Search (2 results, page 1 of 1)

  • × theme_ss:"Suchmaschinen"
  • × theme_ss:"Retrievalstudien"
  1. Oppenheim, C.; Morris, A.; McKnight, C.: ¬The evaluation of WWW search engines (2000) 0.01
    0.012702176 = product of:
      0.025404353 = sum of:
        0.025404353 = product of:
          0.050808705 = sum of:
            0.050808705 = weight(_text_:c in 4546) [ClassicSimilarity], result of:
              0.050808705 = score(doc=4546,freq=4.0), product of:
                0.15711682 = queryWeight, product of:
                  3.4494052 = idf(docFreq=3817, maxDocs=44218)
                  0.045548957 = queryNorm
                0.32338172 = fieldWeight in 4546, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.4494052 = idf(docFreq=3817, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4546)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  2. Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001) 0.01
    0.01234251 = product of:
      0.02468502 = sum of:
        0.02468502 = product of:
          0.04937004 = sum of:
            0.04937004 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
              0.04937004 = score(doc=261,freq=2.0), product of:
                0.15950468 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045548957 = 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)
      0.5 = 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

Languages