Search (5 results, page 1 of 1)

  • × year_i:[1980 TO 1990}
  • × theme_ss:"Retrievalalgorithmen"
  1. Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983) 0.08
    0.08106862 = product of:
      0.16213724 = sum of:
        0.16213724 = sum of:
          0.07563405 = weight(_text_:u in 2134) [ClassicSimilarity], result of:
            0.07563405 = score(doc=2134,freq=2.0), product of:
              0.14932987 = queryWeight, product of:
                3.2744443 = idf(docFreq=4547, maxDocs=44218)
                0.045604642 = queryNorm
              0.50648975 = fieldWeight in 2134, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.2744443 = idf(docFreq=4547, maxDocs=44218)
                0.109375 = fieldNorm(doc=2134)
          0.08650319 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
            0.08650319 = score(doc=2134,freq=2.0), product of:
              0.1596997 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045604642 = queryNorm
              0.5416616 = fieldWeight in 2134, 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=2134)
      0.5 = coord(1/2)
    
    Date
    30. 3.2001 13:32:22
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  2. Voorhees, E.M.: Implementing agglomerative hierarchic clustering algorithms for use in document retrieval (1986) 0.02
    0.024715198 = product of:
      0.049430396 = sum of:
        0.049430396 = product of:
          0.09886079 = sum of:
            0.09886079 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
              0.09886079 = score(doc=402,freq=2.0), product of:
                0.1596997 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045604642 = queryNorm
                0.61904186 = fieldWeight in 402, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.125 = fieldNorm(doc=402)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Information processing and management. 22(1986) no.6, S.465-476
  3. Fuhr, N.: Ranking-Experimente mit gewichteter Indexierung (1986) 0.02
    0.018536398 = product of:
      0.037072796 = sum of:
        0.037072796 = product of:
          0.07414559 = sum of:
            0.07414559 = weight(_text_:22 in 58) [ClassicSimilarity], result of:
              0.07414559 = score(doc=58,freq=2.0), product of:
                0.1596997 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045604642 = queryNorm
                0.46428138 = fieldWeight in 58, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.09375 = fieldNorm(doc=58)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    14. 6.2015 22:12:44
  4. Fuhr, N.: Rankingexperimente mit gewichteter Indexierung (1986) 0.02
    0.018536398 = product of:
      0.037072796 = sum of:
        0.037072796 = product of:
          0.07414559 = sum of:
            0.07414559 = weight(_text_:22 in 2051) [ClassicSimilarity], result of:
              0.07414559 = score(doc=2051,freq=2.0), product of:
                0.1596997 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045604642 = queryNorm
                0.46428138 = fieldWeight in 2051, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.09375 = fieldNorm(doc=2051)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    14. 6.2015 22:12:56
  5. Salton, G.; Buckley, C.: Term-weighting approaches in automatic text retrieval (1988) 0.02
    0.016207296 = product of:
      0.032414593 = sum of:
        0.032414593 = product of:
          0.064829186 = sum of:
            0.064829186 = weight(_text_:u in 1938) [ClassicSimilarity], result of:
              0.064829186 = score(doc=1938,freq=2.0), product of:
                0.14932987 = queryWeight, product of:
                  3.2744443 = idf(docFreq=4547, maxDocs=44218)
                  0.045604642 = queryNorm
                0.43413407 = fieldWeight in 1938, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.2744443 = idf(docFreq=4547, maxDocs=44218)
                  0.09375 = fieldNorm(doc=1938)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.323-328.