Search (4 results, page 1 of 1)

  • × theme_ss:"Retrievalstudien"
  • × theme_ss:"Suchmaschinen"
  1. Clarke, S.J.; Willett, P.: Estimating the recall performance of Web search engines (1997) 0.01 
    0.010683826 = product of:
  0.021367652 = sum of:
    0.021367652 = product of:
      0.042735305 = sum of:
        0.042735305 = weight(_text_:p in 760) [ClassicSimilarity], result of:
          0.042735305 = score(doc=760,freq=2.0), product of:
            0.13447173 = queryWeight, product of:
              3.5955126 = idf(docFreq=3298, maxDocs=44218)
              0.037399877 = queryNorm
            0.31780142 = fieldWeight in 760, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5955126 = idf(docFreq=3298, maxDocs=44218)
              0.0625 = fieldNorm(doc=760)
      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 
    0.010134334 = product of:
  0.020268667 = sum of:
    0.020268667 = product of:
      0.040537335 = sum of:
        0.040537335 = weight(_text_:22 in 261) [ClassicSimilarity], result of:
          0.040537335 = score(doc=261,freq=2.0), product of:
            0.13096799 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.037399877 = 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
  3. Schaer, P.; Mayr, P.; Sünkler, S.; Lewandowski, D.: How relevant is the long tail? : a relevance assessment study on million short (2016) 0.01 
    0.009443258 = product of:
  0.018886516 = sum of:
    0.018886516 = product of:
      0.03777303 = sum of:
        0.03777303 = weight(_text_:p in 3144) [ClassicSimilarity], result of:
          0.03777303 = score(doc=3144,freq=4.0), product of:
            0.13447173 = queryWeight, product of:
              3.5955126 = idf(docFreq=3298, maxDocs=44218)
              0.037399877 = queryNorm
            0.28089944 = fieldWeight in 3144, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.5955126 = idf(docFreq=3298, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3144)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
  4. Mettrop, W.; Nieuwenhuysen, P.: Internet search engines : fluctuations in document accessibility (2001) 0.01 
    0.006677392 = product of:
  0.013354784 = sum of:
    0.013354784 = product of:
      0.026709568 = sum of:
        0.026709568 = weight(_text_:p in 4481) [ClassicSimilarity], result of:
          0.026709568 = score(doc=4481,freq=2.0), product of:
            0.13447173 = queryWeight, product of:
              3.5955126 = idf(docFreq=3298, maxDocs=44218)
              0.037399877 = queryNorm
            0.19862589 = fieldWeight in 4481, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5955126 = idf(docFreq=3298, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4481)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Authors

Years

Languages

Types