Search (1 results, page 1 of 1)

  • × author_ss:"Thompson, C.L."
  • × author_ss:"Robertson, S.E."
  1. Robertson, S.E.; Thompson, C.L.: ¬An operational evaluation of weighting, ranking and relevance feedback via a front-end system (1987) 0.00
    0.002688897 = product of:
      0.037644558 = sum of:
        0.037644558 = weight(_text_:system in 3858) [ClassicSimilarity], result of:
          0.037644558 = score(doc=3858,freq=2.0), product of:
            0.07727166 = queryWeight, product of:
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.02453417 = queryNorm
            0.4871716 = fieldWeight in 3858, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.1495528 = idf(docFreq=5152, maxDocs=44218)
              0.109375 = fieldNorm(doc=3858)
      0.071428575 = coord(1/14)