Search (5 results, page 1 of 1)

  • × author_ss:"Bollmann, P."
  • × year_i:[1980 TO 1990}
  1. Raghavan, V.V.; Jung, G.S.; Bollmann, P.: ¬A critical investigation of recall and precision as measures of retrieval system performance (1989) 0.00 
    0.0033143433 = product of:
  0.0066286866 = sum of:
    0.0066286866 = product of:
      0.013257373 = sum of:
        0.013257373 = weight(_text_:a in 3606) [ClassicSimilarity], result of:
          0.013257373 = score(doc=3606,freq=12.0), product of:
            0.053105544 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.046056706 = queryNorm
            0.24964198 = fieldWeight in 3606, product of:
              3.4641016 = tf(freq=12.0), with freq of:
                12.0 = termFreq=12.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=3606)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Recall and precision are often used to evaluate the effectiveness of information retrieval systems. However, when the retrieval results are weakly ordered, in the sense that several documents have an identical retrieval status value with respect to a query, some prohabilistic notion of precision has to be introduced. Provides a comparative analysis of methods available for defining precision in a prohabilistic sense and to promote a better understanding of the various issues involved in retrieval performance evaluation.
    Type
    a
  2. Bollmann, P.: Probleme des Messens und Bewertens beim Information-Retrieval (1982) 0.00 
    0.0023678814 = product of:
  0.0047357627 = sum of:
    0.0047357627 = product of:
      0.009471525 = sum of:
        0.009471525 = weight(_text_:a in 427) [ClassicSimilarity], result of:
          0.009471525 = score(doc=427,freq=2.0), product of:
            0.053105544 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.046056706 = queryNorm
            0.17835285 = fieldWeight in 427, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.109375 = fieldNorm(doc=427)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Type
    a
  3. Bollmann, P.; Jochum, F.; Weissmann, V.: Experimentelle Untersuchung von Ranking-Verfahren (1986) 0.00 
    0.0023678814 = product of:
  0.0047357627 = sum of:
    0.0047357627 = product of:
      0.009471525 = sum of:
        0.009471525 = weight(_text_:a in 478) [ClassicSimilarity], result of:
          0.009471525 = score(doc=478,freq=2.0), product of:
            0.053105544 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.046056706 = queryNorm
            0.17835285 = fieldWeight in 478, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.109375 = fieldNorm(doc=478)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Type
    a
  4. Bollmann, P.; Konrad, E.; Richardt, B.; Zuse, H.: Experimentelle Überprüfung der Clusterhypothese mit dem Information-Retrieval-Methodebanksystem FAKYR (1983) 0.00 
    0.0020296127 = product of:
  0.0040592253 = sum of:
    0.0040592253 = product of:
      0.008118451 = sum of:
        0.008118451 = weight(_text_:a in 444) [ClassicSimilarity], result of:
          0.008118451 = score(doc=444,freq=2.0), product of:
            0.053105544 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.046056706 = queryNorm
            0.15287387 = fieldWeight in 444, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.09375 = fieldNorm(doc=444)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Type
    a
  5. Bollmann, P.; Cherniavsky, V.S.: Probleme der Bewertung von Information-Retrieval-Systemen (1980) 0.00 
    0.001353075 = product of:
  0.00270615 = sum of:
    0.00270615 = product of:
      0.0054123 = sum of:
        0.0054123 = weight(_text_:a in 5495) [ClassicSimilarity], result of:
          0.0054123 = score(doc=5495,freq=2.0), product of:
            0.053105544 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.046056706 = queryNorm
            0.10191591 = fieldWeight in 5495, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=5495)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Type
    a

Authors

Languages