-
Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001)
0.05
0.053772107 = product of:
0.10754421 = sum of:
0.10754421 = sum of:
0.058308005 = weight(_text_:w in 261) [ClassicSimilarity], result of:
0.058308005 = score(doc=261,freq=2.0), product of:
0.17310768 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.045425482 = queryNorm
0.33683082 = fieldWeight in 261, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0625 = fieldNorm(doc=261)
0.049236204 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
0.049236204 = score(doc=261,freq=2.0), product of:
0.1590723 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045425482 = queryNorm
0.30952093 = fieldWeight in 261, 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=261)
0.5 = coord(1/2)
- Abstract
- Die deutschen Suchmaschinen, Abacho, Acoon, Fireball und Lycos sowie die Web-Kataloge Web.de und Yahoo! werden einem Qualitätstest nach relativem Recall, Precision und Availability unterzogen. Die Methoden der Retrievaltests werden vorgestellt. Im Durchschnitt werden bei einem Cut-Off-Wert von 25 ein Recall von rund 22%, eine Precision von knapp 19% und eine Verfügbarkeit von 24% erreicht
-
Fan, W.; Luo, M.; Wang, L.; Xi, W.; Fox, E.A.: Tuning before feedback : combining ranking discovery and blind feedback for robust retrieval (2004)
0.03
0.025768742 = product of:
0.051537484 = sum of:
0.051537484 = product of:
0.10307497 = sum of:
0.10307497 = weight(_text_:w in 4052) [ClassicSimilarity], result of:
0.10307497 = score(doc=4052,freq=4.0), product of:
0.17310768 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.045425482 = queryNorm
0.5954384 = fieldWeight in 4052, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.078125 = fieldNorm(doc=4052)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Hiemstra, D.; Kraaij, W.: ¬A language-modeling approach to TREC (2005)
0.02
0.0218655 = product of:
0.043731 = sum of:
0.043731 = product of:
0.087462 = sum of:
0.087462 = weight(_text_:w in 5091) [ClassicSimilarity], result of:
0.087462 = score(doc=5091,freq=2.0), product of:
0.17310768 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.045425482 = queryNorm
0.5052462 = fieldWeight in 5091, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.09375 = fieldNorm(doc=5091)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000)
0.02
0.02154084 = product of:
0.04308168 = sum of:
0.04308168 = product of:
0.08616336 = sum of:
0.08616336 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
0.08616336 = score(doc=6438,freq=2.0), product of:
0.1590723 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045425482 = queryNorm
0.5416616 = fieldWeight in 6438, 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=6438)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 11. 8.2001 16:22:19
-
Leininger, K.: Interindexer consistency in PsychINFO (2000)
0.01
0.009231788 = product of:
0.018463576 = sum of:
0.018463576 = product of:
0.036927152 = sum of:
0.036927152 = weight(_text_:22 in 2552) [ClassicSimilarity], result of:
0.036927152 = score(doc=2552,freq=2.0), product of:
0.1590723 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045425482 = queryNorm
0.23214069 = fieldWeight in 2552, 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=2552)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 9. 2.1997 18:44:22
-
Mettrop, W.; Nieuwenhuysen, P.: Internet search engines : fluctuations in document accessibility (2001)
0.01
0.009110626 = product of:
0.018221252 = sum of:
0.018221252 = product of:
0.036442503 = sum of:
0.036442503 = weight(_text_:w in 4481) [ClassicSimilarity], result of:
0.036442503 = score(doc=4481,freq=2.0), product of:
0.17310768 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.045425482 = queryNorm
0.21051927 = fieldWeight in 4481, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0390625 = fieldNorm(doc=4481)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Radev, D.R.; Libner, K.; Fan, W.: Getting answers to natural language questions on the Web (2002)
0.01
0.009110626 = product of:
0.018221252 = sum of:
0.018221252 = product of:
0.036442503 = sum of:
0.036442503 = weight(_text_:w in 5204) [ClassicSimilarity], result of:
0.036442503 = score(doc=5204,freq=2.0), product of:
0.17310768 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.045425482 = queryNorm
0.21051927 = fieldWeight in 5204, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0390625 = fieldNorm(doc=5204)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Saracevic, T.: Effects of inconsistent relevance judgments on information retrieval test results : a historical perspective (2008)
0.01
0.009110626 = product of:
0.018221252 = sum of:
0.018221252 = product of:
0.036442503 = sum of:
0.036442503 = weight(_text_:w in 5585) [ClassicSimilarity], result of:
0.036442503 = score(doc=5585,freq=2.0), product of:
0.17310768 = queryWeight, product of:
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.045425482 = queryNorm
0.21051927 = fieldWeight in 5585, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.8108058 = idf(docFreq=2659, maxDocs=44218)
0.0390625 = fieldNorm(doc=5585)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Content
- Beitrag in einem Themenheft 'The Influence of F. W. Lancaster on Information Science and on Libraries', das als Festschrift für F.W. Lancaster deklariert ist.
-
King, D.W.: Blazing new trails : in celebration of an audacious career (2000)
0.01
0.007693157 = product of:
0.015386314 = sum of:
0.015386314 = product of:
0.030772628 = sum of:
0.030772628 = weight(_text_:22 in 1184) [ClassicSimilarity], result of:
0.030772628 = score(doc=1184,freq=2.0), product of:
0.1590723 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045425482 = queryNorm
0.19345059 = fieldWeight in 1184, 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=1184)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 9.1997 19:16:05
-
Petrelli, D.: On the role of user-centred evaluation in the advancement of interactive information retrieval (2008)
0.01
0.007693157 = product of:
0.015386314 = sum of:
0.015386314 = product of:
0.030772628 = sum of:
0.030772628 = weight(_text_:22 in 2026) [ClassicSimilarity], result of:
0.030772628 = score(doc=2026,freq=2.0), product of:
0.1590723 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045425482 = queryNorm
0.19345059 = fieldWeight in 2026, 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=2026)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- Information processing and management. 44(2008) no.1, S.22-38
-
Larsen, B.; Ingwersen, P.; Lund, B.: Data fusion according to the principle of polyrepresentation (2009)
0.01
0.0061545256 = product of:
0.012309051 = sum of:
0.012309051 = product of:
0.024618102 = sum of:
0.024618102 = weight(_text_:22 in 2752) [ClassicSimilarity], result of:
0.024618102 = score(doc=2752,freq=2.0), product of:
0.1590723 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.045425482 = queryNorm
0.15476047 = fieldWeight in 2752, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.03125 = fieldNorm(doc=2752)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 3.2009 18:48:28