Search (2 results, page 1 of 1)

  • × theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
  • × year_i:[1980 TO 1990}
  1. Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983) 0.00
    0.0032135681 = product of:
      0.03213568 = sum of:
        0.0064886296 = weight(_text_:in in 2134) [ClassicSimilarity], result of:
          0.0064886296 = score(doc=2134,freq=2.0), product of:
            0.030838965 = queryWeight, product of:
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.022671467 = queryNorm
            0.21040362 = fieldWeight in 2134, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.109375 = fieldNorm(doc=2134)
        0.0041453536 = weight(_text_:s in 2134) [ClassicSimilarity], result of:
          0.0041453536 = score(doc=2134,freq=2.0), product of:
            0.024649272 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.022671467 = queryNorm
            0.16817348 = fieldWeight in 2134, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.109375 = fieldNorm(doc=2134)
        0.021501696 = product of:
          0.04300339 = sum of:
            0.04300339 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
              0.04300339 = score(doc=2134,freq=2.0), product of:
                0.07939161 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.022671467 = 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)
      0.1 = coord(3/30)
    
    Date
    30. 3.2001 13:32:22
    Source
    Computer journal. 26(1983), S.239-246
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  2. Robertson, S.E.: On relevance weight estimation and query expansion (1986) 0.00
    5.063802E-4 = product of:
      0.007595703 = sum of:
        0.004634736 = weight(_text_:in in 3875) [ClassicSimilarity], result of:
          0.004634736 = score(doc=3875,freq=2.0), product of:
            0.030838965 = queryWeight, product of:
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.022671467 = queryNorm
            0.15028831 = fieldWeight in 3875, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.078125 = fieldNorm(doc=3875)
        0.0029609671 = weight(_text_:s in 3875) [ClassicSimilarity], result of:
          0.0029609671 = score(doc=3875,freq=2.0), product of:
            0.024649272 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.022671467 = queryNorm
            0.120123915 = fieldWeight in 3875, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.078125 = fieldNorm(doc=3875)
      0.06666667 = coord(2/30)
    
    Source
    Journal of documentation. 42(1986), S.182-188
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval