Search (3 results, page 1 of 1)

  • × language_ss:"d"
  • × theme_ss:"Retrievalstudien"
  • × theme_ss:"Suchmaschinen"
  1. Griesbaum, J.; Rittberger, M.; Bekavac, B.: Deutsche Suchmaschinen im Vergleich : AltaVista.de, Fireball.de, Google.de und Lycos.de (2002) 0.02
    0.015317266 = product of:
      0.05361043 = sum of:
        0.035740286 = weight(_text_:j in 1159) [ClassicSimilarity], result of:
          0.035740286 = score(doc=1159,freq=2.0), product of:
            0.101804726 = queryWeight, product of:
              3.1774964 = idf(docFreq=5010, maxDocs=44218)
              0.03203929 = 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)
        0.017870143 = product of:
          0.035740286 = sum of:
            0.035740286 = weight(_text_:j in 1159) [ClassicSimilarity], result of:
              0.035740286 = score(doc=1159,freq=2.0), product of:
                0.101804726 = queryWeight, product of:
                  3.1774964 = idf(docFreq=5010, maxDocs=44218)
                  0.03203929 = 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)
          0.5 = coord(1/2)
      0.2857143 = coord(2/7)
    
  2. Griesbaum, J.: Evaluierung hybrider Suchsysteme im WWW (2000) 0.01
    0.009190361 = product of:
      0.03216626 = sum of:
        0.021444174 = weight(_text_:j in 2482) [ClassicSimilarity], result of:
          0.021444174 = score(doc=2482,freq=2.0), product of:
            0.101804726 = queryWeight, product of:
              3.1774964 = idf(docFreq=5010, maxDocs=44218)
              0.03203929 = 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)
        0.010722087 = product of:
          0.021444174 = sum of:
            0.021444174 = weight(_text_:j in 2482) [ClassicSimilarity], result of:
              0.021444174 = score(doc=2482,freq=2.0), product of:
                0.101804726 = queryWeight, product of:
                  3.1774964 = idf(docFreq=5010, maxDocs=44218)
                  0.03203929 = 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)
          0.5 = coord(1/2)
      0.2857143 = coord(2/7)
    
  3. Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001) 0.00
    0.0024805039 = product of:
      0.017363526 = sum of:
        0.017363526 = product of:
          0.03472705 = sum of:
            0.03472705 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
              0.03472705 = score(doc=261,freq=2.0), product of:
                0.11219613 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03203929 = 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)
      0.14285715 = coord(1/7)
    
    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