Search (1 results, page 1 of 1)

  • × author_ss:"Eastman, C.M."
  • × language_ss:"e"
  • × theme_ss:"Konzeption und Anwendung des Prinzips Thesaurus"
  1. Eastman, C.M.: Overlaps in postings to thesaurus terms : a preliminary study (1988) 0.02
    0.022215564 = product of:
      0.044431128 = sum of:
        0.044431128 = sum of:
          0.008669697 = weight(_text_:a in 3555) [ClassicSimilarity], result of:
            0.008669697 = score(doc=3555,freq=10.0), product of:
              0.043477926 = queryWeight, product of:
                1.153047 = idf(docFreq=37942, maxDocs=44218)
                0.037706986 = queryNorm
              0.19940455 = fieldWeight in 3555, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                1.153047 = idf(docFreq=37942, maxDocs=44218)
                0.0546875 = fieldNorm(doc=3555)
          0.03576143 = weight(_text_:22 in 3555) [ClassicSimilarity], result of:
            0.03576143 = score(doc=3555,freq=2.0), product of:
              0.13204344 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.037706986 = queryNorm
              0.2708308 = fieldWeight in 3555, 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=3555)
      0.5 = coord(1/2)
    
    Abstract
    The patterns of overlap between terms which are closely related in a thesaurus are considered. The relationships considered are parent/child, in which one term is a broader term of the other, and sibling in which to 2 terms share the same broader term. The patterns of overlap observed in the MeSH thesaurus with respect to selected MEDLINE postings are examined. The implications of the overlap patterns are discussed, in particular, the impact of the overlap patterns on the potential effectiveness of a proposed algorithm for handling negation is considered.
    Date
    25.12.1995 22:52:34
    Type
    a