Search (7 results, page 1 of 1)

  • × author_ss:"Robertson, S.E."
  1. Robertson, S.E.: Indexing theory and retrieval effectiveness (1979) 0.02
    0.018542625 = product of:
      0.055627875 = sum of:
        0.055627875 = product of:
          0.16688362 = sum of:
            0.16688362 = weight(_text_:theory in 5175) [ClassicSimilarity], result of:
              0.16688362 = score(doc=5175,freq=2.0), product of:
                0.18161562 = queryWeight, product of:
                  4.1583924 = idf(docFreq=1878, maxDocs=44218)
                  0.04367448 = queryNorm
                0.9188836 = fieldWeight in 5175, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.1583924 = idf(docFreq=1878, maxDocs=44218)
                  0.15625 = fieldNorm(doc=5175)
          0.33333334 = coord(1/3)
      0.33333334 = coord(1/3)
    
  2. Robertson, S.E.: Some recent theories and models in information retrieval (1980) 0.01
    0.011125575 = product of:
      0.033376724 = sum of:
        0.033376724 = product of:
          0.10013017 = sum of:
            0.10013017 = weight(_text_:theory in 1326) [ClassicSimilarity], result of:
              0.10013017 = score(doc=1326,freq=2.0), product of:
                0.18161562 = queryWeight, product of:
                  4.1583924 = idf(docFreq=1878, maxDocs=44218)
                  0.04367448 = queryNorm
                0.55133015 = fieldWeight in 1326, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.1583924 = idf(docFreq=1878, maxDocs=44218)
                  0.09375 = fieldNorm(doc=1326)
          0.33333334 = coord(1/3)
      0.33333334 = coord(1/3)
    
    Source
    Theory and application of information research. Proc. of the 2nd Int. Research Forum on Information Science, 3.-6.8.1977, Copenhagen. Ed.: O. Harbo u. L. Kajberg
  3. Sparck Jones, K.; Walker, S.; Robertson, S.E.: ¬A probabilistic model of information retrieval : development and comparative experiments - part 1 (2000) 0.01
    0.0079613365 = product of:
      0.02388401 = sum of:
        0.02388401 = product of:
          0.071652025 = sum of:
            0.071652025 = weight(_text_:29 in 4181) [ClassicSimilarity], result of:
              0.071652025 = score(doc=4181,freq=2.0), product of:
                0.15363316 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.04367448 = queryNorm
                0.46638384 = fieldWeight in 4181, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.09375 = fieldNorm(doc=4181)
          0.33333334 = coord(1/3)
      0.33333334 = coord(1/3)
    
    Date
    27.12.2007 19:27:29
  4. Robertson, S.E.: Theories and models in information retrieval (1977) 0.01
    0.00741705 = product of:
      0.02225115 = sum of:
        0.02225115 = product of:
          0.06675345 = sum of:
            0.06675345 = weight(_text_:theory in 1844) [ClassicSimilarity], result of:
              0.06675345 = score(doc=1844,freq=2.0), product of:
                0.18161562 = queryWeight, product of:
                  4.1583924 = idf(docFreq=1878, maxDocs=44218)
                  0.04367448 = queryNorm
                0.36755344 = fieldWeight in 1844, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.1583924 = idf(docFreq=1878, maxDocs=44218)
                  0.0625 = fieldNorm(doc=1844)
          0.33333334 = coord(1/3)
      0.33333334 = coord(1/3)
    
    Abstract
    This paper is concerned with recent work in the theory of information retrieval. More particularly, it is concerned with theories which tackle the problem of retrieval performance, in a sense which will be explained. The aim is not an exhaustive survey of such work; rather it is an analysis and synthesis of those contributions which I feel to be important or find interesting
  5. Robertson, S.E.; Sparck Jones, K.: Relevance weighting of search terms (1976) 0.01
    0.00741705 = product of:
      0.02225115 = sum of:
        0.02225115 = product of:
          0.06675345 = sum of:
            0.06675345 = weight(_text_:theory in 71) [ClassicSimilarity], result of:
              0.06675345 = score(doc=71,freq=2.0), product of:
                0.18161562 = queryWeight, product of:
                  4.1583924 = idf(docFreq=1878, maxDocs=44218)
                  0.04367448 = queryNorm
                0.36755344 = fieldWeight in 71, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  4.1583924 = idf(docFreq=1878, maxDocs=44218)
                  0.0625 = fieldNorm(doc=71)
          0.33333334 = coord(1/3)
      0.33333334 = coord(1/3)
    
    Abstract
    Examines statistical techniques for exploiting relevance information to weight search terms. These techniques are presented as a natural extension of weighting methods using information about the distribution of index terms in documents in general. A series of relevance weighting functions is derived and is justified by theoretical considerations. In particular, it is shown that specific weighted search methods are implied by a general probabilistic theory of retrieval. Different applications of relevance weighting are illustrated by experimental results for test collections
  6. MacFarlane, A.; Robertson, S.E.; McCann, J.A.: Parallel computing for passage retrieval (2004) 0.01
    0.005259813 = product of:
      0.015779437 = sum of:
        0.015779437 = product of:
          0.04733831 = sum of:
            0.04733831 = weight(_text_:22 in 5108) [ClassicSimilarity], result of:
              0.04733831 = score(doc=5108,freq=2.0), product of:
                0.15294059 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04367448 = queryNorm
                0.30952093 = fieldWeight in 5108, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0625 = fieldNorm(doc=5108)
          0.33333334 = coord(1/3)
      0.33333334 = coord(1/3)
    
    Date
    20. 1.2007 18:30:22
  7. Vechtomova, O.; Robertson, S.E.: ¬A domain-independent approach to finding related entities (2012) 0.00
    0.0039806683 = product of:
      0.011942005 = sum of:
        0.011942005 = product of:
          0.035826012 = sum of:
            0.035826012 = weight(_text_:29 in 2733) [ClassicSimilarity], result of:
              0.035826012 = score(doc=2733,freq=2.0), product of:
                0.15363316 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.04367448 = queryNorm
                0.23319192 = fieldWeight in 2733, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2733)
          0.33333334 = coord(1/3)
      0.33333334 = coord(1/3)
    
    Date
    27. 1.2016 18:44:29