Search (5 results, page 1 of 1)

  • × theme_ss:"Retrievalalgorithmen"
  • × theme_ss:"Suchmaschinen"
  • × type_ss:"a"
  1. Kanaeva, Z.: Ranking: Google und CiteSeer (2005) 0.07
    0.070571356 = product of:
      0.14114271 = sum of:
        0.14114271 = sum of:
          0.09866865 = weight(_text_:z in 3276) [ClassicSimilarity], result of:
            0.09866865 = score(doc=3276,freq=2.0), product of:
              0.23903055 = queryWeight, product of:
                5.337313 = idf(docFreq=577, maxDocs=44218)
                0.04478481 = queryNorm
              0.41278675 = fieldWeight in 3276, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.337313 = idf(docFreq=577, maxDocs=44218)
                0.0546875 = fieldNorm(doc=3276)
          0.042474065 = weight(_text_:22 in 3276) [ClassicSimilarity], result of:
            0.042474065 = score(doc=3276,freq=2.0), product of:
              0.15682878 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.04478481 = queryNorm
              0.2708308 = fieldWeight in 3276, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.0546875 = fieldNorm(doc=3276)
      0.5 = coord(1/2)
    
    Date
    20. 3.2005 16:23:22
  2. Behnert, C.; Plassmeier, K.; Borst, T.; Lewandowski, D.: Evaluierung von Rankingverfahren für bibliothekarische Informationssysteme (2019) 0.02
    0.024667162 = product of:
      0.049334325 = sum of:
        0.049334325 = product of:
          0.09866865 = sum of:
            0.09866865 = weight(_text_:z in 5023) [ClassicSimilarity], result of:
              0.09866865 = score(doc=5023,freq=2.0), product of:
                0.23903055 = queryWeight, product of:
                  5.337313 = idf(docFreq=577, maxDocs=44218)
                  0.04478481 = queryNorm
                0.41278675 = fieldWeight in 5023, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  5.337313 = idf(docFreq=577, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=5023)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Dieser Beitrag beschreibt eine Studie zur Entwicklung und Evaluierung von Rankingverfahren für bibliothekarische Informationssysteme. Dazu wurden mögliche Faktoren für das Relevanzranking ausgehend von den Verfahren in Websuchmaschinen identifiziert, auf den Bibliothekskontext übertragen und systematisch evaluiert. Mithilfe eines Testsystems, das auf dem ZBW-Informationsportal EconBiz und einer web-basierten Software zur Evaluierung von Suchsystemen aufsetzt, wurden verschiedene Relevanzfaktoren (z. B. Popularität in Verbindung mit Aktualität) getestet. Obwohl die getesteten Rankingverfahren auf einer theoretischen Ebene divers sind, konnten keine einheitlichen Verbesserungen gegenüber den Baseline-Rankings gemessen werden. Die Ergebnisse deuten darauf hin, dass eine Adaptierung des Rankings auf individuelle Nutzer bzw. Nutzungskontexte notwendig sein könnte, um eine höhere Performance zu erzielen.
  3. Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000) 0.02
    0.021237032 = product of:
      0.042474065 = sum of:
        0.042474065 = product of:
          0.08494813 = sum of:
            0.08494813 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
              0.08494813 = score(doc=3445,freq=2.0), product of:
                0.15682878 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04478481 = queryNorm
                0.5416616 = fieldWeight in 3445, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.109375 = fieldNorm(doc=3445)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    25. 8.2005 17:42:22
  4. Chen, Z.; Meng, X.; Fowler, R.H.; Zhu, B.: Real-time adaptive feature and document learning for Web search (2001) 0.02
    0.017619401 = product of:
      0.035238802 = sum of:
        0.035238802 = product of:
          0.070477605 = sum of:
            0.070477605 = weight(_text_:z in 5209) [ClassicSimilarity], result of:
              0.070477605 = score(doc=5209,freq=2.0), product of:
                0.23903055 = queryWeight, product of:
                  5.337313 = idf(docFreq=577, maxDocs=44218)
                  0.04478481 = queryNorm
                0.29484767 = fieldWeight in 5209, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  5.337313 = idf(docFreq=577, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=5209)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  5. Furner, J.: ¬A unifying model of document relatedness for hybrid search engines (2003) 0.01
    0.0091015855 = product of:
      0.018203171 = sum of:
        0.018203171 = product of:
          0.036406342 = sum of:
            0.036406342 = weight(_text_:22 in 2717) [ClassicSimilarity], result of:
              0.036406342 = score(doc=2717,freq=2.0), product of:
                0.15682878 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04478481 = queryNorm
                0.23214069 = fieldWeight in 2717, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2717)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    11. 9.2004 17:32:22