Search (3 results, page 1 of 1)

  • × author_ss:"Cleverdon, C.W."
  • × year_i:[1970 TO 1980}
  1. Cleverdon, C.W.: Design and evaluation of information systems (1971) 0.01 
    0.011703481 = product of:
  0.029258702 = sum of:
    0.011086997 = weight(_text_:a in 248) [ClassicSimilarity], result of:
      0.011086997 = score(doc=248,freq=2.0), product of:
        0.054392863 = queryWeight, product of:
          1.153047 = idf(docFreq=37942, maxDocs=44218)
          0.047173154 = queryNorm
        0.20383182 = fieldWeight in 248, 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=248)
    0.018171705 = product of:
      0.03634341 = sum of:
        0.03634341 = weight(_text_:information in 248) [ClassicSimilarity], result of:
          0.03634341 = score(doc=248,freq=4.0), product of:
            0.08281143 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.047173154 = queryNorm
            0.43886948 = fieldWeight in 248, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.125 = fieldNorm(doc=248)
      0.5 = coord(1/2)
  0.4 = coord(2/5)
    Source
    Annual review of information science and technology. 6(1971), S.41-74
    Type
    a
  2. Cleverdon, C.W.: Evaluation tests of information retrieval systems (1970) 0.01 
    0.0095745325 = product of:
  0.023936331 = sum of:
    0.011086997 = weight(_text_:a in 2272) [ClassicSimilarity], result of:
      0.011086997 = score(doc=2272,freq=2.0), product of:
        0.054392863 = queryWeight, product of:
          1.153047 = idf(docFreq=37942, maxDocs=44218)
          0.047173154 = queryNorm
        0.20383182 = fieldWeight in 2272, 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=2272)
    0.012849336 = product of:
      0.025698671 = sum of:
        0.025698671 = weight(_text_:information in 2272) [ClassicSimilarity], result of:
          0.025698671 = score(doc=2272,freq=2.0), product of:
            0.08281143 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.047173154 = queryNorm
            0.3103276 = fieldWeight in 2272, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.125 = fieldNorm(doc=2272)
      0.5 = coord(1/2)
  0.4 = coord(2/5)
    Type
    a
  3. Cleverdon, C.W.: On the inverse relationship of recall and precision (1972) 0.00 
    0.0022173994 = product of:
  0.011086997 = sum of:
    0.011086997 = weight(_text_:a in 1843) [ClassicSimilarity], result of:
      0.011086997 = score(doc=1843,freq=2.0), product of:
        0.054392863 = queryWeight, product of:
          1.153047 = idf(docFreq=37942, maxDocs=44218)
          0.047173154 = queryNorm
        0.20383182 = fieldWeight in 1843, 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=1843)
  0.2 = coord(1/5)
    Type
    a