Document (#16047)

Author
Robertson, M.
Willett, P.
Title
¬An upperbound to the performance of ranked output searching : optimal weighting of query terms using a genetic algorithms
Source
Journal of documentation. 52(1996) no.4, S.405-420
Year
1996
Abstract
Describes the development of a genetic algorithm (GA) for the assignment of weights to query terms in a ranked output document retrieval system. The GA involves a fitness function that is based on full relevance information, and the rankings resulting from the use of these weights are compared with the Robertson-Sparck Jones F4 retrospective relevance weight
Theme
Retrievalalgorithmen

Similar documents (author)

  1. Robertson, A.M.; Willett, P.: Retrieval techniques for historical English text : searching the sixteenth and seventeenth century titles in the Catalogue of Caterbury Cathedral Library using spelling-correction methods (1992) 5.43
    5.4297447 = sum of:
      5.4297447 = sum of:
        2.3360507 = weight(author_txt:robertson in 4208) [ClassicSimilarity], result of:
          2.3360507 = score(doc=4208,freq=1.0), product of:
            0.638314 = queryWeight, product of:
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.08720803 = queryNorm
            3.6597204 = fieldWeight in 4208, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.5 = fieldNorm(doc=4208)
        3.093694 = weight(author_txt:willett in 4208) [ClassicSimilarity], result of:
          3.093694 = score(doc=4208,freq=1.0), product of:
            0.7697761 = queryWeight, product of:
              1.0981585 = boost
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.08720803 = queryNorm
            4.018953 = fieldWeight in 4208, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.5 = fieldNorm(doc=4208)
    
  2. Robertson, A.M.; Willett, P.: Generation of equifrequent groups of words using a genetic algorithm (1994) 5.43
    5.4297447 = sum of:
      5.4297447 = sum of:
        2.3360507 = weight(author_txt:robertson in 8157) [ClassicSimilarity], result of:
          2.3360507 = score(doc=8157,freq=1.0), product of:
            0.638314 = queryWeight, product of:
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.08720803 = queryNorm
            3.6597204 = fieldWeight in 8157, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.5 = fieldNorm(doc=8157)
        3.093694 = weight(author_txt:willett in 8157) [ClassicSimilarity], result of:
          3.093694 = score(doc=8157,freq=1.0), product of:
            0.7697761 = queryWeight, product of:
              1.0981585 = boost
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.08720803 = queryNorm
            4.018953 = fieldWeight in 8157, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.5 = fieldNorm(doc=8157)
    
  3. Robertson, A.M.; Willett, P.: Identification of word-variants in historical text databases : report for the period October 1990 to September 1992 (1994) 5.43
    5.4297447 = sum of:
      5.4297447 = sum of:
        2.3360507 = weight(author_txt:robertson in 1007) [ClassicSimilarity], result of:
          2.3360507 = score(doc=1007,freq=1.0), product of:
            0.638314 = queryWeight, product of:
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.08720803 = queryNorm
            3.6597204 = fieldWeight in 1007, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.5 = fieldNorm(doc=1007)
        3.093694 = weight(author_txt:willett in 1007) [ClassicSimilarity], result of:
          3.093694 = score(doc=1007,freq=1.0), product of:
            0.7697761 = queryWeight, product of:
              1.0981585 = boost
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.08720803 = queryNorm
            4.018953 = fieldWeight in 1007, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.5 = fieldNorm(doc=1007)
    
  4. Robertson, A.M.; Willett, P.: Use of genetic algorithms in information retrieval (1995) 5.43
    5.4297447 = sum of:
      5.4297447 = sum of:
        2.3360507 = weight(author_txt:robertson in 2486) [ClassicSimilarity], result of:
          2.3360507 = score(doc=2486,freq=1.0), product of:
            0.638314 = queryWeight, product of:
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.08720803 = queryNorm
            3.6597204 = fieldWeight in 2486, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.5 = fieldNorm(doc=2486)
        3.093694 = weight(author_txt:willett in 2486) [ClassicSimilarity], result of:
          3.093694 = score(doc=2486,freq=1.0), product of:
            0.7697761 = queryWeight, product of:
              1.0981585 = boost
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.08720803 = queryNorm
            4.018953 = fieldWeight in 2486, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.5 = fieldNorm(doc=2486)
    
  5. Robertson, A.M.; Willett, P.: Applications of n-grams in textual information systems (1998) 5.43
    5.4297447 = sum of:
      5.4297447 = sum of:
        2.3360507 = weight(author_txt:robertson in 5715) [ClassicSimilarity], result of:
          2.3360507 = score(doc=5715,freq=1.0), product of:
            0.638314 = queryWeight, product of:
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.08720803 = queryNorm
            3.6597204 = fieldWeight in 5715, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.319441 = idf(docFreq=79, maxDocs=44421)
              0.5 = fieldNorm(doc=5715)
        3.093694 = weight(author_txt:willett in 5715) [ClassicSimilarity], result of:
          3.093694 = score(doc=5715,freq=1.0), product of:
            0.7697761 = queryWeight, product of:
              1.0981585 = boost
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.08720803 = queryNorm
            4.018953 = fieldWeight in 5715, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.037906 = idf(docFreq=38, maxDocs=44421)
              0.5 = fieldNorm(doc=5715)
    

Similar documents (content)

  1. Robertson, A.M.; Willett, P.: Use of genetic algorithms in information retrieval (1995) 0.92
    0.9220039 = sum of:
      0.9220039 = product of:
        1.7730845 = sum of:
          0.044758316 = weight(abstract_txt:full in 2486) [ClassicSimilarity], result of:
            0.044758316 = score(doc=2486,freq=1.0), product of:
              0.0830908 = queryWeight, product of:
                1.0660644 = boost
                4.9249606 = idf(docFreq=876, maxDocs=44421)
                0.015825838 = queryNorm
              0.53866756 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9249606 = idf(docFreq=876, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.06483303 = weight(abstract_txt:function in 2486) [ClassicSimilarity], result of:
            0.06483303 = score(doc=2486,freq=1.0), product of:
              0.10637379 = queryWeight, product of:
                1.2062138 = boost
                5.5724173 = idf(docFreq=458, maxDocs=44421)
                0.015825838 = queryNorm
              0.6094831 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5724173 = idf(docFreq=458, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.06939083 = weight(abstract_txt:algorithms in 2486) [ClassicSimilarity], result of:
            0.06939083 = score(doc=2486,freq=1.0), product of:
              0.11130256 = queryWeight, product of:
                1.233842 = boost
                5.7000527 = idf(docFreq=403, maxDocs=44421)
                0.015825838 = queryNorm
              0.62344325 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.7000527 = idf(docFreq=403, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.12050266 = weight(abstract_txt:algorithm in 2486) [ClassicSimilarity], result of:
            0.12050266 = score(doc=2486,freq=3.0), product of:
              0.11149646 = queryWeight, product of:
                1.2349163 = boost
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.015825838 = queryNorm
              1.0807756 = fieldWeight in 2486, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.091119684 = weight(abstract_txt:involves in 2486) [ClassicSimilarity], result of:
            0.091119684 = score(doc=2486,freq=1.0), product of:
              0.13346843 = queryWeight, product of:
                1.3511273 = boost
                6.2418823 = idf(docFreq=234, maxDocs=44421)
                0.015825838 = queryNorm
              0.6827059 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2418823 = idf(docFreq=234, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.15871604 = weight(abstract_txt:optimal in 2486) [ClassicSimilarity], result of:
            0.15871604 = score(doc=2486,freq=2.0), product of:
              0.15335843 = queryWeight, product of:
                1.4483076 = boost
                6.690832 = idf(docFreq=149, maxDocs=44421)
                0.015825838 = queryNorm
              1.0349352 = fieldWeight in 2486, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.690832 = idf(docFreq=149, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.12709431 = weight(abstract_txt:weighting in 2486) [ClassicSimilarity], result of:
            0.12709431 = score(doc=2486,freq=1.0), product of:
              0.1666177 = queryWeight, product of:
                1.5096197 = boost
                6.9740796 = idf(docFreq=112, maxDocs=44421)
                0.015825838 = queryNorm
              0.76278996 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.9740796 = idf(docFreq=112, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.049549144 = weight(abstract_txt:terms in 2486) [ClassicSimilarity], result of:
            0.049549144 = score(doc=2486,freq=1.0), product of:
              0.11203091 = queryWeight, product of:
                1.7506161 = boost
                4.043712 = idf(docFreq=2116, maxDocs=44421)
                0.015825838 = queryNorm
              0.442281 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.043712 = idf(docFreq=2116, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.21689667 = weight(abstract_txt:fitness in 2486) [ClassicSimilarity], result of:
            0.21689667 = score(doc=2486,freq=1.0), product of:
              0.23794267 = queryWeight, product of:
                1.8040274 = boost
                8.334172 = idf(docFreq=28, maxDocs=44421)
                0.015825838 = queryNorm
              0.9115501 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.334172 = idf(docFreq=28, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.11389974 = weight(abstract_txt:query in 2486) [ClassicSimilarity], result of:
            0.11389974 = score(doc=2486,freq=2.0), product of:
              0.15487652 = queryWeight, product of:
                2.0583289 = boost
                4.754492 = idf(docFreq=1039, maxDocs=44421)
                0.015825838 = queryNorm
              0.7354229 = fieldWeight in 2486, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.754492 = idf(docFreq=1039, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.089766145 = weight(abstract_txt:relevance in 2486) [ClassicSimilarity], result of:
            0.089766145 = score(doc=2486,freq=1.0), product of:
              0.16649024 = queryWeight, product of:
                2.1341078 = boost
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.015825838 = queryNorm
              0.5391676 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.28522784 = weight(abstract_txt:weights in 2486) [ClassicSimilarity], result of:
            0.28522784 = score(doc=2486,freq=1.0), product of:
              0.3598391 = queryWeight, product of:
                3.1374452 = boost
                7.2471204 = idf(docFreq=85, maxDocs=44421)
                0.015825838 = queryNorm
              0.7926538 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.2471204 = idf(docFreq=85, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
          0.3413302 = weight(abstract_txt:genetic in 2486) [ClassicSimilarity], result of:
            0.3413302 = score(doc=2486,freq=1.0), product of:
              0.405599 = queryWeight, product of:
                3.3309677 = boost
                7.694134 = idf(docFreq=54, maxDocs=44421)
                0.015825838 = queryNorm
              0.84154594 = fieldWeight in 2486, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.694134 = idf(docFreq=54, maxDocs=44421)
                0.109375 = fieldNorm(doc=2486)
        0.52 = coord(13/25)
    
  2. Petry, F.E.; Buckles, B.P.; Prabhu, D.: Fuzzy information retrieval using genetic algorithms and relevance feedback (1993) 0.50
    0.49678108 = sum of:
      0.49678108 = product of:
        1.3799474 = sum of:
          0.026387326 = weight(abstract_txt:performance in 7961) [ClassicSimilarity], result of:
            0.026387326 = score(doc=7961,freq=1.0), product of:
              0.07311156 = queryWeight, product of:
                4.619759 = idf(docFreq=1189, maxDocs=44421)
                0.015825838 = queryNorm
              0.36091867 = fieldWeight in 7961, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.619759 = idf(docFreq=1189, maxDocs=44421)
                0.078125 = fieldNorm(doc=7961)
          0.065491244 = weight(abstract_txt:function in 7961) [ClassicSimilarity], result of:
            0.065491244 = score(doc=7961,freq=2.0), product of:
              0.10637379 = queryWeight, product of:
                1.2062138 = boost
                5.5724173 = idf(docFreq=458, maxDocs=44421)
                0.015825838 = queryNorm
              0.6156709 = fieldWeight in 7961, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.5724173 = idf(docFreq=458, maxDocs=44421)
                0.078125 = fieldNorm(doc=7961)
          0.049694456 = weight(abstract_txt:algorithm in 7961) [ClassicSimilarity], result of:
            0.049694456 = score(doc=7961,freq=1.0), product of:
              0.11149646 = queryWeight, product of:
                1.2349163 = boost
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.015825838 = queryNorm
              0.44570434 = fieldWeight in 7961, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.078125 = fieldNorm(doc=7961)
          0.035392247 = weight(abstract_txt:terms in 7961) [ClassicSimilarity], result of:
            0.035392247 = score(doc=7961,freq=1.0), product of:
              0.11203091 = queryWeight, product of:
                1.7506161 = boost
                4.043712 = idf(docFreq=2116, maxDocs=44421)
                0.015825838 = queryNorm
              0.31591502 = fieldWeight in 7961, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.043712 = idf(docFreq=2116, maxDocs=44421)
                0.078125 = fieldNorm(doc=7961)
          0.26834002 = weight(abstract_txt:fitness in 7961) [ClassicSimilarity], result of:
            0.26834002 = score(doc=7961,freq=3.0), product of:
              0.23794267 = queryWeight, product of:
                1.8040274 = boost
                8.334172 = idf(docFreq=28, maxDocs=44421)
                0.015825838 = queryNorm
              1.1277508 = fieldWeight in 7961, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                8.334172 = idf(docFreq=28, maxDocs=44421)
                0.078125 = fieldNorm(doc=7961)
          0.11505611 = weight(abstract_txt:query in 7961) [ClassicSimilarity], result of:
            0.11505611 = score(doc=7961,freq=4.0), product of:
              0.15487652 = queryWeight, product of:
                2.0583289 = boost
                4.754492 = idf(docFreq=1039, maxDocs=44421)
                0.015825838 = queryNorm
              0.74288934 = fieldWeight in 7961, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.754492 = idf(docFreq=1039, maxDocs=44421)
                0.078125 = fieldNorm(doc=7961)
          0.12823734 = weight(abstract_txt:relevance in 7961) [ClassicSimilarity], result of:
            0.12823734 = score(doc=7961,freq=4.0), product of:
              0.16649024 = queryWeight, product of:
                2.1341078 = boost
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.015825838 = queryNorm
              0.77023935 = fieldWeight in 7961, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.078125 = fieldNorm(doc=7961)
          0.20373417 = weight(abstract_txt:weights in 7961) [ClassicSimilarity], result of:
            0.20373417 = score(doc=7961,freq=1.0), product of:
              0.3598391 = queryWeight, product of:
                3.1374452 = boost
                7.2471204 = idf(docFreq=85, maxDocs=44421)
                0.015825838 = queryNorm
              0.5661813 = fieldWeight in 7961, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.2471204 = idf(docFreq=85, maxDocs=44421)
                0.078125 = fieldNorm(doc=7961)
          0.48761457 = weight(abstract_txt:genetic in 7961) [ClassicSimilarity], result of:
            0.48761457 = score(doc=7961,freq=4.0), product of:
              0.405599 = queryWeight, product of:
                3.3309677 = boost
                7.694134 = idf(docFreq=54, maxDocs=44421)
                0.015825838 = queryNorm
              1.2022085 = fieldWeight in 7961, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                7.694134 = idf(docFreq=54, maxDocs=44421)
                0.078125 = fieldNorm(doc=7961)
        0.36 = coord(9/25)
    
  3. Robertson, S.E.: On relevance weight estimation and query expansion (1986) 0.43
    0.426267 = sum of:
      0.426267 = product of:
        1.5223821 = sum of:
          0.18156332 = weight(abstract_txt:weighting in 3874) [ClassicSimilarity], result of:
            0.18156332 = score(doc=3874,freq=1.0), product of:
              0.1666177 = queryWeight, product of:
                1.5096197 = boost
                6.9740796 = idf(docFreq=112, maxDocs=44421)
                0.015825838 = queryNorm
              1.0897 = fieldWeight in 3874, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.9740796 = idf(docFreq=112, maxDocs=44421)
                0.15625 = fieldNorm(doc=3874)
          0.25905704 = weight(abstract_txt:jones in 3874) [ClassicSimilarity], result of:
            0.25905704 = score(doc=3874,freq=1.0), product of:
              0.21117024 = queryWeight, product of:
                1.6995085 = boost
                7.85132 = idf(docFreq=46, maxDocs=44421)
                0.015825838 = queryNorm
              1.2267687 = fieldWeight in 3874, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.85132 = idf(docFreq=46, maxDocs=44421)
                0.15625 = fieldNorm(doc=3874)
          0.070784494 = weight(abstract_txt:terms in 3874) [ClassicSimilarity], result of:
            0.070784494 = score(doc=3874,freq=1.0), product of:
              0.11203091 = queryWeight, product of:
                1.7506161 = boost
                4.043712 = idf(docFreq=2116, maxDocs=44421)
                0.015825838 = queryNorm
              0.63183004 = fieldWeight in 3874, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.043712 = idf(docFreq=2116, maxDocs=44421)
                0.15625 = fieldNorm(doc=3874)
          0.35944933 = weight(abstract_txt:robertson in 3874) [ClassicSimilarity], result of:
            0.35944933 = score(doc=3874,freq=1.0), product of:
              0.2627005 = queryWeight, product of:
                1.8955595 = boost
                8.757029 = idf(docFreq=18, maxDocs=44421)
                0.015825838 = queryNorm
              1.3682857 = fieldWeight in 3874, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.757029 = idf(docFreq=18, maxDocs=44421)
                0.15625 = fieldNorm(doc=3874)
          0.40823442 = weight(abstract_txt:sparck in 3874) [ClassicSimilarity], result of:
            0.40823442 = score(doc=3874,freq=1.0), product of:
              0.28596234 = queryWeight, product of:
                1.9777045 = boost
                9.1365185 = idf(docFreq=12, maxDocs=44421)
                0.015825838 = queryNorm
              1.4275811 = fieldWeight in 3874, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.1365185 = idf(docFreq=12, maxDocs=44421)
                0.15625 = fieldNorm(doc=3874)
          0.11505611 = weight(abstract_txt:query in 3874) [ClassicSimilarity], result of:
            0.11505611 = score(doc=3874,freq=1.0), product of:
              0.15487652 = queryWeight, product of:
                2.0583289 = boost
                4.754492 = idf(docFreq=1039, maxDocs=44421)
                0.015825838 = queryNorm
              0.74288934 = fieldWeight in 3874, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.754492 = idf(docFreq=1039, maxDocs=44421)
                0.15625 = fieldNorm(doc=3874)
          0.12823734 = weight(abstract_txt:relevance in 3874) [ClassicSimilarity], result of:
            0.12823734 = score(doc=3874,freq=1.0), product of:
              0.16649024 = queryWeight, product of:
                2.1341078 = boost
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.015825838 = queryNorm
              0.77023935 = fieldWeight in 3874, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.15625 = fieldNorm(doc=3874)
        0.28 = coord(7/25)
    
  4. Smith, M.P.; Smith, M.: ¬The use of genetic programming to build Boolean queries for text retrieval through relevance feedback (1997) 0.36
    0.35844678 = sum of:
      0.35844678 = product of:
        0.99568546 = sum of:
          0.026387326 = weight(abstract_txt:performance in 1761) [ClassicSimilarity], result of:
            0.026387326 = score(doc=1761,freq=1.0), product of:
              0.07311156 = queryWeight, product of:
                4.619759 = idf(docFreq=1189, maxDocs=44421)
                0.015825838 = queryNorm
              0.36091867 = fieldWeight in 1761, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.619759 = idf(docFreq=1189, maxDocs=44421)
                0.078125 = fieldNorm(doc=1761)
          0.03197023 = weight(abstract_txt:full in 1761) [ClassicSimilarity], result of:
            0.03197023 = score(doc=1761,freq=1.0), product of:
              0.0830908 = queryWeight, product of:
                1.0660644 = boost
                4.9249606 = idf(docFreq=876, maxDocs=44421)
                0.015825838 = queryNorm
              0.38476256 = fieldWeight in 1761, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9249606 = idf(docFreq=876, maxDocs=44421)
                0.078125 = fieldNorm(doc=1761)
          0.04956488 = weight(abstract_txt:algorithms in 1761) [ClassicSimilarity], result of:
            0.04956488 = score(doc=1761,freq=1.0), product of:
              0.11130256 = queryWeight, product of:
                1.233842 = boost
                5.7000527 = idf(docFreq=403, maxDocs=44421)
                0.015825838 = queryNorm
              0.4453166 = fieldWeight in 1761, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.7000527 = idf(docFreq=403, maxDocs=44421)
                0.078125 = fieldNorm(doc=1761)
          0.049694456 = weight(abstract_txt:algorithm in 1761) [ClassicSimilarity], result of:
            0.049694456 = score(doc=1761,freq=1.0), product of:
              0.11149646 = queryWeight, product of:
                1.2349163 = boost
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.015825838 = queryNorm
              0.44570434 = fieldWeight in 1761, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.078125 = fieldNorm(doc=1761)
          0.050052192 = weight(abstract_txt:terms in 1761) [ClassicSimilarity], result of:
            0.050052192 = score(doc=1761,freq=2.0), product of:
              0.11203091 = queryWeight, product of:
                1.7506161 = boost
                4.043712 = idf(docFreq=2116, maxDocs=44421)
                0.015825838 = queryNorm
              0.44677126 = fieldWeight in 1761, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.043712 = idf(docFreq=2116, maxDocs=44421)
                0.078125 = fieldNorm(doc=1761)
          0.15492618 = weight(abstract_txt:fitness in 1761) [ClassicSimilarity], result of:
            0.15492618 = score(doc=1761,freq=1.0), product of:
              0.23794267 = queryWeight, product of:
                1.8040274 = boost
                8.334172 = idf(docFreq=28, maxDocs=44421)
                0.015825838 = queryNorm
              0.6511072 = fieldWeight in 1761, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.334172 = idf(docFreq=28, maxDocs=44421)
                0.078125 = fieldNorm(doc=1761)
          0.08135695 = weight(abstract_txt:query in 1761) [ClassicSimilarity], result of:
            0.08135695 = score(doc=1761,freq=2.0), product of:
              0.15487652 = queryWeight, product of:
                2.0583289 = boost
                4.754492 = idf(docFreq=1039, maxDocs=44421)
                0.015825838 = queryNorm
              0.52530205 = fieldWeight in 1761, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.754492 = idf(docFreq=1039, maxDocs=44421)
                0.078125 = fieldNorm(doc=1761)
          0.06411867 = weight(abstract_txt:relevance in 1761) [ClassicSimilarity], result of:
            0.06411867 = score(doc=1761,freq=1.0), product of:
              0.16649024 = queryWeight, product of:
                2.1341078 = boost
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.015825838 = queryNorm
              0.38511968 = fieldWeight in 1761, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.078125 = fieldNorm(doc=1761)
          0.48761457 = weight(abstract_txt:genetic in 1761) [ClassicSimilarity], result of:
            0.48761457 = score(doc=1761,freq=4.0), product of:
              0.405599 = queryWeight, product of:
                3.3309677 = boost
                7.694134 = idf(docFreq=54, maxDocs=44421)
                0.015825838 = queryNorm
              1.2022085 = fieldWeight in 1761, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                7.694134 = idf(docFreq=54, maxDocs=44421)
                0.078125 = fieldNorm(doc=1761)
        0.36 = coord(9/25)
    
  5. Lopez-Pujalte, C.; Guerrero Bote, V.P.; Moya-Anegón, F. de: Evaluation of the application of genetic algorithms to relevance feedback (2003) 0.26
    0.26253638 = sum of:
      0.26253638 = product of:
        0.9376299 = sum of:
          0.03364266 = weight(abstract_txt:compared in 3756) [ClassicSimilarity], result of:
            0.03364266 = score(doc=3756,freq=1.0), product of:
              0.085963875 = queryWeight, product of:
                1.0843388 = boost
                5.0093837 = idf(docFreq=805, maxDocs=44421)
                0.015825838 = queryNorm
              0.3913581 = fieldWeight in 3756, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.0093837 = idf(docFreq=805, maxDocs=44421)
                0.078125 = fieldNorm(doc=3756)
          0.046309307 = weight(abstract_txt:function in 3756) [ClassicSimilarity], result of:
            0.046309307 = score(doc=3756,freq=1.0), product of:
              0.10637379 = queryWeight, product of:
                1.2062138 = boost
                5.5724173 = idf(docFreq=458, maxDocs=44421)
                0.015825838 = queryNorm
              0.4353451 = fieldWeight in 3756, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5724173 = idf(docFreq=458, maxDocs=44421)
                0.078125 = fieldNorm(doc=3756)
          0.09912976 = weight(abstract_txt:algorithms in 3756) [ClassicSimilarity], result of:
            0.09912976 = score(doc=3756,freq=4.0), product of:
              0.11130256 = queryWeight, product of:
                1.233842 = boost
                5.7000527 = idf(docFreq=403, maxDocs=44421)
                0.015825838 = queryNorm
              0.8906332 = fieldWeight in 3756, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.7000527 = idf(docFreq=403, maxDocs=44421)
                0.078125 = fieldNorm(doc=3756)
          0.07027858 = weight(abstract_txt:algorithm in 3756) [ClassicSimilarity], result of:
            0.07027858 = score(doc=3756,freq=2.0), product of:
              0.11149646 = queryWeight, product of:
                1.2349163 = boost
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.015825838 = queryNorm
              0.63032115 = fieldWeight in 3756, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.7050157 = idf(docFreq=401, maxDocs=44421)
                0.078125 = fieldNorm(doc=3756)
          0.15492618 = weight(abstract_txt:fitness in 3756) [ClassicSimilarity], result of:
            0.15492618 = score(doc=3756,freq=1.0), product of:
              0.23794267 = queryWeight, product of:
                1.8040274 = boost
                8.334172 = idf(docFreq=28, maxDocs=44421)
                0.015825838 = queryNorm
              0.6511072 = fieldWeight in 3756, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.334172 = idf(docFreq=28, maxDocs=44421)
                0.078125 = fieldNorm(doc=3756)
          0.11105679 = weight(abstract_txt:relevance in 3756) [ClassicSimilarity], result of:
            0.11105679 = score(doc=3756,freq=3.0), product of:
              0.16649024 = queryWeight, product of:
                2.1341078 = boost
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.015825838 = queryNorm
              0.66704684 = fieldWeight in 3756, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.078125 = fieldNorm(doc=3756)
          0.42228657 = weight(abstract_txt:genetic in 3756) [ClassicSimilarity], result of:
            0.42228657 = score(doc=3756,freq=3.0), product of:
              0.405599 = queryWeight, product of:
                3.3309677 = boost
                7.694134 = idf(docFreq=54, maxDocs=44421)
                0.015825838 = queryNorm
              1.0411431 = fieldWeight in 3756, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                7.694134 = idf(docFreq=54, maxDocs=44421)
                0.078125 = fieldNorm(doc=3756)
        0.28 = coord(7/25)