Search (2 results, page 1 of 1)

  • × author_ss:"Kristensen, J."
  • × theme_ss:"Volltextretrieval"
  1. Kristensen, J.; Järvelin, K.: ¬The effectiveness of a searching thesaurus in free-text searching in a full-text database (1990) 0.00
    0.0046871896 = product of:
      0.009374379 = sum of:
        0.009374379 = product of:
          0.018748758 = sum of:
            0.018748758 = weight(_text_:a in 2043) [ClassicSimilarity], result of:
              0.018748758 = score(doc=2043,freq=6.0), product of:
                0.053105544 = queryWeight, product of:
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.046056706 = queryNorm
                0.3530471 = fieldWeight in 2043, product of:
                  2.4494898 = tf(freq=6.0), with freq of:
                    6.0 = termFreq=6.0
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.125 = fieldNorm(doc=2043)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    a
  2. Kristensen, J.: Expanding end-users' query statements for free text searching with a search-aid thesaurus (1993) 0.00
    0.0035799001 = product of:
      0.0071598003 = sum of:
        0.0071598003 = product of:
          0.014319601 = sum of:
            0.014319601 = weight(_text_:a in 6621) [ClassicSimilarity], result of:
              0.014319601 = score(doc=6621,freq=14.0), product of:
                0.053105544 = queryWeight, product of:
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.046056706 = queryNorm
                0.26964417 = fieldWeight in 6621, product of:
                  3.7416575 = tf(freq=14.0), with freq of:
                    14.0 = termFreq=14.0
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.0625 = fieldNorm(doc=6621)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Tests the effectiveness of a thesaurus as a search-aid in free text searching of a full text database. A set of queries was searched against a large full text database of newspaper articles. The thesaurus contained equivalence, hierarchical and associative relationships. Each query was searched in five modes: basic search, synonym search, narrower term search, related term search, and union of all previous searches. The searches were analyzed in terms of relative recall and precision
    Type
    a