Search (2 results, page 1 of 1)

  • × author_ss:"Walker, S."
  • × theme_ss:"OPAC"
  • × type_ss:"r"
  1. Walker, S.; DeVere, R.: Improving subject retrieval in online catalogues : T.2: Relevance feedback and query expansion (1990) 0.01
    0.005227756 = product of:
      0.03659429 = sum of:
        0.03659429 = product of:
          0.091485724 = sum of:
            0.051786967 = weight(_text_:retrieval in 1816) [ClassicSimilarity], result of:
              0.051786967 = score(doc=1816,freq=4.0), product of:
                0.109568894 = queryWeight, product of:
                  3.024915 = idf(docFreq=5836, maxDocs=44218)
                  0.03622214 = queryNorm
                0.47264296 = fieldWeight in 1816, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.024915 = idf(docFreq=5836, maxDocs=44218)
                  0.078125 = fieldNorm(doc=1816)
            0.03969876 = weight(_text_:system in 1816) [ClassicSimilarity], result of:
              0.03969876 = score(doc=1816,freq=2.0), product of:
                0.11408355 = queryWeight, product of:
                  3.1495528 = idf(docFreq=5152, maxDocs=44218)
                  0.03622214 = queryNorm
                0.3479797 = fieldWeight in 1816, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.1495528 = idf(docFreq=5152, maxDocs=44218)
                  0.078125 = fieldNorm(doc=1816)
          0.4 = coord(2/5)
      0.14285715 = coord(1/7)
    
    Content
    1. Introduction // 2. Query modification through relevance feedback // 3. System design & description 4. Evaluation // 5. Analysis & results // 6. Conclusions and recommendations
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  2. Walker, S.; Jones, R.M.: Improving subject retrieval in online catalogues : T.1: Stemming, automatic spelling correction and cross-reference tables (1987) 0.00
    0.0020714786 = product of:
      0.01450035 = sum of:
        0.01450035 = product of:
          0.07250175 = sum of:
            0.07250175 = weight(_text_:retrieval in 2141) [ClassicSimilarity], result of:
              0.07250175 = score(doc=2141,freq=4.0), product of:
                0.109568894 = queryWeight, product of:
                  3.024915 = idf(docFreq=5836, maxDocs=44218)
                  0.03622214 = queryNorm
                0.6617001 = fieldWeight in 2141, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.024915 = idf(docFreq=5836, maxDocs=44218)
                  0.109375 = fieldNorm(doc=2141)
          0.2 = coord(1/5)
      0.14285715 = coord(1/7)
    
    Theme
    Verbale Doksprachen im Online-Retrieval