Search (1 results, page 1 of 1)

  • × author_ss:"Robertson, S.E."
  • × author_ss:"Walker, S."
  • × year_i:[1970 TO 1980}
  1. Robertson, S.E.; Walker, S.: Some simple effective approximations to the 2-Poisson molde for probabilisitc weighted retrieval (1979) 0.00 
    0.0011760591 = product of:
  0.010584532 = sum of:
    0.010584532 = weight(_text_:of in 1940) [ClassicSimilarity], result of:
      0.010584532 = score(doc=1940,freq=2.0), product of:
        0.061262865 = queryWeight, product of:
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.03917671 = queryNorm
        0.17277241 = fieldWeight in 1940, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.5637573 = idf(docFreq=25162, maxDocs=44218)
          0.078125 = fieldNorm(doc=1940)
  0.11111111 = coord(1/9)
    Source
    Journal of documentation. 35(1979), S.285-295 (???)