-
Griesbaum, J.; Rittberger, M.; Bekavac, B.: Deutsche Suchmaschinen im Vergleich : AltaVista.de, Fireball.de, Google.de und Lycos.de (2002)
0.00
4.889993E-4 = product of:
0.00684599 = sum of:
0.00684599 = product of:
0.02738396 = sum of:
0.02738396 = weight(_text_:j in 1159) [ClassicSimilarity], result of:
0.02738396 = score(doc=1159,freq=2.0), product of:
0.07800208 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.024548283 = queryNorm
0.35106707 = fieldWeight in 1159, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.078125 = fieldNorm(doc=1159)
0.25 = coord(1/4)
0.071428575 = coord(1/14)
-
Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001)
0.00
4.751362E-4 = product of:
0.0066519068 = sum of:
0.0066519068 = product of:
0.026607627 = sum of:
0.026607627 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
0.026607627 = score(doc=261,freq=2.0), product of:
0.085963905 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.024548283 = 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)
0.25 = coord(1/4)
0.071428575 = coord(1/14)
- 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
-
Bar-Ilan, J.: Methods for measuring search engine performance over time (2002)
0.00
3.9119946E-4 = product of:
0.0054767923 = sum of:
0.0054767923 = product of:
0.02190717 = sum of:
0.02190717 = weight(_text_:j in 305) [ClassicSimilarity], result of:
0.02190717 = score(doc=305,freq=2.0), product of:
0.07800208 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.024548283 = queryNorm
0.28085366 = fieldWeight in 305, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0625 = fieldNorm(doc=305)
0.25 = coord(1/4)
0.071428575 = coord(1/14)
-
Griesbaum, J.: Evaluierung hybrider Suchsysteme im WWW (2000)
0.00
2.9339961E-4 = product of:
0.0041075945 = sum of:
0.0041075945 = product of:
0.016430378 = sum of:
0.016430378 = weight(_text_:j in 2482) [ClassicSimilarity], result of:
0.016430378 = score(doc=2482,freq=2.0), product of:
0.07800208 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.024548283 = queryNorm
0.21064025 = fieldWeight in 2482, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2482)
0.25 = coord(1/4)
0.071428575 = coord(1/14)
-
Serrano Cobos, J.; Quintero Orta, A.: Design, development and management of an information recovery system for an Internet Website : from documentary theory to practice (2003)
0.00
2.9339961E-4 = product of:
0.0041075945 = sum of:
0.0041075945 = product of:
0.016430378 = sum of:
0.016430378 = weight(_text_:j in 2726) [ClassicSimilarity], result of:
0.016430378 = score(doc=2726,freq=2.0), product of:
0.07800208 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.024548283 = queryNorm
0.21064025 = fieldWeight in 2726, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2726)
0.25 = coord(1/4)
0.071428575 = coord(1/14)