Document (#27508)

Author

Muresan, G.
Harper, D.J.

Title

Topic modeling for mediated access to very large document collections

Source

Journal of the American Society for Information Science and Technology. 55(2004) no.10, S.892-910

Year

2004

Abstract

Clear and precise queries are a necessity when searching very large document collections, especially when query-based retrieval is the only means of exploration. We propose system-mediated information access as a solution for users' well-documented inability to formulate good queries. Our approach is based an two main assumptions: first, an the ability of document clustering to reveal the topical, semantic structure of a problem domain represented by a specialized "source collection," and, second, an the capacity of statistical language models to convey content. Taking the role of the human mediator or intermediary searcher, a mediation system interacts with the user and supports her exploration of a relatively small source collection, chosen to be representative for the problem domain. Based an the user's selection of relevant "exemplary" documents and clusters from this source collection, the system builds a language model of her information need. This model is subsequently used to derive "mediated queries," which are expected to convey precisely and comprehensively the user's information need, and can be submitted by the user to search any large and heterogeneous "target collections." We present results of experiments that simulated various mediation strategies and compared the effect an mediation effectiveness of a variety of parameters, such as the similarity measure, the weighting scheme, and the clustering method. They provide both upperbounds of performance that can potentially be reached by real end users and a comparison between the effectiveness of these strategies. The experimental evidence suggests that information retrieval mediated through a clustered specialized collection has potential to improve effectiveness significantly.

Footnote

Beitrag innerhalb der special topic section des Heftes: "Document search interface design"

Similar documents (author)

1. Muresan, S.; Klavans, J.L.: Inducing terminologies from text : a case study for the consumer health domain (2013) 1.90

   1.90043 = sum of:
     1.90043 = product of:
       3.80086 = sum of:
         3.80086 = weight(author_txt:muresan in 1682) [ClassicSimilarity], result of:
           3.80086 = score(doc=1682,freq=1.0), product of:
             0.76709825 = queryWeight, product of:
               1.0934958 = boost
               9.909708 = idf(docFreq=5, maxDocs=44421)
               0.07079018 = queryNorm
             4.954854 = fieldWeight in 1682, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.909708 = idf(docFreq=5, maxDocs=44421)
               0.5 = fieldNorm(doc=1682)
       0.5 = coord(1/2)
   

2. Harper, D.J.: Relevance feedback in document retrieval (1980) 1.82

   1.8168141 = sum of:
     1.8168141 = product of:
       3.6336281 = sum of:
         3.6336281 = weight(author_txt:harper in 5866) [ClassicSimilarity], result of:
           3.6336281 = score(doc=5866,freq=1.0), product of:
             0.6415297 = queryWeight, product of:
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.07079018 = queryNorm
             5.664006 = fieldWeight in 5866, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.625 = fieldNorm(doc=5866)
       0.5 = coord(1/2)
   

3. Lee, H.-J.; Muresan, G.: Mediated Web information retrieval for a complex searching task (2009) 1.66

   1.6628762 = sum of:
     1.6628762 = product of:
       3.3257525 = sum of:
         3.3257525 = weight(author_txt:muresan in 3937) [ClassicSimilarity], result of:
           3.3257525 = score(doc=3937,freq=1.0), product of:
             0.76709825 = queryWeight, product of:
               1.0934958 = boost
               9.909708 = idf(docFreq=5, maxDocs=44421)
               0.07079018 = queryNorm
             4.3354974 = fieldWeight in 3937, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.909708 = idf(docFreq=5, maxDocs=44421)
               0.4375 = fieldNorm(doc=3937)
       0.5 = coord(1/2)
   

4. McAllister-Harper, D.: ¬An analysis of courses in cataloging and classification and related areas offered in sixteen graduate library schools and their relationship to present and future trends in cataloging and classification and to cognitive needs of professional academic catalogers (1993) 1.45

   1.4534513 = sum of:
     1.4534513 = product of:
       2.9069026 = sum of:
         2.9069026 = weight(author_txt:harper in 5608) [ClassicSimilarity], result of:
           2.9069026 = score(doc=5608,freq=1.0), product of:
             0.6415297 = queryWeight, product of:
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.07079018 = queryNorm
             4.531205 = fieldWeight in 5608, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.5 = fieldNorm(doc=5608)
       0.5 = coord(1/2)
   

5. McAllister-Harper, D.: Dewey Decimal Classification in the online environment : a study of libraries in North Carolina (1990) 1.45

   1.4534513 = sum of:
     1.4534513 = product of:
       2.9069026 = sum of:
         2.9069026 = weight(author_txt:harper in 3642) [ClassicSimilarity], result of:
           2.9069026 = score(doc=3642,freq=1.0), product of:
             0.6415297 = queryWeight, product of:
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.07079018 = queryNorm
             4.531205 = fieldWeight in 3642, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.06241 = idf(docFreq=13, maxDocs=44421)
               0.5 = fieldNorm(doc=3642)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Lee, H.-J.; Muresan, G.: Mediated Web information retrieval for a complex searching task (2009) 0.23

   0.23055837 = sum of:
     0.23055837 = product of:
       0.64043987 = sum of:
         0.025826925 = weight(abstract_txt:problem in 3937) [ClassicSimilarity], result of:
           0.025826925 = score(doc=3937,freq=1.0), product of:
             0.09266542 = queryWeight, product of:
               1.041186 = boost
               4.4593854 = idf(docFreq=1396, maxDocs=44421)
               0.019957878 = queryNorm
             0.2787116 = fieldWeight in 3937, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4593854 = idf(docFreq=1396, maxDocs=44421)
               0.0625 = fieldNorm(doc=3937)
         0.043554433 = weight(abstract_txt:domain in 3937) [ClassicSimilarity], result of:
           0.043554433 = score(doc=3937,freq=2.0), product of:
             0.104203135 = queryWeight, product of:
               1.1041037 = boost
               4.7288613 = idf(docFreq=1066, maxDocs=44421)
               0.019957878 = queryNorm
             0.41797623 = fieldWeight in 3937, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7288613 = idf(docFreq=1066, maxDocs=44421)
               0.0625 = fieldNorm(doc=3937)
         0.008243869 = weight(abstract_txt:information in 3937) [ClassicSimilarity], result of:
           0.008243869 = score(doc=3937,freq=1.0), product of:
             0.05452972 = queryWeight, product of:
               1.1295387 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.019957878 = queryNorm
             0.15118122 = fieldWeight in 3937, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.0625 = fieldNorm(doc=3937)
         0.029030979 = weight(abstract_txt:system in 3937) [ClassicSimilarity], result of:
           0.029030979 = score(doc=3937,freq=3.0), product of:
             0.07951218 = queryWeight, product of:
               1.181223 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.019957878 = queryNorm
             0.36511362 = fieldWeight in 3937, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.0625 = fieldNorm(doc=3937)
         0.08135172 = weight(abstract_txt:user's in 3937) [ClassicSimilarity], result of:
           0.08135172 = score(doc=3937,freq=2.0), product of:
             0.15804122 = queryWeight, product of:
               1.3597362 = boost
               5.823732 = idf(docFreq=356, maxDocs=44421)
               0.019957878 = queryNorm
             0.51475 = fieldWeight in 3937, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.823732 = idf(docFreq=356, maxDocs=44421)
               0.0625 = fieldNorm(doc=3937)
         0.034591593 = weight(abstract_txt:document in 3937) [ClassicSimilarity], result of:
           0.034591593 = score(doc=3937,freq=1.0), product of:
             0.12888825 = queryWeight, product of:
               1.5039097 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.019957878 = queryNorm
             0.26838437 = fieldWeight in 3937, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=3937)
         0.05781899 = weight(abstract_txt:effectiveness in 3937) [ClassicSimilarity], result of:
           0.05781899 = score(doc=3937,freq=1.0), product of:
             0.18152925 = queryWeight, product of:
               1.7847953 = boost
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.019957878 = queryNorm
             0.3185106 = fieldWeight in 3937, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.0625 = fieldNorm(doc=3937)
         0.05855012 = weight(abstract_txt:collection in 3937) [ClassicSimilarity], result of:
           0.05855012 = score(doc=3937,freq=1.0), product of:
             0.20147958 = queryWeight, product of:
               2.1712008 = boost
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.019957878 = queryNorm
             0.29060075 = fieldWeight in 3937, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.0625 = fieldNorm(doc=3937)
         0.30147126 = weight(abstract_txt:mediation in 3937) [ClassicSimilarity], result of:
           0.30147126 = score(doc=3937,freq=2.0), product of:
             0.4332317 = queryWeight, product of:
               2.757244 = boost
               7.872826 = idf(docFreq=45, maxDocs=44421)
               0.019957878 = queryNorm
             0.6958661 = fieldWeight in 3937, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.872826 = idf(docFreq=45, maxDocs=44421)
               0.0625 = fieldNorm(doc=3937)
       0.36 = coord(9/25)
   

2. Burgin, R.: ¬The retrieval effectiveness of 5 clustering algorithms as a function of indexing exhaustivity (1995) 0.17

   0.16951786 = sum of:
     0.16951786 = product of:
       0.5297433 = sum of:
         0.024402834 = weight(abstract_txt:based in 3433) [ClassicSimilarity], result of:
           0.024402834 = score(doc=3433,freq=3.0), product of:
             0.07081948 = queryWeight, product of:
               1.1147859 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.019957878 = queryNorm
             0.344578 = fieldWeight in 3433, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.0625 = fieldNorm(doc=3433)
         0.016761044 = weight(abstract_txt:system in 3433) [ClassicSimilarity], result of:
           0.016761044 = score(doc=3433,freq=1.0), product of:
             0.07951218 = queryWeight, product of:
               1.181223 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.019957878 = queryNorm
             0.21079844 = fieldWeight in 3433, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.0625 = fieldNorm(doc=3433)
         0.038950127 = weight(abstract_txt:strategies in 3433) [ClassicSimilarity], result of:
           0.038950127 = score(doc=3433,freq=1.0), product of:
             0.12186392 = queryWeight, product of:
               1.1940074 = boost
               5.113918 = idf(docFreq=725, maxDocs=44421)
               0.019957878 = queryNorm
             0.31961986 = fieldWeight in 3433, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.113918 = idf(docFreq=725, maxDocs=44421)
               0.0625 = fieldNorm(doc=3433)
         0.17173862 = weight(abstract_txt:clustering in 3433) [ClassicSimilarity], result of:
           0.17173862 = score(doc=3433,freq=6.0), product of:
             0.18032838 = queryWeight, product of:
               1.4524511 = boost
               6.2208285 = idf(docFreq=239, maxDocs=44421)
               0.019957878 = queryNorm
             0.952366 = fieldWeight in 3433, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.2208285 = idf(docFreq=239, maxDocs=44421)
               0.0625 = fieldNorm(doc=3433)
         0.05991439 = weight(abstract_txt:document in 3433) [ClassicSimilarity], result of:
           0.05991439 = score(doc=3433,freq=3.0), product of:
             0.12888825 = queryWeight, product of:
               1.5039097 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.019957878 = queryNorm
             0.46485534 = fieldWeight in 3433, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=3433)
         0.038298134 = weight(abstract_txt:large in 3433) [ClassicSimilarity], result of:
           0.038298134 = score(doc=3433,freq=1.0), product of:
             0.13793825 = queryWeight, product of:
               1.5558132 = boost
               4.4423513 = idf(docFreq=1420, maxDocs=44421)
               0.019957878 = queryNorm
             0.27764696 = fieldWeight in 3433, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4423513 = idf(docFreq=1420, maxDocs=44421)
               0.0625 = fieldNorm(doc=3433)
         0.06404018 = weight(abstract_txt:collections in 3433) [ClassicSimilarity], result of:
           0.06404018 = score(doc=3433,freq=2.0), product of:
             0.15423797 = queryWeight, product of:
               1.6451699 = boost
               4.6974936 = idf(docFreq=1100, maxDocs=44421)
               0.019957878 = queryNorm
             0.4152037 = fieldWeight in 3433, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.6974936 = idf(docFreq=1100, maxDocs=44421)
               0.0625 = fieldNorm(doc=3433)
         0.11563798 = weight(abstract_txt:effectiveness in 3433) [ClassicSimilarity], result of:
           0.11563798 = score(doc=3433,freq=4.0), product of:
             0.18152925 = queryWeight, product of:
               1.7847953 = boost
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.019957878 = queryNorm
             0.6370212 = fieldWeight in 3433, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.0625 = fieldNorm(doc=3433)
       0.32 = coord(8/25)
   

3. Srinivasan, P.: Query expansion and MEDLINE (1996) 0.17

   0.1656504 = sum of:
     0.1656504 = product of:
       0.69021 = sum of:
         0.029331826 = weight(abstract_txt:system in 67) [ClassicSimilarity], result of:
           0.029331826 = score(doc=67,freq=1.0), product of:
             0.07951218 = queryWeight, product of:
               1.181223 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.019957878 = queryNorm
             0.36889726 = fieldWeight in 67, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.109375 = fieldNorm(doc=67)
         0.096396655 = weight(abstract_txt:strategies in 67) [ClassicSimilarity], result of:
           0.096396655 = score(doc=67,freq=2.0), product of:
             0.12186392 = queryWeight, product of:
               1.1940074 = boost
               5.113918 = idf(docFreq=725, maxDocs=44421)
               0.019957878 = queryNorm
             0.79101884 = fieldWeight in 67, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.113918 = idf(docFreq=725, maxDocs=44421)
               0.109375 = fieldNorm(doc=67)
         0.100667626 = weight(abstract_txt:user's in 67) [ClassicSimilarity], result of:
           0.100667626 = score(doc=67,freq=1.0), product of:
             0.15804122 = queryWeight, product of:
               1.3597362 = boost
               5.823732 = idf(docFreq=356, maxDocs=44421)
               0.019957878 = queryNorm
             0.6369707 = fieldWeight in 67, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.823732 = idf(docFreq=356, maxDocs=44421)
               0.109375 = fieldNorm(doc=67)
         0.14309469 = weight(abstract_txt:effectiveness in 67) [ClassicSimilarity], result of:
           0.14309469 = score(doc=67,freq=2.0), product of:
             0.18152925 = queryWeight, product of:
               1.7847953 = boost
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.019957878 = queryNorm
             0.78827345 = fieldWeight in 67, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.109375 = fieldNorm(doc=67)
         0.17581508 = weight(abstract_txt:queries in 67) [ClassicSimilarity], result of:
           0.17581508 = score(doc=67,freq=3.0), product of:
             0.18191616 = queryWeight, product of:
               1.7866963 = boost
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.019957878 = queryNorm
             0.96646214 = fieldWeight in 67, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.109375 = fieldNorm(doc=67)
         0.14490414 = weight(abstract_txt:collection in 67) [ClassicSimilarity], result of:
           0.14490414 = score(doc=67,freq=2.0), product of:
             0.20147958 = queryWeight, product of:
               2.1712008 = boost
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.019957878 = queryNorm
             0.71920013 = fieldWeight in 67, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.109375 = fieldNorm(doc=67)
       0.24 = coord(6/25)
   

4. Strzalkowski, T.: Natural language information retrieval (1995) 0.16

   0.16173431 = sum of:
     0.16173431 = product of:
       0.44926196 = sum of:
         0.038497046 = weight(abstract_txt:domain in 1982) [ClassicSimilarity], result of:
           0.038497046 = score(doc=1982,freq=1.0), product of:
             0.104203135 = queryWeight, product of:
               1.1041037 = boost
               4.7288613 = idf(docFreq=1066, maxDocs=44421)
               0.019957878 = queryNorm
             0.36944228 = fieldWeight in 1982, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7288613 = idf(docFreq=1066, maxDocs=44421)
               0.078125 = fieldNorm(doc=1982)
         0.01761123 = weight(abstract_txt:based in 1982) [ClassicSimilarity], result of:
           0.01761123 = score(doc=1982,freq=1.0), product of:
             0.07081948 = queryWeight, product of:
               1.1147859 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.019957878 = queryNorm
             0.24867775 = fieldWeight in 1982, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.078125 = fieldNorm(doc=1982)
         0.010304837 = weight(abstract_txt:information in 1982) [ClassicSimilarity], result of:
           0.010304837 = score(doc=1982,freq=1.0), product of:
             0.05452972 = queryWeight, product of:
               1.1295387 = boost
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.019957878 = queryNorm
             0.18897653 = fieldWeight in 1982, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4188995 = idf(docFreq=10748, maxDocs=44421)
               0.078125 = fieldNorm(doc=1982)
         0.036288723 = weight(abstract_txt:system in 1982) [ClassicSimilarity], result of:
           0.036288723 = score(doc=1982,freq=3.0), product of:
             0.07951218 = queryWeight, product of:
               1.181223 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.019957878 = queryNorm
             0.45639202 = fieldWeight in 1982, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.078125 = fieldNorm(doc=1982)
         0.07190545 = weight(abstract_txt:user's in 1982) [ClassicSimilarity], result of:
           0.07190545 = score(doc=1982,freq=1.0), product of:
             0.15804122 = queryWeight, product of:
               1.3597362 = boost
               5.823732 = idf(docFreq=356, maxDocs=44421)
               0.019957878 = queryNorm
             0.45497906 = fieldWeight in 1982, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.823732 = idf(docFreq=356, maxDocs=44421)
               0.078125 = fieldNorm(doc=1982)
         0.04323949 = weight(abstract_txt:document in 1982) [ClassicSimilarity], result of:
           0.04323949 = score(doc=1982,freq=1.0), product of:
             0.12888825 = queryWeight, product of:
               1.5039097 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.019957878 = queryNorm
             0.33548045 = fieldWeight in 1982, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.078125 = fieldNorm(doc=1982)
         0.056604054 = weight(abstract_txt:collections in 1982) [ClassicSimilarity], result of:
           0.056604054 = score(doc=1982,freq=1.0), product of:
             0.15423797 = queryWeight, product of:
               1.6451699 = boost
               4.6974936 = idf(docFreq=1100, maxDocs=44421)
               0.019957878 = queryNorm
             0.3669917 = fieldWeight in 1982, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6974936 = idf(docFreq=1100, maxDocs=44421)
               0.078125 = fieldNorm(doc=1982)
         0.07227373 = weight(abstract_txt:effectiveness in 1982) [ClassicSimilarity], result of:
           0.07227373 = score(doc=1982,freq=1.0), product of:
             0.18152925 = queryWeight, product of:
               1.7847953 = boost
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.019957878 = queryNorm
             0.39813823 = fieldWeight in 1982, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.078125 = fieldNorm(doc=1982)
         0.10253744 = weight(abstract_txt:queries in 1982) [ClassicSimilarity], result of:
           0.10253744 = score(doc=1982,freq=2.0), product of:
             0.18191616 = queryWeight, product of:
               1.7866963 = boost
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.019957878 = queryNorm
             0.56365216 = fieldWeight in 1982, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.078125 = fieldNorm(doc=1982)
       0.36 = coord(9/25)
   

5. Falchi, F.; Lucchese, C.; Orlando, S.; Perego, R.; Rabitti, F.: Similarity caching in large-scale image retrieval (2012) 0.16

   0.15521109 = sum of:
     0.15521109 = product of:
       0.4311419 = sum of:
         0.02259856 = weight(abstract_txt:problem in 3729) [ClassicSimilarity], result of:
           0.02259856 = score(doc=3729,freq=1.0), product of:
             0.09266542 = queryWeight, product of:
               1.041186 = boost
               4.4593854 = idf(docFreq=1396, maxDocs=44421)
               0.019957878 = queryNorm
             0.24387264 = fieldWeight in 3729, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4593854 = idf(docFreq=1396, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3729)
         0.024655722 = weight(abstract_txt:based in 3729) [ClassicSimilarity], result of:
           0.024655722 = score(doc=3729,freq=4.0), product of:
             0.07081948 = queryWeight, product of:
               1.1147859 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.019957878 = queryNorm
             0.34814885 = fieldWeight in 3729, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3729)
         0.042990874 = weight(abstract_txt:very in 3729) [ClassicSimilarity], result of:
           0.042990874 = score(doc=3729,freq=2.0), product of:
             0.11292012 = queryWeight, product of:
               1.1493574 = boost
               4.922683 = idf(docFreq=878, maxDocs=44421)
               0.019957878 = queryNorm
             0.38071933 = fieldWeight in 3729, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.922683 = idf(docFreq=878, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3729)
         0.029331826 = weight(abstract_txt:system in 3729) [ClassicSimilarity], result of:
           0.029331826 = score(doc=3729,freq=4.0), product of:
             0.07951218 = queryWeight, product of:
               1.181223 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.019957878 = queryNorm
             0.36889726 = fieldWeight in 3729, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3729)
         0.047391526 = weight(abstract_txt:large in 3729) [ClassicSimilarity], result of:
           0.047391526 = score(doc=3729,freq=2.0), product of:
             0.13793825 = queryWeight, product of:
               1.5558132 = boost
               4.4423513 = idf(docFreq=1420, maxDocs=44421)
               0.019957878 = queryNorm
             0.3435706 = fieldWeight in 3729, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.4423513 = idf(docFreq=1420, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3729)
         0.039622836 = weight(abstract_txt:collections in 3729) [ClassicSimilarity], result of:
           0.039622836 = score(doc=3729,freq=1.0), product of:
             0.15423797 = queryWeight, product of:
               1.6451699 = boost
               4.6974936 = idf(docFreq=1100, maxDocs=44421)
               0.019957878 = queryNorm
             0.25689417 = fieldWeight in 3729, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6974936 = idf(docFreq=1100, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3729)
         0.050591618 = weight(abstract_txt:effectiveness in 3729) [ClassicSimilarity], result of:
           0.050591618 = score(doc=3729,freq=1.0), product of:
             0.18152925 = queryWeight, product of:
               1.7847953 = boost
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.019957878 = queryNorm
             0.27869678 = fieldWeight in 3729, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.0961695 = idf(docFreq=738, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3729)
         0.10150689 = weight(abstract_txt:queries in 3729) [ClassicSimilarity], result of:
           0.10150689 = score(doc=3729,freq=4.0), product of:
             0.18191616 = queryWeight, product of:
               1.7866963 = boost
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.019957878 = queryNorm
             0.5579872 = fieldWeight in 3729, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3729)
         0.07245207 = weight(abstract_txt:collection in 3729) [ClassicSimilarity], result of:
           0.07245207 = score(doc=3729,freq=2.0), product of:
             0.20147958 = queryWeight, product of:
               2.1712008 = boost
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.019957878 = queryNorm
             0.35960007 = fieldWeight in 3729, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3729)
       0.36 = coord(9/25)