Search (1 results, page 1 of 1)

  • × author_ss:"DeVere, R."
  • × author_ss:"Walker, S."
  • × year_i:[1990 TO 2000}
  1. Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990) 0.02
    0.01551668 = product of:
      0.04655004 = sum of:
        0.007520625 = weight(_text_:e in 1816) [ClassicSimilarity], result of:
          0.007520625 = score(doc=1816,freq=2.0), product of:
            0.047356583 = queryWeight, product of:
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.03294669 = queryNorm
            0.15880844 = fieldWeight in 1816, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.43737 = idf(docFreq=28552, maxDocs=44218)
              0.078125 = fieldNorm(doc=1816)
        0.039029416 = weight(_text_:u in 1816) [ClassicSimilarity], result of:
          0.039029416 = score(doc=1816,freq=2.0), product of:
            0.107882105 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03294669 = queryNorm
            0.3617784 = fieldWeight in 1816, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.078125 = fieldNorm(doc=1816)
      0.33333334 = coord(2/6)
    
    Language
    e
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval