Search (1 results, page 1 of 1)

  • × author_ss:"Lancaster, F.W."
  • × type_ss:"a"
  • × year_i:[2000 TO 2010}
  1. Lancaster, F.W.: Precision and recall (2009) 0.01
    0.006866273 = product of:
      0.027465092 = sum of:
        0.027465092 = weight(_text_:information in 3866) [ClassicSimilarity], result of:
          0.027465092 = score(doc=3866,freq=8.0), product of:
            0.08850355 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.050415643 = queryNorm
            0.3103276 = fieldWeight in 3866, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.0625 = fieldNorm(doc=3866)
      0.25 = coord(1/4)
    
    Abstract
    F.W. Lancaster's work has been immensely influential in library and information science. He has written on indexing and information system evaluation, and has been looked to as a pioneer in many areas. Here he describes precision and recall, the two most fundamental and widespread measures of information retrieval effectiveness.
    Source
    Encyclopedia of library and information sciences. 3rd ed. Ed.: M.J. Bates