-
Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992)
0.01
0.009475192 = product of:
0.03790077 = sum of:
0.03790077 = weight(_text_:library in 2731) [ClassicSimilarity], result of:
0.03790077 = score(doc=2731,freq=4.0), product of:
0.1317883 = queryWeight, product of:
2.6293786 = idf(docFreq=8668, maxDocs=44218)
0.050121464 = queryNorm
0.28758827 = fieldWeight in 2731, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
2.6293786 = idf(docFreq=8668, maxDocs=44218)
0.0546875 = fieldNorm(doc=2731)
0.25 = coord(1/4)
- Abstract
- An automatic query expansion (AQE) facility in anonline catalogue was evaluated in an operational library setting. The OKAPI experimental system had other features including: ranked output 'best match' keyword searching, automatic stemming, spelling normalisation and cross referencing as well as relevance feedback. A combination of transaction log analysis, search replays, questionnaires and interviews was used for data collection. Findings show that contrary to previous results, AQE was beneficial in a substantial number of searches. Use intentions, the effectiveness of the 'best match' search and user interaction were identified as the main factors affecting the take-up of the query expansion facility
-
Robertson, S.E.: OKAPI at TREC-3 (1995)
0.01
0.006699973 = product of:
0.026799891 = sum of:
0.026799891 = weight(_text_:library in 5694) [ClassicSimilarity], result of:
0.026799891 = score(doc=5694,freq=2.0), product of:
0.1317883 = queryWeight, product of:
2.6293786 = idf(docFreq=8668, maxDocs=44218)
0.050121464 = queryNorm
0.20335563 = fieldWeight in 5694, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.6293786 = idf(docFreq=8668, maxDocs=44218)
0.0546875 = fieldNorm(doc=5694)
0.25 = coord(1/4)
- Imprint
- London : British Library
-
Chang, C.-H.; Hsu, C.-C.: Integrating query expansion and conceptual relevance feedback for personalized Web information retrieval (1998)
0.01
0.0059419204 = product of:
0.023767682 = sum of:
0.023767682 = product of:
0.047535364 = sum of:
0.047535364 = weight(_text_:22 in 1319) [ClassicSimilarity], result of:
0.047535364 = score(doc=1319,freq=2.0), product of:
0.17551683 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050121464 = 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)
0.25 = coord(1/4)
- Date
- 1. 8.1996 22:08:06
-
Efthimiadis, E.N.: User choices : a new yardstick for the evaluation of ranking algorithms for interactive query expansion (1995)
0.00
0.0042442293 = product of:
0.016976917 = sum of:
0.016976917 = product of:
0.033953834 = sum of:
0.033953834 = weight(_text_:22 in 5697) [ClassicSimilarity], result of:
0.033953834 = score(doc=5697,freq=2.0), product of:
0.17551683 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050121464 = 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)
0.5 = coord(1/2)
0.25 = coord(1/4)
- Date
- 22. 2.1996 13:14:10