Search (3 results, page 1 of 1)

  • × theme_ss:"Retrievalstudien"
  • × theme_ss:"Suchmaschinen"
  • × year_i:[2000 TO 2010}
  1. Bar-Ilan, J.: Methods for measuring search engine performance over time (2002) 0.00
    0.0021168988 = product of:
      0.008467595 = sum of:
        0.008467595 = product of:
          0.042337976 = sum of:
            0.042337976 = weight(_text_:29 in 305) [ClassicSimilarity], result of:
              0.042337976 = score(doc=305,freq=2.0), product of:
                0.13616888 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.038709775 = queryNorm
                0.31092256 = fieldWeight in 305, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.0625 = fieldNorm(doc=305)
          0.2 = coord(1/5)
      0.25 = coord(1/4)
    
    Date
    23. 3.2002 9:50:29
  2. Dresel, R.; Hörnig, D.; Kaluza, H.; Peter, A.; Roßmann, A.; Sieber, W.: Evaluation deutscher Web-Suchwerkzeuge : Ein vergleichender Retrievaltest (2001) 0.00
    0.002097856 = product of:
      0.008391424 = sum of:
        0.008391424 = product of:
          0.041957118 = sum of:
            0.041957118 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
              0.041957118 = score(doc=261,freq=2.0), product of:
                0.13555503 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.038709775 = 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)
          0.2 = coord(1/5)
      0.25 = coord(1/4)
    
    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
  3. 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
    0.0016465007 = product of:
      0.0065860027 = sum of:
        0.0065860027 = product of:
          0.032930013 = sum of:
            0.032930013 = weight(_text_:28 in 2726) [ClassicSimilarity], result of:
              0.032930013 = score(doc=2726,freq=2.0), product of:
                0.1386686 = queryWeight, product of:
                  3.5822632 = idf(docFreq=3342, maxDocs=44218)
                  0.038709775 = queryNorm
                0.23747274 = fieldWeight in 2726, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5822632 = idf(docFreq=3342, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2726)
          0.2 = coord(1/5)
      0.25 = coord(1/4)
    
    Date
    6. 1.1997 18:30:28