Search (5 results, page 1 of 1)

  • × author_ss:"Willett, P."
  • × theme_ss:"Retrievalalgorithmen"
  • × year_i:[1990 TO 2000}
  1. Al-Hawamdeh, S.; Smith, G.; Willett, P.; Vere, R. de: Using nearest-neighbour searching techniques to access full-text documents (1991) 0.00
    0.0019599048 = product of:
      0.0039198096 = sum of:
        0.0039198096 = product of:
          0.007839619 = sum of:
            0.007839619 = weight(_text_:s in 2300) [ClassicSimilarity], result of:
              0.007839619 = score(doc=2300,freq=4.0), product of:
                0.057684682 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.053056188 = queryNorm
                0.1359047 = fieldWeight in 2300, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0625 = fieldNorm(doc=2300)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Online review. 15(1991) nos.3/4, S.173-190
  2. Willett, P.: Best-match text retrieval (1993) 0.00
    0.0017323275 = product of:
      0.003464655 = sum of:
        0.003464655 = product of:
          0.00692931 = sum of:
            0.00692931 = weight(_text_:s in 7818) [ClassicSimilarity], result of:
              0.00692931 = score(doc=7818,freq=2.0), product of:
                0.057684682 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.053056188 = queryNorm
                0.120123915 = fieldWeight in 7818, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.078125 = fieldNorm(doc=7818)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Library and information briefings. 1993, no.49, S.1-11
  3. Jones, G.; Robertson, A.M.; Willett, P.: ¬An introduction to genetic algorithms and to their use in information retrieval (1994) 0.00
    0.001385862 = product of:
      0.002771724 = sum of:
        0.002771724 = product of:
          0.005543448 = sum of:
            0.005543448 = weight(_text_:s in 7415) [ClassicSimilarity], result of:
              0.005543448 = score(doc=7415,freq=2.0), product of:
                0.057684682 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.053056188 = queryNorm
                0.09609913 = fieldWeight in 7415, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0625 = fieldNorm(doc=7415)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Online and CD-ROM review. 18(1994) no.1, S.3-12
  4. Robertson, A.M.; Willett, P.: Use of genetic algorithms in information retrieval (1995) 0.00
    0.001385862 = product of:
      0.002771724 = sum of:
        0.002771724 = product of:
          0.005543448 = sum of:
            0.005543448 = weight(_text_:s in 2418) [ClassicSimilarity], result of:
              0.005543448 = score(doc=2418,freq=2.0), product of:
                0.057684682 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.053056188 = queryNorm
                0.09609913 = fieldWeight in 2418, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0625 = fieldNorm(doc=2418)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Pages
    63 S
  5. Robertson, M.; Willett, P.: ¬An upperbound to the performance of ranked output searching : optimal weighting of query terms using a genetic algorithms (1996) 0.00
    0.001385862 = product of:
      0.002771724 = sum of:
        0.002771724 = product of:
          0.005543448 = sum of:
            0.005543448 = weight(_text_:s in 6977) [ClassicSimilarity], result of:
              0.005543448 = score(doc=6977,freq=2.0), product of:
                0.057684682 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.053056188 = queryNorm
                0.09609913 = fieldWeight in 6977, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0625 = fieldNorm(doc=6977)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of documentation. 52(1996) no.4, S.405-420