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
    0.002604728 = product of:
      0.020837825 = sum of:
        0.020837825 = weight(_text_:in in 2043) [ClassicSimilarity], result of:
          0.020837825 = score(doc=2043,freq=4.0), product of:
            0.061276253 = queryWeight, product of:
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.045047637 = queryNorm
            0.34006363 = fieldWeight in 2043, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.125 = fieldNorm(doc=2043)
      0.125 = coord(1/8)
    
  2. Kristensen, J.: Expanding end-users' query statements for free text searching with a search-aid thesaurus (1993) 0.00
    0.0015950638 = product of:
      0.012760511 = sum of:
        0.012760511 = weight(_text_:in in 6621) [ClassicSimilarity], result of:
          0.012760511 = score(doc=6621,freq=6.0), product of:
            0.061276253 = queryWeight, product of:
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.045047637 = queryNorm
            0.2082456 = fieldWeight in 6621, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.0625 = fieldNorm(doc=6621)
      0.125 = coord(1/8)
    
    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