-
Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001)
0.03
0.033031866 = product of:
0.06606373 = sum of:
0.06606373 = sum of:
0.01044454 = weight(_text_:a in 261) [ClassicSimilarity], result of:
0.01044454 = score(doc=261,freq=6.0), product of:
0.059167966 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.051314447 = queryNorm
0.17652355 = fieldWeight in 261, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0625 = fieldNorm(doc=261)
0.05561919 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
0.05561919 = score(doc=261,freq=2.0), product of:
0.17969444 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.051314447 = 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
- Type
- a
-
Griesbaum, J.; Rittberger, M.; Bekavac, B.: Deutsche Suchmaschinen im Vergleich : AltaVista.de, Fireball.de, Google.de und Lycos.de (2002)
0.00
0.001884424 = product of:
0.003768848 = sum of:
0.003768848 = product of:
0.007537696 = sum of:
0.007537696 = weight(_text_:a in 1159) [ClassicSimilarity], result of:
0.007537696 = score(doc=1159,freq=2.0), product of:
0.059167966 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.051314447 = queryNorm
0.12739488 = fieldWeight in 1159, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.078125 = fieldNorm(doc=1159)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Grasso, L.L.; Wahlig, H.: Google und seine Suchparameter : Eine Top 20-Precision Analyse anhand repräsentativ ausgewählter Anfragen (2005)
0.00
0.0015075393 = product of:
0.0030150786 = sum of:
0.0030150786 = product of:
0.006030157 = sum of:
0.006030157 = weight(_text_:a in 3275) [ClassicSimilarity], result of:
0.006030157 = score(doc=3275,freq=2.0), product of:
0.059167966 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.051314447 = queryNorm
0.10191591 = fieldWeight in 3275, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0625 = fieldNorm(doc=3275)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a
-
Günther, M.: Vermitteln Suchmaschinen vollständige Bilder aktueller Themen? : Untersuchung der Gewichtung inhaltlicher Aspekte von Suchmaschinenergebnissen in Deutschland und den USA (2016)
0.00
9.42212E-4 = product of:
0.001884424 = sum of:
0.001884424 = product of:
0.003768848 = sum of:
0.003768848 = weight(_text_:a in 3068) [ClassicSimilarity], result of:
0.003768848 = score(doc=3068,freq=2.0), product of:
0.059167966 = queryWeight, product of:
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.051314447 = queryNorm
0.06369744 = fieldWeight in 3068, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.153047 = idf(docFreq=37942, maxDocs=44218)
0.0390625 = fieldNorm(doc=3068)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- a