Search (5 results, page 1 of 1)

  • × year_i:[1980 TO 1990}
  • × author_ss:"Robertson, S.E."
  1. Bovey, J.D.; Robertson, S.E.: ¬An algorithm for weighted searching on a Boolean system (1984) 0.00
    0.0043799505 = product of:
      0.013139851 = sum of:
        0.013139851 = weight(_text_:a in 788) [ClassicSimilarity], result of:
          0.013139851 = score(doc=788,freq=4.0), product of:
            0.05209492 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.045180224 = queryNorm
            0.25222903 = fieldWeight in 788, 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=788)
      0.33333334 = coord(1/3)
    
    Type
    a
  2. Robertson, S.E.: ¬The methodology of information retrieval experiment (1981) 0.00
    0.0035395343 = product of:
      0.010618603 = sum of:
        0.010618603 = weight(_text_:a in 3146) [ClassicSimilarity], result of:
          0.010618603 = score(doc=3146,freq=2.0), product of:
            0.05209492 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.045180224 = queryNorm
            0.20383182 = fieldWeight in 3146, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.125 = fieldNorm(doc=3146)
      0.33333334 = coord(1/3)
    
    Type
    a
  3. Robertson, S.E.: On relevance weight estimation and query expansion (1986) 0.00
    0.003128536 = product of:
      0.009385608 = sum of:
        0.009385608 = weight(_text_:a in 3875) [ClassicSimilarity], result of:
          0.009385608 = score(doc=3875,freq=4.0), product of:
            0.05209492 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.045180224 = queryNorm
            0.18016359 = fieldWeight in 3875, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.078125 = fieldNorm(doc=3875)
      0.33333334 = coord(1/3)
    
    Abstract
    A Bayesian argument is used to suggest modifications to the Robertson/Sparck Jones relevance weighting formula, to accomodate the addition to the query of terms taken from the relevant documents identified during the search
    Type
    a
  4. Robertson, S.E.; Thompson, C.L.: ¬An operational evaluation of weighting, ranking and relevance feedback via a front-end system (1987) 0.00
    0.0030970925 = product of:
      0.009291277 = sum of:
        0.009291277 = weight(_text_:a in 3858) [ClassicSimilarity], result of:
          0.009291277 = score(doc=3858,freq=2.0), product of:
            0.05209492 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.045180224 = queryNorm
            0.17835285 = fieldWeight in 3858, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.109375 = fieldNorm(doc=3858)
      0.33333334 = coord(1/3)
    
  5. Robertson, S.E.: Some recent theories and models in information retrieval (1980) 0.00
    0.002654651 = product of:
      0.007963953 = sum of:
        0.007963953 = weight(_text_:a in 1326) [ClassicSimilarity], result of:
          0.007963953 = score(doc=1326,freq=2.0), product of:
            0.05209492 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.045180224 = queryNorm
            0.15287387 = fieldWeight in 1326, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.09375 = fieldNorm(doc=1326)
      0.33333334 = coord(1/3)
    
    Type
    a