Search (2 results, page 1 of 1)

  • × theme_ss:"Retrievalstudien"
  • × year_i:[1970 TO 1980}
  1. Cooper, W.S.: ¬On selecting a measure of retrieval effectiveness, revisited (1973) 0.01
    0.01168689 = product of:
      0.058434453 = sum of:
        0.058434453 = weight(_text_:u in 1930) [ClassicSimilarity], result of:
          0.058434453 = score(doc=1930,freq=2.0), product of:
            0.13460001 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.041106213 = queryNorm
            0.43413407 = fieldWeight in 1930, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.09375 = fieldNorm(doc=1930)
      0.2 = coord(1/5)
    
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.191-204.
  2. Rijsbergen, C.J. van: ¬A test for the separation of relevant and non-relevant documents in experimental retrieval collections (1973) 0.00
    0.00445546 = product of:
      0.0222773 = sum of:
        0.0222773 = product of:
          0.0445546 = sum of:
            0.0445546 = weight(_text_:22 in 5002) [ClassicSimilarity], result of:
              0.0445546 = score(doc=5002,freq=2.0), product of:
                0.14394696 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.041106213 = queryNorm
                0.30952093 = fieldWeight in 5002, 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=5002)
          0.5 = coord(1/2)
      0.2 = coord(1/5)
    
    Date
    19. 3.1996 11:22:12