Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001)
0.01
0.010047926 = product of:
0.06028755 = sum of:
0.020941569 = weight(_text_:und in 261) [ClassicSimilarity], result of:
0.020941569 = score(doc=261,freq=10.0), product of:
0.04780656 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.021569785 = queryNorm
0.438048 = fieldWeight in 261, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0625 = fieldNorm(doc=261)
0.003527615 = weight(_text_:in in 261) [ClassicSimilarity], result of:
0.003527615 = score(doc=261,freq=2.0), product of:
0.029340398 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.021569785 = queryNorm
0.120230645 = fieldWeight in 261, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.0625 = fieldNorm(doc=261)
0.020941569 = weight(_text_:und in 261) [ClassicSimilarity], result of:
0.020941569 = score(doc=261,freq=10.0), product of:
0.04780656 = queryWeight, product of:
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.021569785 = queryNorm
0.438048 = fieldWeight in 261, product of:
3.1622777 = tf(freq=10.0), with freq of:
10.0 = termFreq=10.0
2.216367 = idf(docFreq=13101, maxDocs=44218)
0.0625 = fieldNorm(doc=261)
0.0031871665 = weight(_text_:s in 261) [ClassicSimilarity], result of:
0.0031871665 = score(doc=261,freq=4.0), product of:
0.023451481 = queryWeight, product of:
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.021569785 = queryNorm
0.1359047 = fieldWeight in 261, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.0872376 = idf(docFreq=40523, maxDocs=44218)
0.0625 = fieldNorm(doc=261)
0.011689632 = product of:
0.023379264 = sum of:
0.023379264 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
0.023379264 = score(doc=261,freq=2.0), product of:
0.07553371 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.021569785 = 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)
0.16666667 = coord(5/30)
- 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
- Footnote
- Vgl. auch den Bericht in: nfd 53(2002) H.2, S.71
- Source
- nfd Information - Wissenschaft und Praxis. 52(2001) H.7, S.381-392
