Document (#6180)

Author

Bollmann-Sdorra, P.
Raghavan, V.V.

Title

On the delusiveness of adopting a common space for modelling IR objects : are queries documents?

Source

Journal of the American Society for Information Science. 44(1993) no.10, S.579-587

Year

1993

Abstract

Many authors, who adopt the vector space model, take the view that documents, terms, queries, etc., are all elements within the same (conceptual) space. This view seems to be a natural one, given that documents and queries have the same vector notation. We show, however, that the structure of the query space can be very different from that of the document space. To this end, concepts like preference, similarity, term independence, and linearity, both in the document space and in the query space, are discussed. Our conclusion is that a more realistic and complete view of IR is obtained if we do not consider documents and queries to be elements of the same space. This conclusion implies that certain restrictions usually applied in the design of an IR system are obviated. For example, the retrieval function need not be interpreted as a similarity measure

Similar documents (author)

1. Bollmann-Sdorra, P.; Raghavan, V.V.: On the necessity of term dependence in a query space for weighted retrieval (1998) 5.42

   5.416754 = sum of:
     5.416754 = sum of:
       2.2038374 = weight(author_txt:raghavan in 3158) [ClassicSimilarity], result of:
         2.2038374 = score(doc=3158,freq=1.0), product of:
           0.61393875 = queryWeight, product of:
             8.20496 = idf(docFreq=32, maxDocs=44421)
             0.07482532 = queryNorm
           3.58967 = fieldWeight in 3158, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.20496 = idf(docFreq=32, maxDocs=44421)
             0.4375 = fieldNorm(doc=3158)
       3.2129164 = weight(author_txt:bollmann in 3158) [ClassicSimilarity], result of:
         3.2129164 = score(doc=3158,freq=1.0), product of:
           0.78935367 = queryWeight, product of:
             1.1338962 = boost
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.07482532 = queryNorm
           4.070313 = fieldWeight in 3158, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.4375 = fieldNorm(doc=3158)
   

2. Raghavan, V.V.; Jung, G.S.; Bollmann, P.: ¬A critical investigation of recall and precision as measures of retrieval system performance (1989) 4.64

   4.642932 = sum of:
     4.642932 = sum of:
       1.8890035 = weight(author_txt:raghavan in 3674) [ClassicSimilarity], result of:
         1.8890035 = score(doc=3674,freq=1.0), product of:
           0.61393875 = queryWeight, product of:
             8.20496 = idf(docFreq=32, maxDocs=44421)
             0.07482532 = queryNorm
           3.07686 = fieldWeight in 3674, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.20496 = idf(docFreq=32, maxDocs=44421)
             0.375 = fieldNorm(doc=3674)
       2.7539284 = weight(author_txt:bollmann in 3674) [ClassicSimilarity], result of:
         2.7539284 = score(doc=3674,freq=1.0), product of:
           0.78935367 = queryWeight, product of:
             1.1338962 = boost
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.07482532 = queryNorm
           3.4888396 = fieldWeight in 3674, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.303573 = idf(docFreq=10, maxDocs=44421)
             0.375 = fieldNorm(doc=3674)
   

3. Bollmann, E.: Conspectus : ein Konzept zur Kooperation zwischen Bibliotheken (1989) 2.29

   2.2949405 = sum of:
     2.2949405 = product of:
       4.589881 = sum of:
         4.589881 = weight(author_txt:bollmann in 99) [ClassicSimilarity], result of:
           4.589881 = score(doc=99,freq=1.0), product of:
             0.78935367 = queryWeight, product of:
               1.1338962 = boost
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.07482532 = queryNorm
             5.814733 = fieldWeight in 99, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.625 = fieldNorm(doc=99)
       0.5 = coord(1/2)
   

4. Bollmann, P.: Probleme des Messens und Bewertens beim Information-Retrieval (1982) 2.29

   2.2949405 = sum of:
     2.2949405 = product of:
       4.589881 = sum of:
         4.589881 = weight(author_txt:bollmann in 495) [ClassicSimilarity], result of:
           4.589881 = score(doc=495,freq=1.0), product of:
             0.78935367 = queryWeight, product of:
               1.1338962 = boost
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.07482532 = queryNorm
             5.814733 = fieldWeight in 495, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.625 = fieldNorm(doc=495)
       0.5 = coord(1/2)
   

5. Bollmann-Sdorra, P.: Probleme der Validität bei Retrievaltests (1990) 1.84

   1.8359523 = sum of:
     1.8359523 = product of:
       3.6719046 = sum of:
         3.6719046 = weight(author_txt:bollmann in 5112) [ClassicSimilarity], result of:
           3.6719046 = score(doc=5112,freq=1.0), product of:
             0.78935367 = queryWeight, product of:
               1.1338962 = boost
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.07482532 = queryNorm
             4.6517863 = fieldWeight in 5112, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.5 = fieldNorm(doc=5112)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Bollmann-Sdorra, P.; Raghavan, V.V.: On the necessity of term dependence in a query space for weighted retrieval (1998) 0.74

   0.7417264 = sum of:
     0.7417264 = product of:
       1.426397 = sum of:
         0.009960824 = weight(abstract_txt:this in 3158) [ClassicSimilarity], result of:
           0.009960824 = score(doc=3158,freq=2.0), product of:
             0.046834107 = queryWeight, product of:
               1.180642 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.016485648 = queryNorm
             0.21268311 = fieldWeight in 3158, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.07231121 = weight(abstract_txt:realistic in 3158) [ClassicSimilarity], result of:
           0.07231121 = score(doc=3158,freq=1.0), product of:
             0.15339296 = queryWeight, product of:
               1.2336137 = boost
               7.5425844 = idf(docFreq=63, maxDocs=44421)
               0.016485648 = queryNorm
             0.47141153 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5425844 = idf(docFreq=63, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.20664556 = weight(abstract_txt:independence in 3158) [ClassicSimilarity], result of:
           0.20664556 = score(doc=3158,freq=6.0), product of:
             0.16999467 = queryWeight, product of:
               1.298656 = boost
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.016485648 = queryNorm
             1.2156003 = fieldWeight in 3158, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.05967489 = weight(abstract_txt:document in 3158) [ClassicSimilarity], result of:
           0.05967489 = score(doc=3158,freq=5.0), product of:
             0.09943732 = queryWeight, product of:
               1.4046438 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016485648 = queryNorm
             0.6001257 = fieldWeight in 3158, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.088728465 = weight(abstract_txt:query in 3158) [ClassicSimilarity], result of:
           0.088728465 = score(doc=3158,freq=6.0), product of:
             0.121899866 = queryWeight, product of:
               1.5552245 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.016485648 = queryNorm
             0.72787994 = fieldWeight in 3158, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.048974752 = weight(abstract_txt:elements in 3158) [ClassicSimilarity], result of:
           0.048974752 = score(doc=3158,freq=1.0), product of:
             0.14904812 = queryWeight, product of:
               1.7197081 = boost
               5.257336 = idf(docFreq=628, maxDocs=44421)
               0.016485648 = queryNorm
             0.3285835 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.257336 = idf(docFreq=628, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.09340167 = weight(abstract_txt:vector in 3158) [ClassicSimilarity], result of:
           0.09340167 = score(doc=3158,freq=1.0), product of:
             0.22921766 = queryWeight, product of:
               2.13263 = boost
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.016485648 = queryNorm
             0.40748024 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.032758933 = weight(abstract_txt:that in 3158) [ClassicSimilarity], result of:
           0.032758933 = score(doc=3158,freq=6.0), product of:
             0.09048046 = queryWeight, product of:
               2.3207562 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.016485648 = queryNorm
             0.3620553 = fieldWeight in 3158, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.053910077 = weight(abstract_txt:same in 3158) [ClassicSimilarity], result of:
           0.053910077 = score(doc=3158,freq=1.0), product of:
             0.18189554 = queryWeight, product of:
               2.3267415 = boost
               4.7420692 = idf(docFreq=1052, maxDocs=44421)
               0.016485648 = queryNorm
             0.29637933 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7420692 = idf(docFreq=1052, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.06369257 = weight(abstract_txt:view in 3158) [ClassicSimilarity], result of:
           0.06369257 = score(doc=3158,freq=1.0), product of:
             0.2032831 = queryWeight, product of:
               2.4597318 = boost
               5.013113 = idf(docFreq=802, maxDocs=44421)
               0.016485648 = queryNorm
             0.31331956 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.013113 = idf(docFreq=802, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.047254894 = weight(abstract_txt:documents in 3158) [ClassicSimilarity], result of:
           0.047254894 = score(doc=3158,freq=1.0), product of:
             0.1833663 = queryWeight, product of:
               2.6975298 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.016485648 = queryNorm
             0.25770763 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.089500114 = weight(abstract_txt:queries in 3158) [ClassicSimilarity], result of:
           0.089500114 = score(doc=3158,freq=1.0), product of:
             0.28069675 = queryWeight, product of:
               3.33753 = boost
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.016485648 = queryNorm
             0.31884983 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.55958295 = weight(abstract_txt:space in 3158) [ClassicSimilarity], result of:
           0.55958295 = score(doc=3158,freq=7.0), product of:
             0.6274445 = queryWeight, product of:
               7.0568213 = boost
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.016485648 = queryNorm
             0.8918446 = fieldWeight in 3158, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
       0.52 = coord(13/25)
   

2. Bartell, B.T.; Cottrell, G.W.; Belew, R.K.: Representing documents using an explicit model of their similarities (1995) 0.33

   0.3334456 = sum of:
     0.3334456 = product of:
       1.1908772 = sum of:
         0.09778258 = weight(abstract_txt:modelling in 2426) [ClassicSimilarity], result of:
           0.09778258 = score(doc=2426,freq=1.0), product of:
             0.11816513 = queryWeight, product of:
               1.0827324 = boost
               6.6200633 = idf(docFreq=160, maxDocs=44421)
               0.016485648 = queryNorm
             0.8275079 = fieldWeight in 2426, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6200633 = idf(docFreq=160, maxDocs=44421)
               0.125 = fieldNorm(doc=2426)
         0.053374846 = weight(abstract_txt:document in 2426) [ClassicSimilarity], result of:
           0.053374846 = score(doc=2426,freq=1.0), product of:
             0.09943732 = queryWeight, product of:
               1.4046438 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016485648 = queryNorm
             0.53676873 = fieldWeight in 2426, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.125 = fieldNorm(doc=2426)
         0.1327574 = weight(abstract_txt:similarity in 2426) [ClassicSimilarity], result of:
           0.1327574 = score(doc=2426,freq=1.0), product of:
             0.18254256 = queryWeight, product of:
               1.9031523 = boost
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.016485648 = queryNorm
             0.72726816 = fieldWeight in 2426, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.125 = fieldNorm(doc=2426)
         0.32355285 = weight(abstract_txt:vector in 2426) [ClassicSimilarity], result of:
           0.32355285 = score(doc=2426,freq=3.0), product of:
             0.22921766 = queryWeight, product of:
               2.13263 = boost
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.016485648 = queryNorm
             1.4115529 = fieldWeight in 2426, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.125 = fieldNorm(doc=2426)
         0.026747553 = weight(abstract_txt:that in 2426) [ClassicSimilarity], result of:
           0.026747553 = score(doc=2426,freq=1.0), product of:
             0.09048046 = queryWeight, product of:
               2.3207562 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.016485648 = queryNorm
             0.2956169 = fieldWeight in 2426, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.125 = fieldNorm(doc=2426)
         0.13365702 = weight(abstract_txt:documents in 2426) [ClassicSimilarity], result of:
           0.13365702 = score(doc=2426,freq=2.0), product of:
             0.1833663 = queryWeight, product of:
               2.6975298 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.016485648 = queryNorm
             0.7289072 = fieldWeight in 2426, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.125 = fieldNorm(doc=2426)
         0.42300498 = weight(abstract_txt:space in 2426) [ClassicSimilarity], result of:
           0.42300498 = score(doc=2426,freq=1.0), product of:
             0.6274445 = queryWeight, product of:
               7.0568213 = boost
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.016485648 = queryNorm
             0.67417115 = fieldWeight in 2426, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.125 = fieldNorm(doc=2426)
       0.28 = coord(7/25)
   

3. Schlieder, T.; Meuss, H.: Querying and ranking XML documents (2002) 0.33

   0.33304235 = sum of:
     0.33304235 = product of:
       0.9251176 = sum of:
         0.009960824 = weight(abstract_txt:this in 1459) [ClassicSimilarity], result of:
           0.009960824 = score(doc=1459,freq=2.0), product of:
             0.046834107 = queryWeight, product of:
               1.180642 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.016485648 = queryNorm
             0.21268311 = fieldWeight in 1459, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.06537057 = weight(abstract_txt:document in 1459) [ClassicSimilarity], result of:
           0.06537057 = score(doc=1459,freq=6.0), product of:
             0.09943732 = queryWeight, product of:
               1.4046438 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016485648 = queryNorm
             0.6574048 = fieldWeight in 1459, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.07244649 = weight(abstract_txt:query in 1459) [ClassicSimilarity], result of:
           0.07244649 = score(doc=1459,freq=4.0), product of:
             0.121899866 = queryWeight, product of:
               1.5552245 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.016485648 = queryNorm
             0.5943115 = fieldWeight in 1459, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.0663787 = weight(abstract_txt:similarity in 1459) [ClassicSimilarity], result of:
           0.0663787 = score(doc=1459,freq=1.0), product of:
             0.18254256 = queryWeight, product of:
               1.9031523 = boost
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.016485648 = queryNorm
             0.36363408 = fieldWeight in 1459, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.13208991 = weight(abstract_txt:vector in 1459) [ClassicSimilarity], result of:
           0.13208991 = score(doc=1459,freq=2.0), product of:
             0.22921766 = queryWeight, product of:
               2.13263 = boost
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.016485648 = queryNorm
             0.5762641 = fieldWeight in 1459, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.018913377 = weight(abstract_txt:that in 1459) [ClassicSimilarity], result of:
           0.018913377 = score(doc=1459,freq=2.0), product of:
             0.09048046 = queryWeight, product of:
               2.3207562 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.016485648 = queryNorm
             0.20903271 = fieldWeight in 1459, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.08184788 = weight(abstract_txt:documents in 1459) [ClassicSimilarity], result of:
           0.08184788 = score(doc=1459,freq=3.0), product of:
             0.1833663 = queryWeight, product of:
               2.6975298 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.016485648 = queryNorm
             0.4463627 = fieldWeight in 1459, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.17900023 = weight(abstract_txt:queries in 1459) [ClassicSimilarity], result of:
           0.17900023 = score(doc=1459,freq=4.0), product of:
             0.28069675 = queryWeight, product of:
               3.33753 = boost
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.016485648 = queryNorm
             0.63769966 = fieldWeight in 1459, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
         0.29910967 = weight(abstract_txt:space in 1459) [ClassicSimilarity], result of:
           0.29910967 = score(doc=1459,freq=2.0), product of:
             0.6274445 = queryWeight, product of:
               7.0568213 = boost
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.016485648 = queryNorm
             0.47671098 = fieldWeight in 1459, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.0625 = fieldNorm(doc=1459)
       0.36 = coord(9/25)
   

4. Liu, G.Z.: Semantic vector space model : implementation and evaluation (1997) 0.31

   0.3086745 = sum of:
     0.3086745 = product of:
       0.96460783 = sum of:
         0.015249334 = weight(abstract_txt:this in 1161) [ClassicSimilarity], result of:
           0.015249334 = score(doc=1161,freq=3.0), product of:
             0.046834107 = queryWeight, product of:
               1.180642 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.016485648 = queryNorm
             0.3256032 = fieldWeight in 1161, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.078125 = fieldNorm(doc=1161)
         0.033359278 = weight(abstract_txt:document in 1161) [ClassicSimilarity], result of:
           0.033359278 = score(doc=1161,freq=1.0), product of:
             0.09943732 = queryWeight, product of:
               1.4046438 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016485648 = queryNorm
             0.33548045 = fieldWeight in 1161, 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=1161)
         0.082973376 = weight(abstract_txt:similarity in 1161) [ClassicSimilarity], result of:
           0.082973376 = score(doc=1161,freq=1.0), product of:
             0.18254256 = queryWeight, product of:
               1.9031523 = boost
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.016485648 = queryNorm
             0.4545426 = fieldWeight in 1161, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.078125 = fieldNorm(doc=1161)
         0.16511239 = weight(abstract_txt:vector in 1161) [ClassicSimilarity], result of:
           0.16511239 = score(doc=1161,freq=2.0), product of:
             0.22921766 = queryWeight, product of:
               2.13263 = boost
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.016485648 = queryNorm
             0.7203301 = fieldWeight in 1161, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.078125 = fieldNorm(doc=1161)
         0.01671722 = weight(abstract_txt:that in 1161) [ClassicSimilarity], result of:
           0.01671722 = score(doc=1161,freq=1.0), product of:
             0.09048046 = queryWeight, product of:
               2.3207562 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.016485648 = queryNorm
             0.18476056 = fieldWeight in 1161, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.078125 = fieldNorm(doc=1161)
         0.083535634 = weight(abstract_txt:documents in 1161) [ClassicSimilarity], result of:
           0.083535634 = score(doc=1161,freq=2.0), product of:
             0.1833663 = queryWeight, product of:
               2.6975298 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.016485648 = queryNorm
             0.455567 = fieldWeight in 1161, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.078125 = fieldNorm(doc=1161)
         0.19377343 = weight(abstract_txt:queries in 1161) [ClassicSimilarity], result of:
           0.19377343 = score(doc=1161,freq=3.0), product of:
             0.28069675 = queryWeight, product of:
               3.33753 = boost
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.016485648 = queryNorm
             0.69033015 = fieldWeight in 1161, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.078125 = fieldNorm(doc=1161)
         0.37388712 = weight(abstract_txt:space in 1161) [ClassicSimilarity], result of:
           0.37388712 = score(doc=1161,freq=2.0), product of:
             0.6274445 = queryWeight, product of:
               7.0568213 = boost
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.016485648 = queryNorm
             0.59588873 = fieldWeight in 1161, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.078125 = fieldNorm(doc=1161)
       0.32 = coord(8/25)
   

5. Bartell, B.T.; Cottrell, G.W.; Belew, R.K.: Optimizing similarity using multi-query relevance feedback (1998) 0.29

   0.2938563 = sum of:
     0.2938563 = product of:
       0.81626743 = sum of:
         0.05805256 = weight(abstract_txt:preference in 2152) [ClassicSimilarity], result of:
           0.05805256 = score(doc=2152,freq=1.0), product of:
             0.13250001 = queryWeight, product of:
               1.1465274 = boost
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.016485648 = queryNorm
             0.4381325 = fieldWeight in 2152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.0625 = fieldNorm(doc=2152)
         0.037741713 = weight(abstract_txt:document in 2152) [ClassicSimilarity], result of:
           0.037741713 = score(doc=2152,freq=2.0), product of:
             0.09943732 = queryWeight, product of:
               1.4046438 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016485648 = queryNorm
             0.3795528 = fieldWeight in 2152, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=2152)
         0.051227402 = weight(abstract_txt:query in 2152) [ClassicSimilarity], result of:
           0.051227402 = score(doc=2152,freq=2.0), product of:
             0.121899866 = queryWeight, product of:
               1.5552245 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.016485648 = queryNorm
             0.42024165 = fieldWeight in 2152, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.0625 = fieldNorm(doc=2152)
         0.1327574 = weight(abstract_txt:similarity in 2152) [ClassicSimilarity], result of:
           0.1327574 = score(doc=2152,freq=4.0), product of:
             0.18254256 = queryWeight, product of:
               1.9031523 = boost
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.016485648 = queryNorm
             0.72726816 = fieldWeight in 2152, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.0625 = fieldNorm(doc=2152)
         0.09340167 = weight(abstract_txt:vector in 2152) [ClassicSimilarity], result of:
           0.09340167 = score(doc=2152,freq=1.0), product of:
             0.22921766 = queryWeight, product of:
               2.13263 = boost
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.016485648 = queryNorm
             0.40748024 = fieldWeight in 2152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.519684 = idf(docFreq=177, maxDocs=44421)
               0.0625 = fieldNorm(doc=2152)
         0.023164058 = weight(abstract_txt:that in 2152) [ClassicSimilarity], result of:
           0.023164058 = score(doc=2152,freq=3.0), product of:
             0.09048046 = queryWeight, product of:
               2.3207562 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.016485648 = queryNorm
             0.25601172 = fieldWeight in 2152, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.0625 = fieldNorm(doc=2152)
         0.08184788 = weight(abstract_txt:documents in 2152) [ClassicSimilarity], result of:
           0.08184788 = score(doc=2152,freq=3.0), product of:
             0.1833663 = queryWeight, product of:
               2.6975298 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.016485648 = queryNorm
             0.4463627 = fieldWeight in 2152, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=2152)
         0.12657227 = weight(abstract_txt:queries in 2152) [ClassicSimilarity], result of:
           0.12657227 = score(doc=2152,freq=2.0), product of:
             0.28069675 = queryWeight, product of:
               3.33753 = boost
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.016485648 = queryNorm
             0.45092174 = fieldWeight in 2152, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.0625 = fieldNorm(doc=2152)
         0.21150249 = weight(abstract_txt:space in 2152) [ClassicSimilarity], result of:
           0.21150249 = score(doc=2152,freq=1.0), product of:
             0.6274445 = queryWeight, product of:
               7.0568213 = boost
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.016485648 = queryNorm
             0.33708557 = fieldWeight in 2152, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.393369 = idf(docFreq=548, maxDocs=44421)
               0.0625 = fieldNorm(doc=2152)
       0.36 = coord(9/25)