Document (#27758)

Author

Lopez-Pujalte, C.
Guerrero Bote, V.P.
Moya-Anegón, F. de

Title

Evaluation of the application of genetic algorithms to relevance feedback

Source

Challenges in knowledge representation and organization for the 21st century: Integration of knowledge across boundaries. Proceedings of the 7th ISKO International Conference Granada, Spain, July 10-13, 2002. Ed.: M. López-Huertas

Imprint

Würzburg : Ergon Verlag

Year

2003

Pages

S.422-428

Series

Advances in knowledge organization; vol.8

Abstract

We evaluated the different genetic algorithms applied to relevance feedback that are to be found in the literature and which follow the vector space model (the most commonly used model in this type of application). They were compared with a traditional relevance feedback algorithm - the Ide dec-hi method - since this had given the best results in the study of Salton & Buckley (1990) an this subject. The experiment was performed an the Cranfield collection, and the different algorithms were evaluated using the residual collection method (one of the most suitable methods for evaluating relevance feedback techniques). The results varied greatly depending an the fitness function that was used, from no improvement in some of the genetic algorithms, to a more than 127% improvement with one algorithm, surpassing even the traditional Ide dec-hi method. One can therefore conclude that genetic algorithms show great promise as an aid to implementing a truly effective information retrieval system.

Theme

Retrievalalgorithmen

Similar documents (author)

1. López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Order-based fitness functions for genetic algorithms applied to relevance feedback (2003) 4.75

   4.752512 = sum of:
     4.752512 = product of:
       5.7030144 = sum of:
         0.8970105 = weight(author_txt:moya in 155) [ClassicSimilarity], result of:
           0.8970105 = score(doc=155,freq=1.0), product of:
             0.35144714 = queryWeight, product of:
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.043030117 = queryNorm
             2.552334 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.3125 = fieldNorm(doc=155)
         0.9388847 = weight(author_txt:anegón in 155) [ClassicSimilarity], result of:
           0.9388847 = score(doc=155,freq=1.0), product of:
             0.36230123 = queryWeight, product of:
               1.0153246 = boost
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.043030117 = queryNorm
             2.5914476 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.3125 = fieldNorm(doc=155)
         1.1232979 = weight(author_txt:guerrero in 155) [ClassicSimilarity], result of:
           1.1232979 = score(doc=155,freq=1.0), product of:
             0.40831152 = queryWeight, product of:
               1.0778686 = boost
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.043030117 = queryNorm
             2.7510808 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.3125 = fieldNorm(doc=155)
         1.1453198 = weight(author_txt:bote in 155) [ClassicSimilarity], result of:
           1.1453198 = score(doc=155,freq=1.0), product of:
             0.41363078 = queryWeight, product of:
               1.0848668 = boost
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.043030117 = queryNorm
             2.7689424 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.3125 = fieldNorm(doc=155)
         1.5985014 = weight(author_txt:pujalte in 155) [ClassicSimilarity], result of:
           1.5985014 = score(doc=155,freq=1.0), product of:
             0.51657933 = queryWeight, product of:
               1.2123792 = boost
               9.90207 = idf(docFreq=5, maxDocs=44083)
               0.043030117 = queryNorm
             3.0943968 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.90207 = idf(docFreq=5, maxDocs=44083)
               0.3125 = fieldNorm(doc=155)
       0.8333333 = coord(5/6)
   

2. López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Genetic algorithms in relevance feedback : a second test and new contributions (2003) 4.75

   4.752512 = sum of:
     4.752512 = product of:
       5.7030144 = sum of:
         0.8970105 = weight(author_txt:moya in 2077) [ClassicSimilarity], result of:
           0.8970105 = score(doc=2077,freq=1.0), product of:
             0.35144714 = queryWeight, product of:
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.043030117 = queryNorm
             2.552334 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.3125 = fieldNorm(doc=2077)
         0.9388847 = weight(author_txt:anegón in 2077) [ClassicSimilarity], result of:
           0.9388847 = score(doc=2077,freq=1.0), product of:
             0.36230123 = queryWeight, product of:
               1.0153246 = boost
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.043030117 = queryNorm
             2.5914476 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.3125 = fieldNorm(doc=2077)
         1.1232979 = weight(author_txt:guerrero in 2077) [ClassicSimilarity], result of:
           1.1232979 = score(doc=2077,freq=1.0), product of:
             0.40831152 = queryWeight, product of:
               1.0778686 = boost
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.043030117 = queryNorm
             2.7510808 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.3125 = fieldNorm(doc=2077)
         1.1453198 = weight(author_txt:bote in 2077) [ClassicSimilarity], result of:
           1.1453198 = score(doc=2077,freq=1.0), product of:
             0.41363078 = queryWeight, product of:
               1.0848668 = boost
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.043030117 = queryNorm
             2.7689424 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.3125 = fieldNorm(doc=2077)
         1.5985014 = weight(author_txt:pujalte in 2077) [ClassicSimilarity], result of:
           1.5985014 = score(doc=2077,freq=1.0), product of:
             0.51657933 = queryWeight, product of:
               1.2123792 = boost
               9.90207 = idf(docFreq=5, maxDocs=44083)
               0.043030117 = queryNorm
             3.0943968 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.90207 = idf(docFreq=5, maxDocs=44083)
               0.3125 = fieldNorm(doc=2077)
       0.8333333 = coord(5/6)
   

3. Guerrero Bote, V.P.; López-Pujalte, C.; Faba, C.; Reyes, M.J.; Zapica, F.; Moya-Anegón, F. de: Artificial neural networks applied to information retrieval (2003) 3.80

   3.8020093 = sum of:
     3.8020093 = product of:
       4.5624113 = sum of:
         0.7176084 = weight(author_txt:moya in 3781) [ClassicSimilarity], result of:
           0.7176084 = score(doc=3781,freq=1.0), product of:
             0.35144714 = queryWeight, product of:
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.043030117 = queryNorm
             2.0418673 = fieldWeight in 3781, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.25 = fieldNorm(doc=3781)
         0.7511077 = weight(author_txt:anegón in 3781) [ClassicSimilarity], result of:
           0.7511077 = score(doc=3781,freq=1.0), product of:
             0.36230123 = queryWeight, product of:
               1.0153246 = boost
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.043030117 = queryNorm
             2.073158 = fieldWeight in 3781, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.25 = fieldNorm(doc=3781)
         0.89863837 = weight(author_txt:guerrero in 3781) [ClassicSimilarity], result of:
           0.89863837 = score(doc=3781,freq=1.0), product of:
             0.40831152 = queryWeight, product of:
               1.0778686 = boost
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.043030117 = queryNorm
             2.2008646 = fieldWeight in 3781, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.25 = fieldNorm(doc=3781)
         0.91625583 = weight(author_txt:bote in 3781) [ClassicSimilarity], result of:
           0.91625583 = score(doc=3781,freq=1.0), product of:
             0.41363078 = queryWeight, product of:
               1.0848668 = boost
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.043030117 = queryNorm
             2.215154 = fieldWeight in 3781, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.25 = fieldNorm(doc=3781)
         1.2788012 = weight(author_txt:pujalte in 3781) [ClassicSimilarity], result of:
           1.2788012 = score(doc=3781,freq=1.0), product of:
             0.51657933 = queryWeight, product of:
               1.2123792 = boost
               9.90207 = idf(docFreq=5, maxDocs=44083)
               0.043030117 = queryNorm
             2.4755175 = fieldWeight in 3781, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.90207 = idf(docFreq=5, maxDocs=44083)
               0.25 = fieldNorm(doc=3781)
       0.8333333 = coord(5/6)
   

4. Guerrero-Bote, V.P.; Moya Anegón, F. de; Herrero Solana, V.: Document organization using Kohonen's algorithm (2002) 2.74

   2.7363422 = sum of:
     2.7363422 = product of:
       4.104513 = sum of:
         0.8970105 = weight(author_txt:moya in 3565) [ClassicSimilarity], result of:
           0.8970105 = score(doc=3565,freq=1.0), product of:
             0.35144714 = queryWeight, product of:
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.043030117 = queryNorm
             2.552334 = fieldWeight in 3565, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.3125 = fieldNorm(doc=3565)
         0.9388847 = weight(author_txt:anegón in 3565) [ClassicSimilarity], result of:
           0.9388847 = score(doc=3565,freq=1.0), product of:
             0.36230123 = queryWeight, product of:
               1.0153246 = boost
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.043030117 = queryNorm
             2.5914476 = fieldWeight in 3565, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.3125 = fieldNorm(doc=3565)
         1.1232979 = weight(author_txt:guerrero in 3565) [ClassicSimilarity], result of:
           1.1232979 = score(doc=3565,freq=1.0), product of:
             0.40831152 = queryWeight, product of:
               1.0778686 = boost
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.043030117 = queryNorm
             2.7510808 = fieldWeight in 3565, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.3125 = fieldNorm(doc=3565)
         1.1453198 = weight(author_txt:bote in 3565) [ClassicSimilarity], result of:
           1.1453198 = score(doc=3565,freq=1.0), product of:
             0.41363078 = queryWeight, product of:
               1.0848668 = boost
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.043030117 = queryNorm
             2.7689424 = fieldWeight in 3565, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.3125 = fieldNorm(doc=3565)
       0.6666667 = coord(4/6)
   

5. Faba-Pérez, C.; Guerrero-Bote, V.P.; Moya-Anegón, F.: "Sitation" distributions and Bradford's law in a closed Web space (2003) 2.74

   2.7363422 = sum of:
     2.7363422 = product of:
       4.104513 = sum of:
         0.8970105 = weight(author_txt:moya in 5448) [ClassicSimilarity], result of:
           0.8970105 = score(doc=5448,freq=1.0), product of:
             0.35144714 = queryWeight, product of:
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.043030117 = queryNorm
             2.552334 = fieldWeight in 5448, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.167469 = idf(docFreq=33, maxDocs=44083)
               0.3125 = fieldNorm(doc=5448)
         0.9388847 = weight(author_txt:anegón in 5448) [ClassicSimilarity], result of:
           0.9388847 = score(doc=5448,freq=1.0), product of:
             0.36230123 = queryWeight, product of:
               1.0153246 = boost
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.043030117 = queryNorm
             2.5914476 = fieldWeight in 5448, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.292632 = idf(docFreq=29, maxDocs=44083)
               0.3125 = fieldNorm(doc=5448)
         1.1232979 = weight(author_txt:guerrero in 5448) [ClassicSimilarity], result of:
           1.1232979 = score(doc=5448,freq=1.0), product of:
             0.40831152 = queryWeight, product of:
               1.0778686 = boost
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.043030117 = queryNorm
             2.7510808 = fieldWeight in 5448, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.803458 = idf(docFreq=17, maxDocs=44083)
               0.3125 = fieldNorm(doc=5448)
         1.1453198 = weight(author_txt:bote in 5448) [ClassicSimilarity], result of:
           1.1453198 = score(doc=5448,freq=1.0), product of:
             0.41363078 = queryWeight, product of:
               1.0848668 = boost
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.043030117 = queryNorm
             2.7689424 = fieldWeight in 5448, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.860616 = idf(docFreq=16, maxDocs=44083)
               0.3125 = fieldNorm(doc=5448)
       0.6666667 = coord(4/6)
   

Similar documents (content)

1. López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Genetic algorithms in relevance feedback : a second test and new contributions (2003) 0.90

   0.9036072 = sum of:
     0.9036072 = product of:
       1.6135843 = sum of:
         0.01561733 = weight(abstract_txt:that in 2077) [ClassicSimilarity], result of:
           0.01561733 = score(doc=2077,freq=3.0), product of:
             0.040525094 = queryWeight, product of:
               1.0284158 = boost
               2.3732903 = idf(docFreq=11164, maxDocs=44083)
               0.016603684 = queryNorm
             0.3853743 = fieldWeight in 2077, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.3732903 = idf(docFreq=11164, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.013490232 = weight(abstract_txt:this in 2077) [ClassicSimilarity], result of:
           0.013490232 = score(doc=2077,freq=2.0), product of:
             0.042075522 = queryWeight, product of:
               1.0479039 = boost
               2.4182634 = idf(docFreq=10673, maxDocs=44083)
               0.016603684 = queryNorm
             0.32061946 = fieldWeight in 2077, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4182634 = idf(docFreq=10673, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.027634418 = weight(abstract_txt:most in 2077) [ClassicSimilarity], result of:
           0.027634418 = score(doc=2077,freq=1.0), product of:
             0.07469583 = queryWeight, product of:
               1.1400115 = boost
               3.9462326 = idf(docFreq=2315, maxDocs=44083)
               0.016603684 = queryNorm
             0.3699593 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9462326 = idf(docFreq=2315, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.04032495 = weight(abstract_txt:model in 2077) [ClassicSimilarity], result of:
           0.04032495 = score(doc=2077,freq=2.0), product of:
             0.07627263 = queryWeight, product of:
               1.1519812 = boost
               3.9876666 = idf(docFreq=2221, maxDocs=44083)
               0.016603684 = queryNorm
             0.52869487 = fieldWeight in 2077, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9876666 = idf(docFreq=2221, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.12670319 = weight(abstract_txt:cranfield in 2077) [ClassicSimilarity], result of:
           0.12670319 = score(doc=2077,freq=1.0), product of:
             0.16362306 = queryWeight, product of:
               1.1930766 = boost
               8.259842 = idf(docFreq=30, maxDocs=44083)
               0.016603684 = queryNorm
             0.7743602 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.259842 = idf(docFreq=30, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.1297971 = weight(abstract_txt:fitness in 2077) [ClassicSimilarity], result of:
           0.1297971 = score(doc=2077,freq=1.0), product of:
             0.16627598 = queryWeight, product of:
               1.2027097 = boost
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.016603684 = queryNorm
             0.78061247 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.04333654 = weight(abstract_txt:application in 2077) [ClassicSimilarity], result of:
           0.04333654 = score(doc=2077,freq=1.0), product of:
             0.1008244 = queryWeight, product of:
               1.3244754 = boost
               4.5847673 = idf(docFreq=1222, maxDocs=44083)
               0.016603684 = queryNorm
             0.42982194 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5847673 = idf(docFreq=1222, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.045232315 = weight(abstract_txt:collection in 2077) [ClassicSimilarity], result of:
           0.045232315 = score(doc=2077,freq=1.0), product of:
             0.10374377 = queryWeight, product of:
               1.3435136 = boost
               4.6506696 = idf(docFreq=1144, maxDocs=44083)
               0.016603684 = queryNorm
             0.4360003 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6506696 = idf(docFreq=1144, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.045437198 = weight(abstract_txt:traditional in 2077) [ClassicSimilarity], result of:
           0.045437198 = score(doc=2077,freq=1.0), product of:
             0.10405681 = queryWeight, product of:
               1.3455391 = boost
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.016603684 = queryNorm
             0.4366576 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.657681 = idf(docFreq=1136, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.20826106 = weight(abstract_txt:residual in 2077) [ClassicSimilarity], result of:
           0.20826106 = score(doc=2077,freq=1.0), product of:
             0.22788979 = queryWeight, product of:
               1.408019 = boost
               9.747919 = idf(docFreq=6, maxDocs=44083)
               0.016603684 = queryNorm
             0.9138674 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.747919 = idf(docFreq=6, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.0869336 = weight(abstract_txt:method in 2077) [ClassicSimilarity], result of:
           0.0869336 = score(doc=2077,freq=2.0), product of:
             0.1457052 = queryWeight, product of:
               1.9500431 = boost
               4.5001435 = idf(docFreq=1330, maxDocs=44083)
               0.016603684 = queryNorm
             0.59664035 = fieldWeight in 2077, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.5001435 = idf(docFreq=1330, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.152718 = weight(abstract_txt:relevance in 2077) [ClassicSimilarity], result of:
           0.152718 = score(doc=2077,freq=2.0), product of:
             0.23348355 = queryWeight, product of:
               2.8503895 = boost
               4.933415 = idf(docFreq=862, maxDocs=44083)
               0.016603684 = queryNorm
             0.65408456 = fieldWeight in 2077, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.933415 = idf(docFreq=862, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.26673642 = weight(abstract_txt:feedback in 2077) [ClassicSimilarity], result of:
           0.26673642 = score(doc=2077,freq=2.0), product of:
             0.33862397 = queryWeight, product of:
               3.4326925 = boost
               5.941257 = idf(docFreq=314, maxDocs=44083)
               0.016603684 = queryNorm
             0.78770685 = fieldWeight in 2077, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.941257 = idf(docFreq=314, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
         0.41136196 = weight(abstract_txt:genetic in 2077) [ClassicSimilarity], result of:
           0.41136196 = score(doc=2077,freq=1.0), product of:
             0.5694937 = queryWeight, product of:
               4.451645 = boost
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.016603684 = queryNorm
             0.72232926 = fieldWeight in 2077, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.09375 = fieldNorm(doc=2077)
       0.56 = coord(14/25)
   

2. Fan, W.; Fox, E.A.; Pathak, P.; Wu, H.: ¬The effects of fitness functions an genetic programming-based ranking discovery for Web search (2004) 0.45

   0.44801983 = sum of:
     0.44801983 = product of:
       1.400062 = sum of:
         0.02246363 = weight(abstract_txt:results in 3240) [ClassicSimilarity], result of:
           0.02246363 = score(doc=3240,freq=2.0), product of:
             0.05831232 = queryWeight, product of:
               1.0072591 = boost
               3.4867003 = idf(docFreq=3666, maxDocs=44083)
               0.016603684 = queryNorm
             0.3852296 = fieldWeight in 3240, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4867003 = idf(docFreq=3666, maxDocs=44083)
               0.078125 = fieldNorm(doc=3240)
         0.010626247 = weight(abstract_txt:that in 3240) [ClassicSimilarity], result of:
           0.010626247 = score(doc=3240,freq=2.0), product of:
             0.040525094 = queryWeight, product of:
               1.0284158 = boost
               2.3732903 = idf(docFreq=11164, maxDocs=44083)
               0.016603684 = queryNorm
             0.262214 = fieldWeight in 3240, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.3732903 = idf(docFreq=11164, maxDocs=44083)
               0.078125 = fieldNorm(doc=3240)
         0.007949195 = weight(abstract_txt:this in 3240) [ClassicSimilarity], result of:
           0.007949195 = score(doc=3240,freq=1.0), product of:
             0.042075522 = queryWeight, product of:
               1.0479039 = boost
               2.4182634 = idf(docFreq=10673, maxDocs=44083)
               0.016603684 = queryNorm
             0.18892683 = fieldWeight in 3240, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4182634 = idf(docFreq=10673, maxDocs=44083)
               0.078125 = fieldNorm(doc=3240)
         0.01849286 = weight(abstract_txt:different in 3240) [ClassicSimilarity], result of:
           0.01849286 = score(doc=3240,freq=1.0), product of:
             0.06453367 = queryWeight, product of:
               1.05963 = boost
               3.6679862 = idf(docFreq=3058, maxDocs=44083)
               0.016603684 = queryNorm
             0.28656143 = fieldWeight in 3240, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6679862 = idf(docFreq=3058, maxDocs=44083)
               0.078125 = fieldNorm(doc=3240)
         0.26494727 = weight(abstract_txt:fitness in 3240) [ClassicSimilarity], result of:
           0.26494727 = score(doc=3240,freq=6.0), product of:
             0.16627598 = queryWeight, product of:
               1.2027097 = boost
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.016603684 = queryNorm
             1.5934187 = fieldWeight in 3240, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.078125 = fieldNorm(doc=3240)
         0.08710856 = weight(abstract_txt:improvement in 3240) [ClassicSimilarity], result of:
           0.08710856 = score(doc=3240,freq=1.0), product of:
             0.18133886 = queryWeight, product of:
               1.7762599 = boost
               6.148652 = idf(docFreq=255, maxDocs=44083)
               0.016603684 = queryNorm
             0.48036343 = fieldWeight in 3240, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.148652 = idf(docFreq=255, maxDocs=44083)
               0.078125 = fieldNorm(doc=3240)
         0.30287096 = weight(abstract_txt:algorithms in 3240) [ClassicSimilarity], result of:
           0.30287096 = score(doc=3240,freq=3.0), product of:
             0.3916472 = queryWeight, product of:
               4.127419 = boost
               5.714944 = idf(docFreq=394, maxDocs=44083)
               0.016603684 = queryNorm
             0.77332604 = fieldWeight in 3240, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.714944 = idf(docFreq=394, maxDocs=44083)
               0.078125 = fieldNorm(doc=3240)
         0.68560326 = weight(abstract_txt:genetic in 3240) [ClassicSimilarity], result of:
           0.68560326 = score(doc=3240,freq=4.0), product of:
             0.5694937 = queryWeight, product of:
               4.451645 = boost
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.016603684 = queryNorm
             1.2038821 = fieldWeight in 3240, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.078125 = fieldNorm(doc=3240)
       0.32 = coord(8/25)
   

3. López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Order-based fitness functions for genetic algorithms applied to relevance feedback (2003) 0.44

   0.4411155 = sum of:
     0.4411155 = product of:
       1.0025352 = sum of:
         0.01837577 = weight(abstract_txt:were in 155) [ClassicSimilarity], result of:
           0.01837577 = score(doc=155,freq=2.0), product of:
             0.06469519 = queryWeight, product of:
               1.0609552 = boost
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.016603684 = queryNorm
             0.2840361 = fieldWeight in 155, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6725733 = idf(docFreq=3044, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.07391019 = weight(abstract_txt:cranfield in 155) [ClassicSimilarity], result of:
           0.07391019 = score(doc=155,freq=1.0), product of:
             0.16362306 = queryWeight, product of:
               1.1930766 = boost
               8.259842 = idf(docFreq=30, maxDocs=44083)
               0.016603684 = queryNorm
             0.4517101 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.259842 = idf(docFreq=30, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.13114218 = weight(abstract_txt:fitness in 155) [ClassicSimilarity], result of:
           0.13114218 = score(doc=155,freq=3.0), product of:
             0.16627598 = queryWeight, product of:
               1.2027097 = boost
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.016603684 = queryNorm
             0.78870195 = fieldWeight in 155, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.03731475 = weight(abstract_txt:collection in 155) [ClassicSimilarity], result of:
           0.03731475 = score(doc=155,freq=2.0), product of:
             0.10374377 = queryWeight, product of:
               1.3435136 = boost
               4.6506696 = idf(docFreq=1144, maxDocs=44083)
               0.016603684 = queryNorm
             0.35968184 = fieldWeight in 155, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.6506696 = idf(docFreq=1144, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.12148562 = weight(abstract_txt:residual in 155) [ClassicSimilarity], result of:
           0.12148562 = score(doc=155,freq=1.0), product of:
             0.22788979 = queryWeight, product of:
               1.408019 = boost
               9.747919 = idf(docFreq=6, maxDocs=44083)
               0.016603684 = queryNorm
             0.53308934 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.747919 = idf(docFreq=6, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.084245116 = weight(abstract_txt:algorithm in 155) [ClassicSimilarity], result of:
           0.084245116 = score(doc=155,freq=3.0), product of:
             0.15596999 = queryWeight, product of:
               1.6473337 = boost
               5.702365 = idf(docFreq=399, maxDocs=44083)
               0.016603684 = queryNorm
             0.5401367 = fieldWeight in 155, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.702365 = idf(docFreq=399, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.060975995 = weight(abstract_txt:improvement in 155) [ClassicSimilarity], result of:
           0.060975995 = score(doc=155,freq=1.0), product of:
             0.18133886 = queryWeight, product of:
               1.7762599 = boost
               6.148652 = idf(docFreq=255, maxDocs=44083)
               0.016603684 = queryNorm
             0.33625442 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.148652 = idf(docFreq=255, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.062108364 = weight(abstract_txt:method in 155) [ClassicSimilarity], result of:
           0.062108364 = score(doc=155,freq=3.0), product of:
             0.1457052 = queryWeight, product of:
               1.9500431 = boost
               4.5001435 = idf(docFreq=1330, maxDocs=44083)
               0.016603684 = queryNorm
             0.42626047 = fieldWeight in 155, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.5001435 = idf(docFreq=1330, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.06299296 = weight(abstract_txt:relevance in 155) [ClassicSimilarity], result of:
           0.06299296 = score(doc=155,freq=1.0), product of:
             0.23348355 = queryWeight, product of:
               2.8503895 = boost
               4.933415 = idf(docFreq=862, maxDocs=44083)
               0.016603684 = queryNorm
             0.26979613 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.933415 = idf(docFreq=862, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.110023156 = weight(abstract_txt:feedback in 155) [ClassicSimilarity], result of:
           0.110023156 = score(doc=155,freq=1.0), product of:
             0.33862397 = queryWeight, product of:
               3.4326925 = boost
               5.941257 = idf(docFreq=314, maxDocs=44083)
               0.016603684 = queryNorm
             0.3249125 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.941257 = idf(docFreq=314, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
         0.23996115 = weight(abstract_txt:genetic in 155) [ClassicSimilarity], result of:
           0.23996115 = score(doc=155,freq=1.0), product of:
             0.5694937 = queryWeight, product of:
               4.451645 = boost
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.016603684 = queryNorm
             0.42135873 = fieldWeight in 155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.0546875 = fieldNorm(doc=155)
       0.44 = coord(11/25)
   

4. Smith, M.P.; Smith, M.: ¬The use of genetic programming to build Boolean queries for text retrieval through relevance feedback (1997) 0.43

   0.42751625 = sum of:
     0.42751625 = product of:
       1.3359883 = sum of:
         0.01301444 = weight(abstract_txt:that in 1762) [ClassicSimilarity], result of:
           0.01301444 = score(doc=1762,freq=3.0), product of:
             0.040525094 = queryWeight, product of:
               1.0284158 = boost
               2.3732903 = idf(docFreq=11164, maxDocs=44083)
               0.016603684 = queryNorm
             0.32114524 = fieldWeight in 1762, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.3732903 = idf(docFreq=11164, maxDocs=44083)
               0.078125 = fieldNorm(doc=1762)
         0.10816426 = weight(abstract_txt:fitness in 1762) [ClassicSimilarity], result of:
           0.10816426 = score(doc=1762,freq=1.0), product of:
             0.16627598 = queryWeight, product of:
               1.2027097 = boost
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.016603684 = queryNorm
             0.65051043 = fieldWeight in 1762, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.078125 = fieldNorm(doc=1762)
         0.037693594 = weight(abstract_txt:collection in 1762) [ClassicSimilarity], result of:
           0.037693594 = score(doc=1762,freq=1.0), product of:
             0.10374377 = queryWeight, product of:
               1.3435136 = boost
               4.6506696 = idf(docFreq=1144, maxDocs=44083)
               0.016603684 = queryNorm
             0.36333355 = fieldWeight in 1762, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6506696 = idf(docFreq=1144, maxDocs=44083)
               0.078125 = fieldNorm(doc=1762)
         0.069484204 = weight(abstract_txt:algorithm in 1762) [ClassicSimilarity], result of:
           0.069484204 = score(doc=1762,freq=1.0), product of:
             0.15596999 = queryWeight, product of:
               1.6473337 = boost
               5.702365 = idf(docFreq=399, maxDocs=44083)
               0.016603684 = queryNorm
             0.44549727 = fieldWeight in 1762, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.702365 = idf(docFreq=399, maxDocs=44083)
               0.078125 = fieldNorm(doc=1762)
         0.08998994 = weight(abstract_txt:relevance in 1762) [ClassicSimilarity], result of:
           0.08998994 = score(doc=1762,freq=1.0), product of:
             0.23348355 = queryWeight, product of:
               2.8503895 = boost
               4.933415 = idf(docFreq=862, maxDocs=44083)
               0.016603684 = queryNorm
             0.38542303 = fieldWeight in 1762, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.933415 = idf(docFreq=862, maxDocs=44083)
               0.078125 = fieldNorm(doc=1762)
         0.15717594 = weight(abstract_txt:feedback in 1762) [ClassicSimilarity], result of:
           0.15717594 = score(doc=1762,freq=1.0), product of:
             0.33862397 = queryWeight, product of:
               3.4326925 = boost
               5.941257 = idf(docFreq=314, maxDocs=44083)
               0.016603684 = queryNorm
             0.4641607 = fieldWeight in 1762, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.941257 = idf(docFreq=314, maxDocs=44083)
               0.078125 = fieldNorm(doc=1762)
         0.17486262 = weight(abstract_txt:algorithms in 1762) [ClassicSimilarity], result of:
           0.17486262 = score(doc=1762,freq=1.0), product of:
             0.3916472 = queryWeight, product of:
               4.127419 = boost
               5.714944 = idf(docFreq=394, maxDocs=44083)
               0.016603684 = queryNorm
             0.44647998 = fieldWeight in 1762, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.714944 = idf(docFreq=394, maxDocs=44083)
               0.078125 = fieldNorm(doc=1762)
         0.68560326 = weight(abstract_txt:genetic in 1762) [ClassicSimilarity], result of:
           0.68560326 = score(doc=1762,freq=4.0), product of:
             0.5694937 = queryWeight, product of:
               4.451645 = boost
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.016603684 = queryNorm
             1.2038821 = fieldWeight in 1762, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.078125 = fieldNorm(doc=1762)
       0.32 = coord(8/25)
   

5. Robertson, A.M.; Willett, P.: Use of genetic algorithms in information retrieval (1995) 0.40

   0.40126488 = sum of:
     0.40126488 = product of:
       1.2539527 = sum of:
         0.022237862 = weight(abstract_txt:results in 2487) [ClassicSimilarity], result of:
           0.022237862 = score(doc=2487,freq=1.0), product of:
             0.05831232 = queryWeight, product of:
               1.0072591 = boost
               3.4867003 = idf(docFreq=3666, maxDocs=44083)
               0.016603684 = queryNorm
             0.38135785 = fieldWeight in 2487, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4867003 = idf(docFreq=3666, maxDocs=44083)
               0.109375 = fieldNorm(doc=2487)
         0.010519448 = weight(abstract_txt:that in 2487) [ClassicSimilarity], result of:
           0.010519448 = score(doc=2487,freq=1.0), product of:
             0.040525094 = queryWeight, product of:
               1.0284158 = boost
               2.3732903 = idf(docFreq=11164, maxDocs=44083)
               0.016603684 = queryNorm
             0.25957862 = fieldWeight in 2487, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.3732903 = idf(docFreq=11164, maxDocs=44083)
               0.109375 = fieldNorm(doc=2487)
         0.15142995 = weight(abstract_txt:fitness in 2487) [ClassicSimilarity], result of:
           0.15142995 = score(doc=2487,freq=1.0), product of:
             0.16627598 = queryWeight, product of:
               1.2027097 = boost
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.016603684 = queryNorm
             0.91071457 = fieldWeight in 2487, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.326533 = idf(docFreq=28, maxDocs=44083)
               0.109375 = fieldNorm(doc=2487)
         0.050559297 = weight(abstract_txt:application in 2487) [ClassicSimilarity], result of:
           0.050559297 = score(doc=2487,freq=1.0), product of:
             0.1008244 = queryWeight, product of:
               1.3244754 = boost
               4.5847673 = idf(docFreq=1222, maxDocs=44083)
               0.016603684 = queryNorm
             0.50145894 = fieldWeight in 2487, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5847673 = idf(docFreq=1222, maxDocs=44083)
               0.109375 = fieldNorm(doc=2487)
         0.16849023 = weight(abstract_txt:algorithm in 2487) [ClassicSimilarity], result of:
           0.16849023 = score(doc=2487,freq=3.0), product of:
             0.15596999 = queryWeight, product of:
               1.6473337 = boost
               5.702365 = idf(docFreq=399, maxDocs=44083)
               0.016603684 = queryNorm
             1.0802734 = fieldWeight in 2487, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.702365 = idf(docFreq=399, maxDocs=44083)
               0.109375 = fieldNorm(doc=2487)
         0.12598592 = weight(abstract_txt:relevance in 2487) [ClassicSimilarity], result of:
           0.12598592 = score(doc=2487,freq=1.0), product of:
             0.23348355 = queryWeight, product of:
               2.8503895 = boost
               4.933415 = idf(docFreq=862, maxDocs=44083)
               0.016603684 = queryNorm
             0.53959227 = fieldWeight in 2487, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.933415 = idf(docFreq=862, maxDocs=44083)
               0.109375 = fieldNorm(doc=2487)
         0.24480769 = weight(abstract_txt:algorithms in 2487) [ClassicSimilarity], result of:
           0.24480769 = score(doc=2487,freq=1.0), product of:
             0.3916472 = queryWeight, product of:
               4.127419 = boost
               5.714944 = idf(docFreq=394, maxDocs=44083)
               0.016603684 = queryNorm
             0.625072 = fieldWeight in 2487, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.714944 = idf(docFreq=394, maxDocs=44083)
               0.109375 = fieldNorm(doc=2487)
         0.4799223 = weight(abstract_txt:genetic in 2487) [ClassicSimilarity], result of:
           0.4799223 = score(doc=2487,freq=1.0), product of:
             0.5694937 = queryWeight, product of:
               4.451645 = boost
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.016603684 = queryNorm
             0.84271747 = fieldWeight in 2487, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.7048454 = idf(docFreq=53, maxDocs=44083)
               0.109375 = fieldNorm(doc=2487)
       0.32 = coord(8/25)