Document (#25175)

Author

Bodoff, D.
Enache, D.
Kambil, A.
Simon, G.
Yukhimets, A.

Title

¬A unified maximum likelihood approach to document retrieval

Source

Journal of the American Society for Information Science and technology. 52(2001) no.10, S.785-796

Year

2001

Abstract

Empirical work shows significant benefits from using relevance feedback data to improve information retrieval (IR) performance. Still, one fundamental difficulty has limited the ability to fully exploit this valuable data. The problem is that it is not clear whether the relevance feedback data should be used to train the system about what the users really mean, or about what the documents really mean. In this paper, we resolve the question using a maximum likelihood framework. We show how all the available data can be used to simultaneously estimate both documents and queries in proportions that are optimal in a maximum likelihood sense. The resulting algorithm is directly applicable to many approaches to IR, and the unified framework can help explain previously reported results as well as guidethe search for new methods that utilize feedback data in IR

Theme

Retrievalalgorithmen

Similar documents (author)

1. Bodoff, D.: ¬A re-unification of two competing models for document retrieval (1999) 2.13

   2.1290913 = sum of:
     2.1290913 = product of:
       4.2581825 = sum of:
         4.2581825 = weight(author_txt:bodoff in 2951) [ClassicSimilarity], result of:
           4.2581825 = score(doc=2951,freq=1.0), product of:
             0.75217706 = queryWeight, product of:
               1.0683908 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.0777259 = queryNorm
             5.661144 = fieldWeight in 2951, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.625 = fieldNorm(doc=2951)
       0.5 = coord(1/2)
   

2. Bodoff, D.: Relevance for browsing, relevance for searching (2006) 2.13

   2.1290913 = sum of:
     2.1290913 = product of:
       4.2581825 = sum of:
         4.2581825 = weight(author_txt:bodoff in 4909) [ClassicSimilarity], result of:
           4.2581825 = score(doc=4909,freq=1.0), product of:
             0.75217706 = queryWeight, product of:
               1.0683908 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.0777259 = queryNorm
             5.661144 = fieldWeight in 4909, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.625 = fieldNorm(doc=4909)
       0.5 = coord(1/2)
   

3. Bodoff, D.: Test theory for evaluating reliability of IR test collections (2008) 2.13

   2.1290913 = sum of:
     2.1290913 = product of:
       4.2581825 = sum of:
         4.2581825 = weight(author_txt:bodoff in 2085) [ClassicSimilarity], result of:
           4.2581825 = score(doc=2085,freq=1.0), product of:
             0.75217706 = queryWeight, product of:
               1.0683908 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.0777259 = queryNorm
             5.661144 = fieldWeight in 2085, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.625 = fieldNorm(doc=2085)
       0.5 = coord(1/2)
   

4. Bodoff, D.: Emergence of terminological conventions as a searcher-indexer coordination game (2009) 2.13

   2.1290913 = sum of:
     2.1290913 = product of:
       4.2581825 = sum of:
         4.2581825 = weight(author_txt:bodoff in 3299) [ClassicSimilarity], result of:
           4.2581825 = score(doc=3299,freq=1.0), product of:
             0.75217706 = queryWeight, product of:
               1.0683908 = boost
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.0777259 = queryNorm
             5.661144 = fieldWeight in 3299, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.05783 = idf(docFreq=13, maxDocs=44218)
               0.625 = fieldNorm(doc=3299)
       0.5 = coord(1/2)
   

5. Simon, R.: ALEPH: being part of a global information universe (1993) 1.75

   1.7458373 = sum of:
     1.7458373 = product of:
       3.4916747 = sum of:
         3.4916747 = weight(author_txt:simon in 7015) [ClassicSimilarity], result of:
           3.4916747 = score(doc=7015,freq=1.0), product of:
             0.65896106 = queryWeight, product of:
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.0777259 = queryNorm
             5.298757 = fieldWeight in 7015, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.478011 = idf(docFreq=24, maxDocs=44218)
               0.625 = fieldNorm(doc=7015)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Bodoff, D.; Wu, B.; Wong, K.Y.M.: Relevance data for language models using maximum likelihood (2003) 0.44

   0.4446555 = sum of:
     0.4446555 = product of:
       1.2351542 = sum of:
         0.019884428 = weight(abstract_txt:used in 1822) [ClassicSimilarity], result of:
           0.019884428 = score(doc=1822,freq=1.0), product of:
             0.063138336 = queryWeight, product of:
               1.015587 = boost
               3.3592992 = idf(docFreq=4177, maxDocs=44218)
               0.01850663 = queryNorm
             0.3149343 = fieldWeight in 1822, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3592992 = idf(docFreq=4177, maxDocs=44218)
               0.09375 = fieldNorm(doc=1822)
         0.02178558 = weight(abstract_txt:using in 1822) [ClassicSimilarity], result of:
           0.02178558 = score(doc=1822,freq=1.0), product of:
             0.06710123 = queryWeight, product of:
               1.0469738 = boost
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.01850663 = queryNorm
             0.32466736 = fieldWeight in 1822, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.09375 = fieldNorm(doc=1822)
         0.022013228 = weight(abstract_txt:retrieval in 1822) [ClassicSimilarity], result of:
           0.022013228 = score(doc=1822,freq=1.0), product of:
             0.06756787 = queryWeight, product of:
               1.0506079 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.01850663 = queryNorm
             0.3257943 = fieldWeight in 1822, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.09375 = fieldNorm(doc=1822)
         0.097770005 = weight(abstract_txt:estimate in 1822) [ClassicSimilarity], result of:
           0.097770005 = score(doc=1822,freq=1.0), product of:
             0.14490327 = queryWeight, product of:
               1.0879142 = boost
               7.1970778 = idf(docFreq=89, maxDocs=44218)
               0.01850663 = queryNorm
             0.674726 = fieldWeight in 1822, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1970778 = idf(docFreq=89, maxDocs=44218)
               0.09375 = fieldNorm(doc=1822)
         0.036717284 = weight(abstract_txt:documents in 1822) [ClassicSimilarity], result of:
           0.036717284 = score(doc=1822,freq=1.0), product of:
             0.09503088 = queryWeight, product of:
               1.2459567 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.01850663 = queryNorm
             0.38637212 = fieldWeight in 1822, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.09375 = fieldNorm(doc=1822)
         0.088983834 = weight(abstract_txt:relevance in 1822) [ClassicSimilarity], result of:
           0.088983834 = score(doc=1822,freq=2.0), product of:
             0.13608654 = queryWeight, product of:
               1.4910017 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.01850663 = queryNorm
             0.65387684 = fieldWeight in 1822, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.09375 = fieldNorm(doc=1822)
         0.048699114 = weight(abstract_txt:data in 1822) [ClassicSimilarity], result of:
           0.048699114 = score(doc=1822,freq=1.0), product of:
             0.15569636 = queryWeight, product of:
               2.521621 = boost
               3.3363478 = idf(docFreq=4274, maxDocs=44218)
               0.01850663 = queryNorm
             0.31278262 = fieldWeight in 1822, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3363478 = idf(docFreq=4274, maxDocs=44218)
               0.09375 = fieldNorm(doc=1822)
         0.4227134 = weight(abstract_txt:maximum in 1822) [ClassicSimilarity], result of:
           0.4227134 = score(doc=1822,freq=2.0), product of:
             0.44021904 = queryWeight, product of:
               3.2843587 = boost
               7.24254 = idf(docFreq=85, maxDocs=44218)
               0.01850663 = queryNorm
             0.9602342 = fieldWeight in 1822, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.24254 = idf(docFreq=85, maxDocs=44218)
               0.09375 = fieldNorm(doc=1822)
         0.47658724 = weight(abstract_txt:likelihood in 1822) [ClassicSimilarity], result of:
           0.47658724 = score(doc=1822,freq=2.0), product of:
             0.47686976 = queryWeight, product of:
               3.4183464 = boost
               7.538004 = idf(docFreq=63, maxDocs=44218)
               0.01850663 = queryNorm
             0.99940753 = fieldWeight in 1822, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.538004 = idf(docFreq=63, maxDocs=44218)
               0.09375 = fieldNorm(doc=1822)
       0.36 = coord(9/25)
   

2. Zhang, Y.; Xu, W.: Fast exact maximum likelihood estimation for mixture of language model (2008) 0.29

   0.28767547 = sum of:
     0.28767547 = product of:
       0.7990985 = sum of:
         0.013256285 = weight(abstract_txt:used in 2082) [ClassicSimilarity], result of:
           0.013256285 = score(doc=2082,freq=1.0), product of:
             0.063138336 = queryWeight, product of:
               1.015587 = boost
               3.3592992 = idf(docFreq=4177, maxDocs=44218)
               0.01850663 = queryNorm
             0.2099562 = fieldWeight in 2082, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3592992 = idf(docFreq=4177, maxDocs=44218)
               0.0625 = fieldNorm(doc=2082)
         0.01452372 = weight(abstract_txt:using in 2082) [ClassicSimilarity], result of:
           0.01452372 = score(doc=2082,freq=1.0), product of:
             0.06710123 = queryWeight, product of:
               1.0469738 = boost
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.01850663 = queryNorm
             0.21644491 = fieldWeight in 2082, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.0625 = fieldNorm(doc=2082)
         0.020754268 = weight(abstract_txt:retrieval in 2082) [ClassicSimilarity], result of:
           0.020754268 = score(doc=2082,freq=2.0), product of:
             0.06756787 = queryWeight, product of:
               1.0506079 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.01850663 = queryNorm
             0.3071618 = fieldWeight in 2082, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0625 = fieldNorm(doc=2082)
         0.0069778804 = weight(abstract_txt:that in 2082) [ClassicSimilarity], result of:
           0.0069778804 = score(doc=2082,freq=1.0), product of:
             0.04711849 = queryWeight, product of:
               1.0745134 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.01850663 = queryNorm
             0.1480922 = fieldWeight in 2082, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0625 = fieldNorm(doc=2082)
         0.06518 = weight(abstract_txt:estimate in 2082) [ClassicSimilarity], result of:
           0.06518 = score(doc=2082,freq=1.0), product of:
             0.14490327 = queryWeight, product of:
               1.0879142 = boost
               7.1970778 = idf(docFreq=89, maxDocs=44218)
               0.01850663 = queryNorm
             0.44981736 = fieldWeight in 2082, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1970778 = idf(docFreq=89, maxDocs=44218)
               0.0625 = fieldNorm(doc=2082)
         0.03295858 = weight(abstract_txt:framework in 2082) [ClassicSimilarity], result of:
           0.03295858 = score(doc=2082,freq=1.0), product of:
             0.115875304 = queryWeight, product of:
               1.3758339 = boost
               4.550903 = idf(docFreq=1268, maxDocs=44218)
               0.01850663 = queryNorm
             0.28443143 = fieldWeight in 2082, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.550903 = idf(docFreq=1268, maxDocs=44218)
               0.0625 = fieldNorm(doc=2082)
         0.045913965 = weight(abstract_txt:data in 2082) [ClassicSimilarity], result of:
           0.045913965 = score(doc=2082,freq=2.0), product of:
             0.15569636 = queryWeight, product of:
               2.521621 = boost
               3.3363478 = idf(docFreq=4274, maxDocs=44218)
               0.01850663 = queryNorm
             0.29489428 = fieldWeight in 2082, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.3363478 = idf(docFreq=4274, maxDocs=44218)
               0.0625 = fieldNorm(doc=2082)
         0.28180894 = weight(abstract_txt:maximum in 2082) [ClassicSimilarity], result of:
           0.28180894 = score(doc=2082,freq=2.0), product of:
             0.44021904 = queryWeight, product of:
               3.2843587 = boost
               7.24254 = idf(docFreq=85, maxDocs=44218)
               0.01850663 = queryNorm
             0.64015615 = fieldWeight in 2082, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.24254 = idf(docFreq=85, maxDocs=44218)
               0.0625 = fieldNorm(doc=2082)
         0.31772482 = weight(abstract_txt:likelihood in 2082) [ClassicSimilarity], result of:
           0.31772482 = score(doc=2082,freq=2.0), product of:
             0.47686976 = queryWeight, product of:
               3.4183464 = boost
               7.538004 = idf(docFreq=63, maxDocs=44218)
               0.01850663 = queryNorm
             0.6662717 = fieldWeight in 2082, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.538004 = idf(docFreq=63, maxDocs=44218)
               0.0625 = fieldNorm(doc=2082)
       0.36 = coord(9/25)
   

3. Meij, E.; Rijke, M. de: Thesaurus-based feedback to support mixed search and browsing environments (2007) 0.27

   0.27231207 = sum of:
     0.27231207 = product of:
       0.6807802 = sum of:
         0.013256285 = weight(abstract_txt:used in 2432) [ClassicSimilarity], result of:
           0.013256285 = score(doc=2432,freq=1.0), product of:
             0.063138336 = queryWeight, product of:
               1.015587 = boost
               3.3592992 = idf(docFreq=4177, maxDocs=44218)
               0.01850663 = queryNorm
             0.2099562 = fieldWeight in 2432, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3592992 = idf(docFreq=4177, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
         0.01452372 = weight(abstract_txt:using in 2432) [ClassicSimilarity], result of:
           0.01452372 = score(doc=2432,freq=1.0), product of:
             0.06710123 = queryWeight, product of:
               1.0469738 = boost
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.01850663 = queryNorm
             0.21644491 = fieldWeight in 2432, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
         0.014675485 = weight(abstract_txt:retrieval in 2432) [ClassicSimilarity], result of:
           0.014675485 = score(doc=2432,freq=1.0), product of:
             0.06756787 = queryWeight, product of:
               1.0506079 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.01850663 = queryNorm
             0.21719621 = fieldWeight in 2432, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
         0.0069778804 = weight(abstract_txt:that in 2432) [ClassicSimilarity], result of:
           0.0069778804 = score(doc=2432,freq=1.0), product of:
             0.04711849 = queryWeight, product of:
               1.0745134 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.01850663 = queryNorm
             0.1480922 = fieldWeight in 2432, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
         0.024478188 = weight(abstract_txt:documents in 2432) [ClassicSimilarity], result of:
           0.024478188 = score(doc=2432,freq=1.0), product of:
             0.09503088 = queryWeight, product of:
               1.2459567 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.01850663 = queryNorm
             0.2575814 = fieldWeight in 2432, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
         0.028089669 = weight(abstract_txt:what in 2432) [ClassicSimilarity], result of:
           0.028089669 = score(doc=2432,freq=1.0), product of:
             0.10416208 = queryWeight, product of:
               1.3044438 = boost
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.01850663 = queryNorm
             0.2696727 = fieldWeight in 2432, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.314763 = idf(docFreq=1606, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
         0.041947383 = weight(abstract_txt:relevance in 2432) [ClassicSimilarity], result of:
           0.041947383 = score(doc=2432,freq=1.0), product of:
             0.13608654 = queryWeight, product of:
               1.4910017 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.01850663 = queryNorm
             0.3082405 = fieldWeight in 2432, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
         0.091821596 = weight(abstract_txt:mean in 2432) [ClassicSimilarity], result of:
           0.091821596 = score(doc=2432,freq=1.0), product of:
             0.22942556 = queryWeight, product of:
               1.9359381 = boost
               6.4035826 = idf(docFreq=198, maxDocs=44218)
               0.01850663 = queryNorm
             0.4002239 = fieldWeight in 2432, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.4035826 = idf(docFreq=198, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
         0.22034457 = weight(abstract_txt:feedback in 2432) [ClassicSimilarity], result of:
           0.22034457 = score(doc=2432,freq=4.0), product of:
             0.29654497 = queryWeight, product of:
               2.6956375 = boost
               5.9443145 = idf(docFreq=314, maxDocs=44218)
               0.01850663 = queryNorm
             0.7430393 = fieldWeight in 2432, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.9443145 = idf(docFreq=314, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
         0.22466539 = weight(abstract_txt:likelihood in 2432) [ClassicSimilarity], result of:
           0.22466539 = score(doc=2432,freq=1.0), product of:
             0.47686976 = queryWeight, product of:
               3.4183464 = boost
               7.538004 = idf(docFreq=63, maxDocs=44218)
               0.01850663 = queryNorm
             0.47112525 = fieldWeight in 2432, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.538004 = idf(docFreq=63, maxDocs=44218)
               0.0625 = fieldNorm(doc=2432)
       0.4 = coord(10/25)
   

4. Bodoff, D.; Robertson, S.: ¬A new unified probabilistic model (2004) 0.26

   0.25971827 = sum of:
     0.25971827 = product of:
       0.7214396 = sum of:
         0.018344356 = weight(abstract_txt:retrieval in 2129) [ClassicSimilarity], result of:
           0.018344356 = score(doc=2129,freq=1.0), product of:
             0.06756787 = queryWeight, product of:
               1.0506079 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.01850663 = queryNorm
             0.27149525 = fieldWeight in 2129, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.078125 = fieldNorm(doc=2129)
         0.11070574 = weight(abstract_txt:utilize in 2129) [ClassicSimilarity], result of:
           0.11070574 = score(doc=2129,freq=2.0), product of:
             0.1410908 = queryWeight, product of:
               1.0735071 = boost
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.01850663 = queryNorm
             0.78464186 = fieldWeight in 2129, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.078125 = fieldNorm(doc=2129)
         0.019503769 = weight(abstract_txt:that in 2129) [ClassicSimilarity], result of:
           0.019503769 = score(doc=2129,freq=5.0), product of:
             0.04711849 = queryWeight, product of:
               1.0745134 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.01850663 = queryNorm
             0.41393027 = fieldWeight in 2129, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.078125 = fieldNorm(doc=2129)
         0.098674 = weight(abstract_txt:resolve in 2129) [ClassicSimilarity], result of:
           0.098674 = score(doc=2129,freq=1.0), product of:
             0.16463812 = queryWeight, product of:
               1.1596335 = boost
               7.6715355 = idf(docFreq=55, maxDocs=44218)
               0.01850663 = queryNorm
             0.5993387 = fieldWeight in 2129, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.6715355 = idf(docFreq=55, maxDocs=44218)
               0.078125 = fieldNorm(doc=2129)
         0.03726962 = weight(abstract_txt:about in 2129) [ClassicSimilarity], result of:
           0.03726962 = score(doc=2129,freq=2.0), product of:
             0.08602642 = queryWeight, product of:
               1.1854589 = boost
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.01850663 = queryNorm
             0.43323454 = fieldWeight in 2129, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.078125 = fieldNorm(doc=2129)
         0.05243423 = weight(abstract_txt:relevance in 2129) [ClassicSimilarity], result of:
           0.05243423 = score(doc=2129,freq=1.0), product of:
             0.13608654 = queryWeight, product of:
               1.4910017 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.01850663 = queryNorm
             0.38530064 = fieldWeight in 2129, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.078125 = fieldNorm(doc=2129)
         0.17650145 = weight(abstract_txt:unified in 2129) [ClassicSimilarity], result of:
           0.17650145 = score(doc=2129,freq=2.0), product of:
             0.24260184 = queryWeight, product of:
               1.990754 = boost
               6.5848994 = idf(docFreq=165, maxDocs=44218)
               0.01850663 = queryNorm
             0.7275355 = fieldWeight in 2129, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.5848994 = idf(docFreq=165, maxDocs=44218)
               0.078125 = fieldNorm(doc=2129)
         0.07029112 = weight(abstract_txt:data in 2129) [ClassicSimilarity], result of:
           0.07029112 = score(doc=2129,freq=3.0), product of:
             0.15569636 = queryWeight, product of:
               2.521621 = boost
               3.3363478 = idf(docFreq=4274, maxDocs=44218)
               0.01850663 = queryNorm
             0.4514628 = fieldWeight in 2129, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.3363478 = idf(docFreq=4274, maxDocs=44218)
               0.078125 = fieldNorm(doc=2129)
         0.13771535 = weight(abstract_txt:feedback in 2129) [ClassicSimilarity], result of:
           0.13771535 = score(doc=2129,freq=1.0), product of:
             0.29654497 = queryWeight, product of:
               2.6956375 = boost
               5.9443145 = idf(docFreq=314, maxDocs=44218)
               0.01850663 = queryNorm
             0.46439958 = fieldWeight in 2129, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9443145 = idf(docFreq=314, maxDocs=44218)
               0.078125 = fieldNorm(doc=2129)
       0.36 = coord(9/25)
   

5. Wong, W.S.; Luk, R.W.P.; Leong, H.V.; Ho, K.S.; Lee, D.L.: Re-examining the effects of adding relevance information in a relevance feedback environment (2008) 0.23

   0.23424529 = sum of:
     0.23424529 = product of:
       0.5856132 = sum of:
         0.013256285 = weight(abstract_txt:used in 2084) [ClassicSimilarity], result of:
           0.013256285 = score(doc=2084,freq=1.0), product of:
             0.063138336 = queryWeight, product of:
               1.015587 = boost
               3.3592992 = idf(docFreq=4177, maxDocs=44218)
               0.01850663 = queryNorm
             0.2099562 = fieldWeight in 2084, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3592992 = idf(docFreq=4177, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
         0.020539641 = weight(abstract_txt:using in 2084) [ClassicSimilarity], result of:
           0.020539641 = score(doc=2084,freq=2.0), product of:
             0.06710123 = queryWeight, product of:
               1.0469738 = boost
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.01850663 = queryNorm
             0.30609933 = fieldWeight in 2084, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4631186 = idf(docFreq=3765, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
         0.025418686 = weight(abstract_txt:retrieval in 2084) [ClassicSimilarity], result of:
           0.025418686 = score(doc=2084,freq=3.0), product of:
             0.06756787 = queryWeight, product of:
               1.0506079 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.01850663 = queryNorm
             0.37619486 = fieldWeight in 2084, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
         0.013955761 = weight(abstract_txt:that in 2084) [ClassicSimilarity], result of:
           0.013955761 = score(doc=2084,freq=4.0), product of:
             0.04711849 = queryWeight, product of:
               1.0745134 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.01850663 = queryNorm
             0.2961844 = fieldWeight in 2084, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
         0.036516618 = weight(abstract_txt:about in 2084) [ClassicSimilarity], result of:
           0.036516618 = score(doc=2084,freq=3.0), product of:
             0.08602642 = queryWeight, product of:
               1.1854589 = boost
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.01850663 = queryNorm
             0.42448142 = fieldWeight in 2084, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
         0.042397466 = weight(abstract_txt:documents in 2084) [ClassicSimilarity], result of:
           0.042397466 = score(doc=2084,freq=3.0), product of:
             0.09503088 = queryWeight, product of:
               1.2459567 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.01850663 = queryNorm
             0.44614407 = fieldWeight in 2084, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
         0.05708593 = weight(abstract_txt:framework in 2084) [ClassicSimilarity], result of:
           0.05708593 = score(doc=2084,freq=3.0), product of:
             0.115875304 = queryWeight, product of:
               1.3758339 = boost
               4.550903 = idf(docFreq=1268, maxDocs=44218)
               0.01850663 = queryNorm
             0.49264967 = fieldWeight in 2084, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.550903 = idf(docFreq=1268, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
         0.0937972 = weight(abstract_txt:relevance in 2084) [ClassicSimilarity], result of:
           0.0937972 = score(doc=2084,freq=5.0), product of:
             0.13608654 = queryWeight, product of:
               1.4910017 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.01850663 = queryNorm
             0.6892467 = fieldWeight in 2084, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
         0.091821596 = weight(abstract_txt:mean in 2084) [ClassicSimilarity], result of:
           0.091821596 = score(doc=2084,freq=1.0), product of:
             0.22942556 = queryWeight, product of:
               1.9359381 = boost
               6.4035826 = idf(docFreq=198, maxDocs=44218)
               0.01850663 = queryNorm
             0.4002239 = fieldWeight in 2084, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.4035826 = idf(docFreq=198, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
         0.19082399 = weight(abstract_txt:feedback in 2084) [ClassicSimilarity], result of:
           0.19082399 = score(doc=2084,freq=3.0), product of:
             0.29654497 = queryWeight, product of:
               2.6956375 = boost
               5.9443145 = idf(docFreq=314, maxDocs=44218)
               0.01850663 = queryNorm
             0.6434909 = fieldWeight in 2084, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.9443145 = idf(docFreq=314, maxDocs=44218)
               0.0625 = fieldNorm(doc=2084)
       0.4 = coord(10/25)