Search (2 results, page 1 of 1)

  • × theme_ss:"Retrievalstudien"
  • × year_i:[1970 TO 1980}
  1. Rijsbergen, C.J. van: ¬A test for the separation of relevant and non-relevant documents in experimental retrieval collections (1973) 0.01
    0.014666058 = product of:
      0.058664232 = sum of:
        0.058664232 = product of:
          0.08799635 = sum of:
            0.044196967 = weight(_text_:29 in 5002) [ClassicSimilarity], result of:
              0.044196967 = score(doc=5002,freq=2.0), product of:
                0.14214782 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.040409453 = queryNorm
                0.31092256 = fieldWeight in 5002, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.0625 = fieldNorm(doc=5002)
            0.04379938 = weight(_text_:22 in 5002) [ClassicSimilarity], result of:
              0.04379938 = score(doc=5002,freq=2.0), product of:
                0.14150701 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.040409453 = 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)
          0.6666667 = coord(2/3)
      0.25 = coord(1/4)
    
    Date
    19. 3.1996 11:22:12
    Source
    Journal of documentation. 29(1973) no.3, S.251-257
  2. Schabas, A.H.: ¬A comparative evaluation of the retrieval effectiveness of titles, Library of Congress Subject Headings and PRECIS strings for computer searching of UK MARC data (1979) 0.01
    0.0061683413 = product of:
      0.024673365 = sum of:
        0.024673365 = product of:
          0.04934673 = sum of:
            0.04934673 = weight(_text_:online in 5277) [ClassicSimilarity], result of:
              0.04934673 = score(doc=5277,freq=2.0), product of:
                0.1226387 = queryWeight, product of:
                  3.0349014 = idf(docFreq=5778, maxDocs=44218)
                  0.040409453 = queryNorm
                0.40237486 = fieldWeight in 5277, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.0349014 = idf(docFreq=5778, maxDocs=44218)
                  0.09375 = fieldNorm(doc=5277)
          0.5 = coord(1/2)
      0.25 = coord(1/4)
    
    Theme
    Verbale Doksprachen im Online-Retrieval

Types