = product of:
0.06992129 = sum of:
0.032995857 = weight(_text_:r in 6973) [ClassicSimilarity], result of:
0.032995857 = score(doc=6973,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.2194412 = fieldWeight in 6973, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.046875 = fieldNorm(doc=6973)
0.036925435 = weight(_text_:22 in 6973) [ClassicSimilarity], result of:
0.036925435 = score(doc=6973,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = queryNorm
0.23214069 = fieldWeight in 6973, 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=6973)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Source
- Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
-
Klas, C.-P.; Fuhr, N.; Schaefer, A.: Evaluating strategic support for information access in the DAFFODIL system (2004)
0.02
0.023307098 = product of:
0.046614196 = sum of:
0.046614196 = product of:
0.06992129 = sum of:
0.032995857 = weight(_text_:r in 2419) [ClassicSimilarity], result of:
0.032995857 = score(doc=2419,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.2194412 = fieldWeight in 2419, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.046875 = fieldNorm(doc=2419)
0.036925435 = weight(_text_:22 in 2419) [ClassicSimilarity], result of:
0.036925435 = score(doc=2419,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = queryNorm
0.23214069 = fieldWeight in 2419, 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=2419)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 16.11.2008 16:22:48
- Source
- Research and advanced technology for digital libraries : 8th European conference, ECDL 2004, Bath, UK, September 12-17, 2004 : proceedings. Eds.: Heery, R. u. E. Lyon
-
Harman, D.: Relevance feedback and other query modification techniques (1992)
0.02
0.019495433 = product of:
0.038990866 = sum of:
0.038990866 = product of:
0.058486298 = sum of:
0.014491823 = weight(_text_:d in 3508) [ClassicSimilarity], result of:
0.014491823 = score(doc=3508,freq=2.0), product of:
0.086298585 = queryWeight, product of:
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.04542337 = queryNorm
0.16792654 = fieldWeight in 3508, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.0625 = fieldNorm(doc=3508)
0.043994475 = weight(_text_:r in 3508) [ClassicSimilarity], result of:
0.043994475 = score(doc=3508,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.29258826 = fieldWeight in 3508, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.0625 = fieldNorm(doc=3508)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Source
- Information retrieval: data structures and algorithms. Ed.: W.B. Frakes u. R. Baeza-Yates
-
Harman, D.: Ranking algorithms (1992)
0.02
0.019495433 = product of:
0.038990866 = sum of:
0.038990866 = product of:
0.058486298 = sum of:
0.014491823 = weight(_text_:d in 3511) [ClassicSimilarity], result of:
0.014491823 = score(doc=3511,freq=2.0), product of:
0.086298585 = queryWeight, product of:
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.04542337 = queryNorm
0.16792654 = fieldWeight in 3511, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.0625 = fieldNorm(doc=3511)
0.043994475 = weight(_text_:r in 3511) [ClassicSimilarity], result of:
0.043994475 = score(doc=3511,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.29258826 = fieldWeight in 3511, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.0625 = fieldNorm(doc=3511)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Source
- Information retrieval: data structures and algorithms. Ed.: W.B. Frakes u. R. Baeza-Yates
-
Burgin, R.: ¬The retrieval effectiveness of 5 clustering algorithms as a function of indexing exhaustivity (1995)
0.02
0.019422583 = product of:
0.038845167 = sum of:
0.038845167 = product of:
0.058267746 = sum of:
0.027496547 = weight(_text_:r in 3365) [ClassicSimilarity], result of:
0.027496547 = score(doc=3365,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.18286766 = fieldWeight in 3365, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.0390625 = fieldNorm(doc=3365)
0.0307712 = weight(_text_:22 in 3365) [ClassicSimilarity], result of:
0.0307712 = score(doc=3365,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = queryNorm
0.19345059 = fieldWeight in 3365, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=3365)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 2.1996 11:20:06
-
Efthimiadis, E.N.: User choices : a new yardstick for the evaluation of ranking algorithms for interactive query expansion (1995)
0.02
0.019422583 = product of:
0.038845167 = sum of:
0.038845167 = product of:
0.058267746 = sum of:
0.027496547 = weight(_text_:r in 5697) [ClassicSimilarity], result of:
0.027496547 = score(doc=5697,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.18286766 = fieldWeight in 5697, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.0390625 = fieldNorm(doc=5697)
0.0307712 = weight(_text_:22 in 5697) [ClassicSimilarity], result of:
0.0307712 = score(doc=5697,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = queryNorm
0.19345059 = fieldWeight in 5697, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=5697)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- The performance of 8 ranking algorithms was evaluated with respect to their effectiveness in ranking terms for query expansion. The evaluation was conducted within an investigation of interactive query expansion and relevance feedback in a real operational environment. Focuses on the identification of algorithms that most effectively take cognizance of user preferences. user choices (i.e. the terms selected by the searchers for the query expansion search) provided the yardstick for the evaluation of the 8 ranking algorithms. This methodology introduces a user oriented approach in evaluating ranking algorithms for query expansion in contrast to the standard, system oriented approaches. Similarities in the performance of the 8 algorithms and the ways these algorithms rank terms were the main focus of this evaluation. The findings demonstrate that the r-lohi, wpq, enim, and porter algorithms have similar performance in bringing good terms to the top of a ranked list of terms for query expansion. However, further evaluation of the algorithms in different (e.g. full text) environments is needed before these results can be generalized beyond the context of the present study
- Date
- 22. 2.1996 13:14:10
-
Baloh, P.; Desouza, K.C.; Hackney, R.: Contextualizing organizational interventions of knowledge management systems : a design science perspectiveA domain analysis (2012)
0.02
0.019422583 = product of:
0.038845167 = sum of:
0.038845167 = product of:
0.058267746 = sum of:
0.027496547 = weight(_text_:r in 241) [ClassicSimilarity], result of:
0.027496547 = score(doc=241,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.18286766 = fieldWeight in 241, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.0390625 = fieldNorm(doc=241)
0.0307712 = weight(_text_:22 in 241) [ClassicSimilarity], result of:
0.0307712 = score(doc=241,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = queryNorm
0.19345059 = fieldWeight in 241, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=241)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 11. 6.2012 14:22:34
-
Voorhees, E.M.: Implementing agglomerative hierarchic clustering algorithms for use in document retrieval (1986)
0.02
0.016411306 = product of:
0.032822613 = sum of:
0.032822613 = product of:
0.098467834 = sum of:
0.098467834 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
0.098467834 = score(doc=402,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = 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)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Information processing and management. 22(1986) no.6, S.465-476
-
Rada, R.; Bicknell, E.: Ranking documents with a thesaurus (1989)
0.01
0.014664825 = product of:
0.02932965 = sum of:
0.02932965 = product of:
0.08798895 = sum of:
0.08798895 = weight(_text_:r in 6908) [ClassicSimilarity], result of:
0.08798895 = score(doc=6908,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.5851765 = fieldWeight in 6908, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.125 = fieldNorm(doc=6908)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Rada, R.; Barlow, J.; Potharst, J.; Zanstra, P.; Bijstra, D.: Document ranking using an enriched thesaurus (1991)
0.01
0.014621574 = product of:
0.029243149 = sum of:
0.029243149 = product of:
0.043864723 = sum of:
0.010868866 = weight(_text_:d in 6626) [ClassicSimilarity], result of:
0.010868866 = score(doc=6626,freq=2.0), product of:
0.086298585 = queryWeight, product of:
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.04542337 = queryNorm
0.1259449 = fieldWeight in 6626, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.046875 = fieldNorm(doc=6626)
0.032995857 = weight(_text_:r in 6626) [ClassicSimilarity], result of:
0.032995857 = score(doc=6626,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.2194412 = fieldWeight in 6626, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.046875 = fieldNorm(doc=6626)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
-
Information retrieval : data structures and algorithms (1992)
0.01
0.014394803 = product of:
0.028789606 = sum of:
0.028789606 = product of:
0.043184407 = sum of:
0.015687859 = weight(_text_:d in 3495) [ClassicSimilarity], result of:
0.015687859 = score(doc=3495,freq=6.0), product of:
0.086298585 = queryWeight, product of:
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.04542337 = queryNorm
0.18178582 = fieldWeight in 3495, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.0390625 = fieldNorm(doc=3495)
0.027496547 = weight(_text_:r in 3495) [ClassicSimilarity], result of:
0.027496547 = score(doc=3495,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.18286766 = fieldWeight in 3495, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.0390625 = fieldNorm(doc=3495)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Content
- An edited volume containing data structures and algorithms for information retrieval including a disk with examples written in C. for prgrammers and students interested in parsing text, automated indexing, its the first collection in book form of the basic data structures and algorithms that are critical to the storage and retrieval of documents. ------------------Enthält die Kapitel: FRAKES, W.B.: Introduction to information storage and retrieval systems; BAEZA-YATES, R.S.: Introduction to data structures and algorithms related to information retrieval; HARMAN, D. u.a.: Inverted files; FALOUTSOS, C.: Signature files; GONNET, G.H. u.a.: New indices for text: PAT trees and PAT arrays; FORD, D.A. u. S. CHRISTODOULAKIS: File organizations for optical disks; FOX, C.: Lexical analysis and stoplists; FRAKES, W.B.: Stemming algorithms; SRINIVASAN, P.: Thesaurus construction; BAEZA-YATES, R.A.: String searching algorithms; HARMAN, D.: Relevance feedback and other query modification techniques; WARTIK, S.: Boolean operators; WARTIK, S. u.a.: Hashing algorithms; HARMAN, D.: Ranking algorithms; FOX, E.: u.a.: Extended Boolean models; RASMUSSEN, E.: Clustering algorithms; HOLLAAR, L.: Special-purpose hardware for information retrieval; STANFILL, C.: Parallel information retrieval algorithms
- Editor
- Frakes, W.B. u. R. Baeza-Yates
-
Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983)
0.01
0.014359893 = product of:
0.028719787 = sum of:
0.028719787 = product of:
0.086159356 = sum of:
0.086159356 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
0.086159356 = score(doc=2134,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = 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(1/2)
- Date
- 30. 3.2001 13:32:22
-
Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000)
0.01
0.014359893 = product of:
0.028719787 = sum of:
0.028719787 = product of:
0.086159356 = sum of:
0.086159356 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
0.086159356 = score(doc=3445,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = 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)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Date
- 25. 8.2005 17:42:22
-
Song, D.; Bruza, P.D.: Towards context sensitive information inference (2003)
0.01
0.013276197 = product of:
0.026552394 = sum of:
0.026552394 = product of:
0.03982859 = sum of:
0.00905739 = weight(_text_:d in 1428) [ClassicSimilarity], result of:
0.00905739 = score(doc=1428,freq=2.0), product of:
0.086298585 = queryWeight, product of:
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.04542337 = queryNorm
0.104954086 = fieldWeight in 1428, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.0390625 = fieldNorm(doc=1428)
0.0307712 = weight(_text_:22 in 1428) [ClassicSimilarity], result of:
0.0307712 = score(doc=1428,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = queryNorm
0.19345059 = fieldWeight in 1428, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=1428)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Date
- 22. 3.2003 19:35:46
-
Shiri, A.A.; Revie, C.: Query expansion behavior within a thesaurus-enhanced search environment : a user-centered evaluation (2006)
0.01
0.013276197 = product of:
0.026552394 = sum of:
0.026552394 = product of:
0.03982859 = sum of:
0.00905739 = weight(_text_:d in 56) [ClassicSimilarity], result of:
0.00905739 = score(doc=56,freq=2.0), product of:
0.086298585 = queryWeight, product of:
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.04542337 = queryNorm
0.104954086 = fieldWeight in 56, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.899872 = idf(docFreq=17979, maxDocs=44218)
0.0390625 = fieldNorm(doc=56)
0.0307712 = weight(_text_:22 in 56) [ClassicSimilarity], result of:
0.0307712 = score(doc=56,freq=2.0), product of:
0.1590649 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.04542337 = queryNorm
0.19345059 = fieldWeight in 56, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=56)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- The study reported here investigated the query expansion behavior of end-users interacting with a thesaurus-enhanced search system on the Web. Two groups, namely academic staff and postgraduate students, were recruited into this study. Data were collected from 90 searches performed by 30 users using the OVID interface to the CAB abstracts database. Data-gathering techniques included questionnaires, screen capturing software, and interviews. The results presented here relate to issues of search-topic and search-term characteristics, number and types of expanded queries, usefulness of thesaurus terms, and behavioral differences between academic staff and postgraduate students in their interaction. The key conclusions drawn were that (a) academic staff chose more narrow and synonymous terms than did postgraduate students, who generally selected broader and related terms; (b) topic complexity affected users' interaction with the thesaurus in that complex topics required more query expansion and search term selection; (c) users' prior topic-search experience appeared to have a significant effect on their selection and evaluation of thesaurus terms; (d) in 50% of the searches where additional terms were suggested from the thesaurus, users stated that they had not been aware of the terms at the beginning of the search; this observation was particularly noticeable in the case of postgraduate students.
- Date
- 22. 7.2006 16:32:43
-
Perry, R.; Willett, P.: ¬A revies of the use of inverted files for best match searching in information retrieval systems (1983)
0.01
0.012831721 = product of:
0.025663443 = sum of:
0.025663443 = product of:
0.07699033 = sum of:
0.07699033 = weight(_text_:r in 2701) [ClassicSimilarity], result of:
0.07699033 = score(doc=2701,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.51202947 = fieldWeight in 2701, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.109375 = fieldNorm(doc=2701)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Ciocca, G.; Schettini, R.: ¬A relevance feedback mechanism for content-based image retrieval (1999)
0.01
0.012831721 = product of:
0.025663443 = sum of:
0.025663443 = product of:
0.07699033 = sum of:
0.07699033 = weight(_text_:r in 6498) [ClassicSimilarity], result of:
0.07699033 = score(doc=6498,freq=2.0), product of:
0.15036309 = queryWeight, product of:
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.04542337 = queryNorm
0.51202947 = fieldWeight in 6498, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.3102584 = idf(docFreq=4387, maxDocs=44218)
0.109375 = fieldNorm(doc=6498)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
