Document (#27538)

Author

Chung, Y.M.
Lee, J.Y.

Title

Optimization of some factors affecting the performance of query expansion

Source

Information processing and management. 40(2004) no.6, S.891-

Year

2004

Theme

Retrievalalgorithmen

Similar documents (author)

1. Chung, T.M.: ¬A corpus comparison approach for terminology extraction (2003) 5.11

   5.1094418 = sum of:
     5.1094418 = weight(author_txt:chung in 5072) [ClassicSimilarity], result of:
       5.1094418 = fieldWeight in 5072, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.175107 = idf(docFreq=33, maxDocs=44421)
         0.625 = fieldNorm(doc=5072)
   

2. Chung, H.H.: User friendly audiovisual material cataloging at Westchester County Public Library System (2001) 5.11

   5.1094418 = sum of:
     5.1094418 = weight(author_txt:chung in 415) [ClassicSimilarity], result of:
       5.1094418 = fieldWeight in 415, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.175107 = idf(docFreq=33, maxDocs=44421)
         0.625 = fieldNorm(doc=415)
   

3. Chung, Y.-K.: Characteristics of references in international classification systems literature (1995) 4.09

   4.0875535 = sum of:
     4.0875535 = weight(author_txt:chung in 3007) [ClassicSimilarity], result of:
       4.0875535 = fieldWeight in 3007, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.175107 = idf(docFreq=33, maxDocs=44421)
         0.5 = fieldNorm(doc=3007)
   

4. Chung, Y.-K.: Bradford distribution and core authors in classification systems literature (1994) 4.09

   4.0875535 = sum of:
     4.0875535 = weight(author_txt:chung in 5134) [ClassicSimilarity], result of:
       4.0875535 = fieldWeight in 5134, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.175107 = idf(docFreq=33, maxDocs=44421)
         0.5 = fieldNorm(doc=5134)
   

5. Chung, Y.-K.: Core international journals of classification systems : an application of Bradford's law (1994) 4.09

   4.0875535 = sum of:
     4.0875535 = weight(author_txt:chung in 5138) [ClassicSimilarity], result of:
       4.0875535 = fieldWeight in 5138, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.175107 = idf(docFreq=33, maxDocs=44421)
         0.5 = fieldNorm(doc=5138)
   

Similar documents (content)

1. Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992) 0.52

   0.51948667 = sum of:
     0.51948667 = product of:
       0.90910167 = sum of:
         0.14938918 = weight(abstract_txt:query in 3731) [ClassicSimilarity], result of:
           0.14938918 = score(doc=3731,freq=2.0), product of:
             0.2369893 = queryWeight, product of:
               1.2924834 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.03856556 = queryNorm
             0.6303625 = fieldWeight in 3731, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.09375 = fieldNorm(doc=3731)
         0.11948918 = weight(abstract_txt:factors in 3731) [ClassicSimilarity], result of:
           0.11948918 = score(doc=3731,freq=1.0), product of:
             0.25728336 = queryWeight, product of:
               1.3466864 = boost
               4.9538813 = idf(docFreq=851, maxDocs=44421)
               0.03856556 = queryNorm
             0.46442637 = fieldWeight in 3731, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9538813 = idf(docFreq=851, maxDocs=44421)
               0.09375 = fieldNorm(doc=3731)
         0.31654724 = weight(abstract_txt:expansion in 3731) [ClassicSimilarity], result of:
           0.31654724 = score(doc=3731,freq=2.0), product of:
             0.39096844 = queryWeight, product of:
               1.6600894 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.03856556 = queryNorm
             0.8096491 = fieldWeight in 3731, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.09375 = fieldNorm(doc=3731)
         0.32367605 = weight(abstract_txt:affecting in 3731) [ClassicSimilarity], result of:
           0.32367605 = score(doc=3731,freq=1.0), product of:
             0.49995744 = queryWeight, product of:
               1.8772718 = boost
               6.905677 = idf(docFreq=120, maxDocs=44421)
               0.03856556 = queryNorm
             0.6474072 = fieldWeight in 3731, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.905677 = idf(docFreq=120, maxDocs=44421)
               0.09375 = fieldNorm(doc=3731)
       0.5714286 = coord(4/7)
   

2. Efthimiadis, E.N.: Query expansion (1996) 0.52

   0.51653224 = sum of:
     0.51653224 = product of:
       1.2052419 = sum of:
         0.12920775 = weight(abstract_txt:performance in 4915) [ClassicSimilarity], result of:
           0.12920775 = score(doc=4915,freq=1.0), product of:
             0.22374803 = queryWeight, product of:
               1.2558571 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.03856556 = queryNorm
             0.5774699 = fieldWeight in 4915, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.125 = fieldNorm(doc=4915)
         0.34499952 = weight(abstract_txt:query in 4915) [ClassicSimilarity], result of:
           0.34499952 = score(doc=4915,freq=6.0), product of:
             0.2369893 = queryWeight, product of:
               1.2924834 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.03856556 = queryNorm
             1.4557599 = fieldWeight in 4915, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.125 = fieldNorm(doc=4915)
         0.7310346 = weight(abstract_txt:expansion in 4915) [ClassicSimilarity], result of:
           0.7310346 = score(doc=4915,freq=6.0), product of:
             0.39096844 = queryWeight, product of:
               1.6600894 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.03856556 = queryNorm
             1.8698046 = fieldWeight in 4915, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.125 = fieldNorm(doc=4915)
       0.42857143 = coord(3/7)
   

3. Turtle, H.; Flood, J.: Query evaluation : strategies and optimizations (1995) 0.51

   0.51406884 = sum of:
     0.51406884 = product of:
       1.199494 = sum of:
         0.18272734 = weight(abstract_txt:performance in 4155) [ClassicSimilarity], result of:
           0.18272734 = score(doc=4155,freq=2.0), product of:
             0.22374803 = queryWeight, product of:
               1.2558571 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.03856556 = queryNorm
             0.8166657 = fieldWeight in 4155, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.125 = fieldNorm(doc=4155)
         0.14084546 = weight(abstract_txt:query in 4155) [ClassicSimilarity], result of:
           0.14084546 = score(doc=4155,freq=1.0), product of:
             0.2369893 = queryWeight, product of:
               1.2924834 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.03856556 = queryNorm
             0.5943115 = fieldWeight in 4155, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.125 = fieldNorm(doc=4155)
         0.8759212 = weight(abstract_txt:optimization in 4155) [ClassicSimilarity], result of:
           0.8759212 = score(doc=4155,freq=2.0), product of:
             0.6361119 = queryWeight, product of:
               2.1175194 = boost
               7.7894444 = idf(docFreq=49, maxDocs=44421)
               0.03856556 = queryNorm
             1.3769922 = fieldWeight in 4155, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.7894444 = idf(docFreq=49, maxDocs=44421)
               0.125 = fieldNorm(doc=4155)
       0.42857143 = coord(3/7)
   

4. Hancock-Beaulieu, M.; Fieldhouse, M.; Do, T.: ¬An evaluation of interactive query expansion in an online library catalogue with a graphical user interface (1995) 0.45

   0.44974187 = sum of:
     0.44974187 = product of:
       0.7870482 = sum of:
         0.09690581 = weight(abstract_txt:performance in 1734) [ClassicSimilarity], result of:
           0.09690581 = score(doc=1734,freq=1.0), product of:
             0.22374803 = queryWeight, product of:
               1.2558571 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.03856556 = queryNorm
             0.43310243 = fieldWeight in 1734, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.09375 = fieldNorm(doc=1734)
         0.18296362 = weight(abstract_txt:query in 1734) [ClassicSimilarity], result of:
           0.18296362 = score(doc=1734,freq=3.0), product of:
             0.2369893 = queryWeight, product of:
               1.2924834 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.03856556 = queryNorm
             0.7720333 = fieldWeight in 1734, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.09375 = fieldNorm(doc=1734)
         0.11948918 = weight(abstract_txt:factors in 1734) [ClassicSimilarity], result of:
           0.11948918 = score(doc=1734,freq=1.0), product of:
             0.25728336 = queryWeight, product of:
               1.3466864 = boost
               4.9538813 = idf(docFreq=851, maxDocs=44421)
               0.03856556 = queryNorm
             0.46442637 = fieldWeight in 1734, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9538813 = idf(docFreq=851, maxDocs=44421)
               0.09375 = fieldNorm(doc=1734)
         0.38768962 = weight(abstract_txt:expansion in 1734) [ClassicSimilarity], result of:
           0.38768962 = score(doc=1734,freq=3.0), product of:
             0.39096844 = queryWeight, product of:
               1.6600894 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.03856556 = queryNorm
             0.99161357 = fieldWeight in 1734, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.09375 = fieldNorm(doc=1734)
       0.5714286 = coord(4/7)
   

5. Bhogal, J.; Macfarlane, A.; Smith, P.: ¬A review of ontology based query expansion (2007) 0.40

   0.39707774 = sum of:
     0.39707774 = product of:
       0.92651474 = sum of:
         0.25874963 = weight(abstract_txt:query in 1919) [ClassicSimilarity], result of:
           0.25874963 = score(doc=1919,freq=6.0), product of:
             0.2369893 = queryWeight, product of:
               1.2924834 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.03856556 = queryNorm
             1.0918199 = fieldWeight in 1919, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.09375 = fieldNorm(doc=1919)
         0.11948918 = weight(abstract_txt:factors in 1919) [ClassicSimilarity], result of:
           0.11948918 = score(doc=1919,freq=1.0), product of:
             0.25728336 = queryWeight, product of:
               1.3466864 = boost
               4.9538813 = idf(docFreq=851, maxDocs=44421)
               0.03856556 = queryNorm
             0.46442637 = fieldWeight in 1919, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9538813 = idf(docFreq=851, maxDocs=44421)
               0.09375 = fieldNorm(doc=1919)
         0.54827595 = weight(abstract_txt:expansion in 1919) [ClassicSimilarity], result of:
           0.54827595 = score(doc=1919,freq=6.0), product of:
             0.39096844 = queryWeight, product of:
               1.6600894 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.03856556 = queryNorm
             1.4023535 = fieldWeight in 1919, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.09375 = fieldNorm(doc=1919)
       0.42857143 = coord(3/7)