Search (3 results, page 1 of 1)

  • × author_ss:"Rijsbergen, C.J. van"
  • × theme_ss:"Retrievalalgorithmen"
  1. Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983) 0.06
    0.058021847 = product of:
      0.116043694 = sum of:
        0.116043694 = sum of:
          0.015427233 = weight(_text_:a in 2134) [ClassicSimilarity], result of:
            0.015427233 = score(doc=2134,freq=4.0), product of:
              0.06116359 = queryWeight, product of:
                1.153047 = idf(docFreq=37942, maxDocs=44218)
                0.053045183 = queryNorm
              0.25222903 = fieldWeight in 2134, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                1.153047 = idf(docFreq=37942, maxDocs=44218)
                0.109375 = fieldNorm(doc=2134)
          0.10061646 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
            0.10061646 = score(doc=2134,freq=2.0), product of:
              0.1857552 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.053045183 = queryNorm
              0.5416616 = fieldWeight in 2134, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.109375 = fieldNorm(doc=2134)
      0.5 = coord(1/2)
    
    Date
    30. 3.2001 13:32:22
    Type
    a
  2. Rijsbergen, C.J. van: ¬A fast hierarchic clustering algorithm (1970) 0.00
    0.0044077807 = product of:
      0.008815561 = sum of:
        0.008815561 = product of:
          0.017631123 = sum of:
            0.017631123 = weight(_text_:a in 3300) [ClassicSimilarity], result of:
              0.017631123 = score(doc=3300,freq=4.0), product of:
                0.06116359 = queryWeight, product of:
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.053045183 = queryNorm
                0.28826174 = fieldWeight in 3300, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.125 = fieldNorm(doc=3300)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    a
  3. Sembok, T.M.T.; Rijsbergen, C.J. van: IMAGING: a relevant feedback retrieval with nearest neighbour clusters (1994) 0.00
    0.0031167713 = product of:
      0.0062335427 = sum of:
        0.0062335427 = product of:
          0.012467085 = sum of:
            0.012467085 = weight(_text_:a in 1071) [ClassicSimilarity], result of:
              0.012467085 = score(doc=1071,freq=8.0), product of:
                0.06116359 = queryWeight, product of:
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.053045183 = queryNorm
                0.20383182 = fieldWeight in 1071, product of:
                  2.828427 = tf(freq=8.0), with freq of:
                    8.0 = termFreq=8.0
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.0625 = fieldNorm(doc=1071)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Reports on a study to implement and evaluate imaging retrieval as a relevance feedback retrieval technique with nearest neighbour clusters. Results obtained from experiments show the viability and validity of this strategy and support it as something worth further investigation
    Type
    a