Document (#30240)

Author

Wolfram, D.
Zhang, J.

Title

¬An investigation of the influence of indexing exhaustivity and term distributions on a document space

Source

Journal of the American Society for Information Science and Technology. 53(2002) no.11, S.944-952

Year

2002

Abstract

Wolfram and Zhang are interested in the effect of different indexing exhaustivity, by which they mean the number of terms chosen, and of different index term distributions and different term weighting methods on the resulting document cluster organization. The Distance Angle Retrieval Environment, DARE, which provides a two dimensional display of retrieved documents was used to represent the document clusters based upon a document's distance from the searcher's main interest, and on the angle formed by the document, a point representing a minor interest, and the point representing the main interest. If the centroid and the origin of the document space are assigned as major and minor points the average distance between documents and the centroid can be measured providing an indication of cluster organization. in the form of a size normalized similarity measure. Using 500 records from NTIS and nine models created by intersecting low, observed, and high exhaustivity levels (based upon a negative binomial distribution) with shallow, observed, and steep term distributions (based upon a Zipf distribution) simulation runs were preformed using inverse document frequency, inter-document term frequency, and inverse document frequency based upon both inter and intra-document frequencies. Low exhaustivity and shallow distributions result in a more dense document space and less effective retrieval. High exhaustivity and steeper distributions result in a more diffuse space.

Theme

Indexierungsstudien

Similar documents (author)

1. Zhang, J.; Wolfram, D.: Visualization of term discrimination analysis (2001) 5.19

   5.1913404 = sum of:
     5.1913404 = sum of:
       1.8025917 = weight(author_txt:zhang in 211) [ClassicSimilarity], result of:
         1.8025917 = score(doc=211,freq=1.0), product of:
           0.54880595 = queryWeight, product of:
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.08354304 = queryNorm
           3.2845702 = fieldWeight in 211, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.5 = fieldNorm(doc=211)
       3.3887486 = weight(author_txt:wolfram in 211) [ClassicSimilarity], result of:
         3.3887486 = score(doc=211,freq=1.0), product of:
           0.8359497 = queryWeight, product of:
             1.2341862 = boost
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.08354304 = queryNorm
           4.053771 = fieldWeight in 211, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.5 = fieldNorm(doc=211)
   

2. Wolfram, D.; Zhang, J.: ¬The influence of indexing practices and weighting algorithms on document spaces (2008) 5.19

   5.1913404 = sum of:
     5.1913404 = sum of:
       1.8025917 = weight(author_txt:zhang in 3964) [ClassicSimilarity], result of:
         1.8025917 = score(doc=3964,freq=1.0), product of:
           0.54880595 = queryWeight, product of:
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.08354304 = queryNorm
           3.2845702 = fieldWeight in 3964, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.5 = fieldNorm(doc=3964)
       3.3887486 = weight(author_txt:wolfram in 3964) [ClassicSimilarity], result of:
         3.3887486 = score(doc=3964,freq=1.0), product of:
           0.8359497 = queryWeight, product of:
             1.2341862 = boost
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.08354304 = queryNorm
           4.053771 = fieldWeight in 3964, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.5 = fieldNorm(doc=3964)
   

3. Wolfram, D.; Wang, P.; Zhang, J.: Identifying Web search session patterns using cluster analysis : a comparison of three search environments (2009) 3.89

   3.8935053 = sum of:
     3.8935053 = sum of:
       1.3519437 = weight(author_txt:zhang in 4797) [ClassicSimilarity], result of:
         1.3519437 = score(doc=4797,freq=1.0), product of:
           0.54880595 = queryWeight, product of:
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.08354304 = queryNorm
           2.4634275 = fieldWeight in 4797, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.375 = fieldNorm(doc=4797)
       2.5415616 = weight(author_txt:wolfram in 4797) [ClassicSimilarity], result of:
         2.5415616 = score(doc=4797,freq=1.0), product of:
           0.8359497 = queryWeight, product of:
             1.2341862 = boost
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.08354304 = queryNorm
           3.0403283 = fieldWeight in 4797, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.375 = fieldNorm(doc=4797)
   

4. Zhang, J.; Wolfram, D.; Wang, P.: Analysis of query keywords of sports-related queries using visualization and clustering (2009) 3.89

   3.8935053 = sum of:
     3.8935053 = sum of:
       1.3519437 = weight(author_txt:zhang in 4948) [ClassicSimilarity], result of:
         1.3519437 = score(doc=4948,freq=1.0), product of:
           0.54880595 = queryWeight, product of:
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.08354304 = queryNorm
           2.4634275 = fieldWeight in 4948, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.375 = fieldNorm(doc=4948)
       2.5415616 = weight(author_txt:wolfram in 4948) [ClassicSimilarity], result of:
         2.5415616 = score(doc=4948,freq=1.0), product of:
           0.8359497 = queryWeight, product of:
             1.2341862 = boost
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.08354304 = queryNorm
           3.0403283 = fieldWeight in 4948, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.375 = fieldNorm(doc=4948)
   

5. Zhang, J.; Wolfram, D.; Wang, P.; Hong, Y.; Gillis, R.: Visualization of health-subject analysis based on query term co-occurrences (2008) 3.24

   3.244588 = sum of:
     3.244588 = sum of:
       1.1266198 = weight(author_txt:zhang in 4377) [ClassicSimilarity], result of:
         1.1266198 = score(doc=4377,freq=1.0), product of:
           0.54880595 = queryWeight, product of:
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.08354304 = queryNorm
           2.0528564 = fieldWeight in 4377, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             6.5691404 = idf(docFreq=162, maxDocs=42740)
             0.3125 = fieldNorm(doc=4377)
       2.117968 = weight(author_txt:wolfram in 4377) [ClassicSimilarity], result of:
         2.117968 = score(doc=4377,freq=1.0), product of:
           0.8359497 = queryWeight, product of:
             1.2341862 = boost
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.08354304 = queryNorm
           2.533607 = fieldWeight in 4377, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.107542 = idf(docFreq=34, maxDocs=42740)
             0.3125 = fieldNorm(doc=4377)
   

Similar documents (content)

1. Zhang, J.; Wolfram, D.: Visualization of term discrimination analysis (2001) 0.37

   0.37369722 = sum of:
     0.37369722 = product of:
       0.934243 = sum of:
         0.025281856 = weight(abstract_txt:result in 211) [ClassicSimilarity], result of:
           0.025281856 = score(doc=211,freq=1.0), product of:
             0.07893256 = queryWeight, product of:
               1.0548031 = boost
               5.1247506 = idf(docFreq=690, maxDocs=42740)
               0.01460199 = queryNorm
             0.3202969 = fieldWeight in 211, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1247506 = idf(docFreq=690, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
         0.02009505 = weight(abstract_txt:different in 211) [ClassicSimilarity], result of:
           0.02009505 = score(doc=211,freq=2.0), product of:
             0.061536115 = queryWeight, product of:
               1.1406542 = boost
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.01460199 = queryNorm
             0.326557 = fieldWeight in 211, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
         0.012412779 = weight(abstract_txt:based in 211) [ClassicSimilarity], result of:
           0.012412779 = score(doc=211,freq=1.0), product of:
             0.06189272 = queryWeight, product of:
               1.3209249 = boost
               3.2088501 = idf(docFreq=4693, maxDocs=42740)
               0.01460199 = queryNorm
             0.20055313 = fieldWeight in 211, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.2088501 = idf(docFreq=4693, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
         0.053101 = weight(abstract_txt:cluster in 211) [ClassicSimilarity], result of:
           0.053101 = score(doc=211,freq=1.0), product of:
             0.12945496 = queryWeight, product of:
               1.3508362 = boost
               6.563024 = idf(docFreq=163, maxDocs=42740)
               0.01460199 = queryNorm
             0.410189 = fieldWeight in 211, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.563024 = idf(docFreq=163, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
         0.16731277 = weight(abstract_txt:angle in 211) [ClassicSimilarity], result of:
           0.16731277 = score(doc=211,freq=2.0), product of:
             0.2208308 = queryWeight, product of:
               1.7643028 = boost
               8.571848 = idf(docFreq=21, maxDocs=42740)
               0.01460199 = queryNorm
             0.75765145 = fieldWeight in 211, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.571848 = idf(docFreq=21, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
         0.15931045 = weight(abstract_txt:centroid in 211) [ClassicSimilarity], result of:
           0.15931045 = score(doc=211,freq=1.0), product of:
             0.26928556 = queryWeight, product of:
               1.9482732 = boost
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.01460199 = queryNorm
             0.5916041 = fieldWeight in 211, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.465666 = idf(docFreq=8, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
         0.13285877 = weight(abstract_txt:distance in 211) [ClassicSimilarity], result of:
           0.13285877 = score(doc=211,freq=3.0), product of:
             0.1893653 = queryWeight, product of:
               2.0009634 = boost
               6.4811068 = idf(docFreq=177, maxDocs=42740)
               0.01460199 = queryNorm
             0.7016004 = fieldWeight in 211, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.4811068 = idf(docFreq=177, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
         0.11802981 = weight(abstract_txt:space in 211) [ClassicSimilarity], result of:
           0.11802981 = score(doc=211,freq=4.0), product of:
             0.17499866 = queryWeight, product of:
               2.2211387 = boost
               5.39569 = idf(docFreq=526, maxDocs=42740)
               0.01460199 = queryNorm
             0.67446125 = fieldWeight in 211, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.39569 = idf(docFreq=526, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
         0.1182302 = weight(abstract_txt:term in 211) [ClassicSimilarity], result of:
           0.1182302 = score(doc=211,freq=5.0), product of:
             0.17519666 = queryWeight, product of:
               2.484713 = boost
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.01460199 = queryNorm
             0.6748428 = fieldWeight in 211, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
         0.12761033 = weight(abstract_txt:document in 211) [ClassicSimilarity], result of:
           0.12761033 = score(doc=211,freq=3.0), product of:
             0.27537447 = queryWeight, product of:
               4.405449 = boost
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.01460199 = queryNorm
             0.4634065 = fieldWeight in 211, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.0625 = fieldNorm(doc=211)
       0.4 = coord(10/25)
   

2. Wolfram, D.; Zhang, J.: ¬The influence of indexing practices and weighting algorithms on document spaces (2008) 0.34

   0.33872482 = sum of:
     0.33872482 = product of:
       1.0585151 = sum of:
         0.024611311 = weight(abstract_txt:different in 3964) [ClassicSimilarity], result of:
           0.024611311 = score(doc=3964,freq=3.0), product of:
             0.061536115 = queryWeight, product of:
               1.1406542 = boost
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.01460199 = queryNorm
             0.39994904 = fieldWeight in 3964, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.0625 = fieldNorm(doc=3964)
         0.012412779 = weight(abstract_txt:based in 3964) [ClassicSimilarity], result of:
           0.012412779 = score(doc=3964,freq=1.0), product of:
             0.06189272 = queryWeight, product of:
               1.3209249 = boost
               3.2088501 = idf(docFreq=4693, maxDocs=42740)
               0.01460199 = queryNorm
             0.20055313 = fieldWeight in 3964, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.2088501 = idf(docFreq=4693, maxDocs=42740)
               0.0625 = fieldNorm(doc=3964)
         0.059724923 = weight(abstract_txt:frequency in 3964) [ClassicSimilarity], result of:
           0.059724923 = score(doc=3964,freq=1.0), product of:
             0.16026956 = queryWeight, product of:
               1.8408333 = boost
               5.962447 = idf(docFreq=298, maxDocs=42740)
               0.01460199 = queryNorm
             0.37265295 = fieldWeight in 3964, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.962447 = idf(docFreq=298, maxDocs=42740)
               0.0625 = fieldNorm(doc=3964)
         0.11802981 = weight(abstract_txt:space in 3964) [ClassicSimilarity], result of:
           0.11802981 = score(doc=3964,freq=4.0), product of:
             0.17499866 = queryWeight, product of:
               2.2211387 = boost
               5.39569 = idf(docFreq=526, maxDocs=42740)
               0.01460199 = queryNorm
             0.67446125 = fieldWeight in 3964, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.39569 = idf(docFreq=526, maxDocs=42740)
               0.0625 = fieldNorm(doc=3964)
         0.05287415 = weight(abstract_txt:term in 3964) [ClassicSimilarity], result of:
           0.05287415 = score(doc=3964,freq=1.0), product of:
             0.17519666 = queryWeight, product of:
               2.484713 = boost
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.01460199 = queryNorm
             0.30179885 = fieldWeight in 3964, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.0625 = fieldNorm(doc=3964)
         0.21054801 = weight(abstract_txt:distributions in 3964) [ClassicSimilarity], result of:
           0.21054801 = score(doc=3964,freq=2.0), product of:
             0.34934485 = queryWeight, product of:
               3.5086536 = boost
               6.8187037 = idf(docFreq=126, maxDocs=42740)
               0.01460199 = queryNorm
             0.6026939 = fieldWeight in 3964, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.8187037 = idf(docFreq=126, maxDocs=42740)
               0.0625 = fieldNorm(doc=3964)
         0.39984593 = weight(abstract_txt:exhaustivity in 3964) [ClassicSimilarity], result of:
           0.39984593 = score(doc=3964,freq=2.0), product of:
             0.53573334 = queryWeight, product of:
               4.344979 = boost
               8.444015 = idf(docFreq=24, maxDocs=42740)
               0.01460199 = queryNorm
             0.7463525 = fieldWeight in 3964, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.444015 = idf(docFreq=24, maxDocs=42740)
               0.0625 = fieldNorm(doc=3964)
         0.18046826 = weight(abstract_txt:document in 3964) [ClassicSimilarity], result of:
           0.18046826 = score(doc=3964,freq=6.0), product of:
             0.27537447 = queryWeight, product of:
               4.405449 = boost
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.01460199 = queryNorm
             0.6553558 = fieldWeight in 3964, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.0625 = fieldNorm(doc=3964)
       0.32 = coord(8/25)
   

3. Ko, Y.: ¬A new term-weighting scheme for text classification using the odds of positive and negative class probabilities (2015) 0.24

   0.2351515 = sum of:
     0.2351515 = product of:
       0.73484844 = sum of:
         0.027110256 = weight(abstract_txt:high in 4340) [ClassicSimilarity], result of:
           0.027110256 = score(doc=4340,freq=1.0), product of:
             0.071263306 = queryWeight, product of:
               1.0022506 = boost
               4.8694243 = idf(docFreq=891, maxDocs=42740)
               0.01460199 = queryNorm
             0.38042378 = fieldWeight in 4340, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.8694243 = idf(docFreq=891, maxDocs=42740)
               0.078125 = fieldNorm(doc=4340)
         0.03160232 = weight(abstract_txt:result in 4340) [ClassicSimilarity], result of:
           0.03160232 = score(doc=4340,freq=1.0), product of:
             0.07893256 = queryWeight, product of:
               1.0548031 = boost
               5.1247506 = idf(docFreq=690, maxDocs=42740)
               0.01460199 = queryNorm
             0.40037113 = fieldWeight in 4340, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1247506 = idf(docFreq=690, maxDocs=42740)
               0.078125 = fieldNorm(doc=4340)
         0.025118813 = weight(abstract_txt:different in 4340) [ClassicSimilarity], result of:
           0.025118813 = score(doc=4340,freq=2.0), product of:
             0.061536115 = queryWeight, product of:
               1.1406542 = boost
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.01460199 = queryNorm
             0.40819627 = fieldWeight in 4340, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.078125 = fieldNorm(doc=4340)
         0.10534918 = weight(abstract_txt:inverse in 4340) [ClassicSimilarity], result of:
           0.10534918 = score(doc=4340,freq=1.0), product of:
             0.17614257 = queryWeight, product of:
               1.5757071 = boost
               7.655557 = idf(docFreq=54, maxDocs=42740)
               0.01460199 = queryNorm
             0.5980904 = fieldWeight in 4340, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.655557 = idf(docFreq=54, maxDocs=42740)
               0.078125 = fieldNorm(doc=4340)
         0.10557975 = weight(abstract_txt:frequency in 4340) [ClassicSimilarity], result of:
           0.10557975 = score(doc=4340,freq=2.0), product of:
             0.16026956 = queryWeight, product of:
               1.8408333 = boost
               5.962447 = idf(docFreq=298, maxDocs=42740)
               0.01460199 = queryNorm
             0.6587636 = fieldWeight in 4340, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.962447 = idf(docFreq=298, maxDocs=42740)
               0.078125 = fieldNorm(doc=4340)
         0.16189337 = weight(abstract_txt:term in 4340) [ClassicSimilarity], result of:
           0.16189337 = score(doc=4340,freq=6.0), product of:
             0.17519666 = queryWeight, product of:
               2.484713 = boost
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.01460199 = queryNorm
             0.92406654 = fieldWeight in 4340, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.078125 = fieldNorm(doc=4340)
         0.18609992 = weight(abstract_txt:distributions in 4340) [ClassicSimilarity], result of:
           0.18609992 = score(doc=4340,freq=1.0), product of:
             0.34934485 = queryWeight, product of:
               3.5086536 = boost
               6.8187037 = idf(docFreq=126, maxDocs=42740)
               0.01460199 = queryNorm
             0.5327112 = fieldWeight in 4340, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.8187037 = idf(docFreq=126, maxDocs=42740)
               0.078125 = fieldNorm(doc=4340)
         0.092094816 = weight(abstract_txt:document in 4340) [ClassicSimilarity], result of:
           0.092094816 = score(doc=4340,freq=1.0), product of:
             0.27537447 = queryWeight, product of:
               4.405449 = boost
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.01460199 = queryNorm
             0.33443484 = fieldWeight in 4340, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.078125 = fieldNorm(doc=4340)
       0.32 = coord(8/25)
   

4. Ruthven, I.; Lalmas, M.; Rijsbergen, K. van: Combining and selecting characteristics of information use (2002) 0.22

   0.22425225 = sum of:
     0.22425225 = product of:
       0.6229229 = sum of:
         0.06462729 = weight(abstract_txt:preformed in 209) [ClassicSimilarity], result of:
           0.06462729 = score(doc=209,freq=1.0), product of:
             0.14188725 = queryWeight, product of:
               9.71698 = idf(docFreq=6, maxDocs=42740)
               0.01460199 = queryNorm
             0.45548344 = fieldWeight in 209, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.71698 = idf(docFreq=6, maxDocs=42740)
               0.046875 = fieldNorm(doc=209)
         0.035191815 = weight(abstract_txt:distribution in 209) [ClassicSimilarity], result of:
           0.035191815 = score(doc=209,freq=2.0), product of:
             0.09461511 = queryWeight, product of:
               1.1548446 = boost
               5.610801 = idf(docFreq=424, maxDocs=42740)
               0.01460199 = queryNorm
             0.37194708 = fieldWeight in 209, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.610801 = idf(docFreq=424, maxDocs=42740)
               0.046875 = fieldNorm(doc=209)
         0.01316574 = weight(abstract_txt:based in 209) [ClassicSimilarity], result of:
           0.01316574 = score(doc=209,freq=2.0), product of:
             0.06189272 = queryWeight, product of:
               1.3209249 = boost
               3.2088501 = idf(docFreq=4693, maxDocs=42740)
               0.01460199 = queryNorm
             0.21271871 = fieldWeight in 209, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.2088501 = idf(docFreq=4693, maxDocs=42740)
               0.046875 = fieldNorm(doc=209)
         0.06320951 = weight(abstract_txt:inverse in 209) [ClassicSimilarity], result of:
           0.06320951 = score(doc=209,freq=1.0), product of:
             0.17614257 = queryWeight, product of:
               1.5757071 = boost
               7.655557 = idf(docFreq=54, maxDocs=42740)
               0.01460199 = queryNorm
             0.35885423 = fieldWeight in 209, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.655557 = idf(docFreq=54, maxDocs=42740)
               0.046875 = fieldNorm(doc=209)
         0.077584945 = weight(abstract_txt:frequency in 209) [ClassicSimilarity], result of:
           0.077584945 = score(doc=209,freq=3.0), product of:
             0.16026956 = queryWeight, product of:
               1.8408333 = boost
               5.962447 = idf(docFreq=298, maxDocs=42740)
               0.01460199 = queryNorm
             0.48409036 = fieldWeight in 209, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.962447 = idf(docFreq=298, maxDocs=42740)
               0.046875 = fieldNorm(doc=209)
         0.057529535 = weight(abstract_txt:distance in 209) [ClassicSimilarity], result of:
           0.057529535 = score(doc=209,freq=1.0), product of:
             0.1893653 = queryWeight, product of:
               2.0009634 = boost
               6.4811068 = idf(docFreq=177, maxDocs=42740)
               0.01460199 = queryNorm
             0.3038019 = fieldWeight in 209, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.4811068 = idf(docFreq=177, maxDocs=42740)
               0.046875 = fieldNorm(doc=209)
         0.05040505 = weight(abstract_txt:upon in 209) [ClassicSimilarity], result of:
           0.05040505 = score(doc=209,freq=1.0), product of:
             0.19083972 = queryWeight, product of:
               2.3194911 = boost
               5.634612 = idf(docFreq=414, maxDocs=42740)
               0.01460199 = queryNorm
             0.26412243 = fieldWeight in 209, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.634612 = idf(docFreq=414, maxDocs=42740)
               0.046875 = fieldNorm(doc=209)
         0.10491888 = weight(abstract_txt:term in 209) [ClassicSimilarity], result of:
           0.10491888 = score(doc=209,freq=7.0), product of:
             0.17519666 = queryWeight, product of:
               2.484713 = boost
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.01460199 = queryNorm
             0.5988635 = fieldWeight in 209, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.046875 = fieldNorm(doc=209)
         0.1562901 = weight(abstract_txt:document in 209) [ClassicSimilarity], result of:
           0.1562901 = score(doc=209,freq=8.0), product of:
             0.27537447 = queryWeight, product of:
               4.405449 = boost
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.01460199 = queryNorm
             0.5675548 = fieldWeight in 209, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.046875 = fieldNorm(doc=209)
       0.36 = coord(9/25)
   

5. Burgin, R.: ¬The effect of indexing exhaustivity on retrieval performance (1991) 0.20

   0.20255528 = sum of:
     0.20255528 = product of:
       0.8439804 = sum of:
         0.017761683 = weight(abstract_txt:different in 178) [ClassicSimilarity], result of:
           0.017761683 = score(doc=178,freq=1.0), product of:
             0.061536115 = queryWeight, product of:
               1.1406542 = boost
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.01460199 = queryNorm
             0.28863835 = fieldWeight in 178, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.694571 = idf(docFreq=2887, maxDocs=42740)
               0.078125 = fieldNorm(doc=178)
         0.015515974 = weight(abstract_txt:based in 178) [ClassicSimilarity], result of:
           0.015515974 = score(doc=178,freq=1.0), product of:
             0.06189272 = queryWeight, product of:
               1.3209249 = boost
               3.2088501 = idf(docFreq=4693, maxDocs=42740)
               0.01460199 = queryNorm
             0.2506914 = fieldWeight in 178, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.2088501 = idf(docFreq=4693, maxDocs=42740)
               0.078125 = fieldNorm(doc=178)
         0.1043246 = weight(abstract_txt:space in 178) [ClassicSimilarity], result of:
           0.1043246 = score(doc=178,freq=2.0), product of:
             0.17499866 = queryWeight, product of:
               2.2211387 = boost
               5.39569 = idf(docFreq=526, maxDocs=42740)
               0.01460199 = queryNorm
             0.59614515 = fieldWeight in 178, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.39569 = idf(docFreq=526, maxDocs=42740)
               0.078125 = fieldNorm(doc=178)
         0.11447589 = weight(abstract_txt:term in 178) [ClassicSimilarity], result of:
           0.11447589 = score(doc=178,freq=3.0), product of:
             0.17519666 = queryWeight, product of:
               2.484713 = boost
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.01460199 = queryNorm
             0.65341365 = fieldWeight in 178, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.8287816 = idf(docFreq=928, maxDocs=42740)
               0.078125 = fieldNorm(doc=178)
         0.4998074 = weight(abstract_txt:exhaustivity in 178) [ClassicSimilarity], result of:
           0.4998074 = score(doc=178,freq=2.0), product of:
             0.53573334 = queryWeight, product of:
               4.344979 = boost
               8.444015 = idf(docFreq=24, maxDocs=42740)
               0.01460199 = queryNorm
             0.9329406 = fieldWeight in 178, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.444015 = idf(docFreq=24, maxDocs=42740)
               0.078125 = fieldNorm(doc=178)
         0.092094816 = weight(abstract_txt:document in 178) [ClassicSimilarity], result of:
           0.092094816 = score(doc=178,freq=1.0), product of:
             0.27537447 = queryWeight, product of:
               4.405449 = boost
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.01460199 = queryNorm
             0.33443484 = fieldWeight in 178, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.280766 = idf(docFreq=1606, maxDocs=42740)
               0.078125 = fieldNorm(doc=178)
       0.24 = coord(6/25)