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

   5.106579 = sum of:
     5.106579 = weight(author_txt:chung in 4072) [ClassicSimilarity], result of:
       5.106579 = fieldWeight in 4072, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.1705265 = idf(docFreq=33, maxDocs=44218)
         0.625 = fieldNorm(doc=4072)
   

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

   5.106579 = sum of:
     5.106579 = weight(author_txt:chung in 5415) [ClassicSimilarity], result of:
       5.106579 = fieldWeight in 5415, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.1705265 = idf(docFreq=33, maxDocs=44218)
         0.625 = fieldNorm(doc=5415)
   

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

   4.0852633 = sum of:
     4.0852633 = weight(author_txt:chung in 2939) [ClassicSimilarity], result of:
       4.0852633 = fieldWeight in 2939, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.1705265 = idf(docFreq=33, maxDocs=44218)
         0.5 = fieldNorm(doc=2939)
   

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

   4.0852633 = sum of:
     4.0852633 = weight(author_txt:chung in 5066) [ClassicSimilarity], result of:
       4.0852633 = fieldWeight in 5066, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.1705265 = idf(docFreq=33, maxDocs=44218)
         0.5 = fieldNorm(doc=5066)
   

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

   4.0852633 = sum of:
     4.0852633 = weight(author_txt:chung in 5070) [ClassicSimilarity], result of:
       4.0852633 = fieldWeight in 5070, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.1705265 = idf(docFreq=33, maxDocs=44218)
         0.5 = fieldNorm(doc=5070)
   

Similar documents (content)

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

   0.51844555 = sum of:
     0.51844555 = product of:
       0.9072797 = sum of:
         0.1490741 = weight(abstract_txt:query in 2731) [ClassicSimilarity], result of:
           0.1490741 = score(doc=2731,freq=2.0), product of:
             0.23652567 = queryWeight, product of:
               1.29251 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.03849521 = queryNorm
             0.6302661 = fieldWeight in 2731, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.09375 = fieldNorm(doc=2731)
         0.11981468 = weight(abstract_txt:factors in 2731) [ClassicSimilarity], result of:
           0.11981468 = score(doc=2731,freq=1.0), product of:
             0.25760847 = queryWeight, product of:
               1.3488848 = boost
               4.9611073 = idf(docFreq=841, maxDocs=44218)
               0.03849521 = queryNorm
             0.4651038 = fieldWeight in 2731, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9611073 = idf(docFreq=841, maxDocs=44218)
               0.09375 = fieldNorm(doc=2731)
         0.31589174 = weight(abstract_txt:expansion in 2731) [ClassicSimilarity], result of:
           0.31589174 = score(doc=2731,freq=2.0), product of:
             0.39021352 = queryWeight, product of:
               1.6601447 = boost
               6.1059003 = idf(docFreq=267, maxDocs=44218)
               0.03849521 = queryNorm
             0.8095356 = fieldWeight in 2731, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.1059003 = idf(docFreq=267, maxDocs=44218)
               0.09375 = fieldNorm(doc=2731)
         0.32249916 = weight(abstract_txt:affecting in 2731) [ClassicSimilarity], result of:
           0.32249916 = score(doc=2731,freq=1.0), product of:
             0.49847016 = queryWeight, product of:
               1.8763522 = boost
               6.901097 = idf(docFreq=120, maxDocs=44218)
               0.03849521 = queryNorm
             0.64697784 = fieldWeight in 2731, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.901097 = idf(docFreq=120, maxDocs=44218)
               0.09375 = fieldNorm(doc=2731)
       0.5714286 = coord(4/7)
   

2. Turtle, H.; Flood, J.: Query evaluation : strategies and optimizations (1995) 0.52

   0.5159945 = sum of:
     0.5159945 = product of:
       1.2039871 = sum of:
         0.18369155 = weight(abstract_txt:performance in 4087) [ClassicSimilarity], result of:
           0.18369155 = score(doc=4087,freq=2.0), product of:
             0.2244108 = queryWeight, product of:
               1.2589737 = boost
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.03849521 = queryNorm
             0.81855035 = fieldWeight in 4087, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.125 = fieldNorm(doc=4087)
         0.14054842 = weight(abstract_txt:query in 4087) [ClassicSimilarity], result of:
           0.14054842 = score(doc=4087,freq=1.0), product of:
             0.23652567 = queryWeight, product of:
               1.29251 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.03849521 = queryNorm
             0.5942206 = fieldWeight in 4087, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.125 = fieldNorm(doc=4087)
         0.87974715 = weight(abstract_txt:optimization in 4087) [ClassicSimilarity], result of:
           0.87974715 = score(doc=4087,freq=2.0), product of:
             0.6376116 = queryWeight, product of:
               2.1221344 = boost
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.03849521 = queryNorm
             1.379754 = fieldWeight in 4087, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.125 = fieldNorm(doc=4087)
       0.42857143 = coord(3/7)
   

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

   0.5158638 = sum of:
     0.5158638 = product of:
       1.2036822 = sum of:
         0.12988953 = weight(abstract_txt:performance in 4847) [ClassicSimilarity], result of:
           0.12988953 = score(doc=4847,freq=1.0), product of:
             0.2244108 = queryWeight, product of:
               1.2589737 = boost
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.03849521 = queryNorm
             0.5788025 = fieldWeight in 4847, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.125 = fieldNorm(doc=4847)
         0.34427193 = weight(abstract_txt:query in 4847) [ClassicSimilarity], result of:
           0.34427193 = score(doc=4847,freq=6.0), product of:
             0.23652567 = queryWeight, product of:
               1.29251 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.03849521 = queryNorm
             1.4555373 = fieldWeight in 4847, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.125 = fieldNorm(doc=4847)
         0.7295208 = weight(abstract_txt:expansion in 4847) [ClassicSimilarity], result of:
           0.7295208 = score(doc=4847,freq=6.0), product of:
             0.39021352 = queryWeight, product of:
               1.6601447 = boost
               6.1059003 = idf(docFreq=267, maxDocs=44218)
               0.03849521 = queryNorm
             1.8695426 = fieldWeight in 4847, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.1059003 = idf(docFreq=267, maxDocs=44218)
               0.125 = fieldNorm(doc=4847)
       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

   0.44954085 = sum of:
     0.44954085 = product of:
       0.78669643 = sum of:
         0.09741715 = weight(abstract_txt:performance in 1666) [ClassicSimilarity], result of:
           0.09741715 = score(doc=1666,freq=1.0), product of:
             0.2244108 = queryWeight, product of:
               1.2589737 = boost
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.03849521 = queryNorm
             0.43410188 = fieldWeight in 1666, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.09375 = fieldNorm(doc=1666)
         0.18257776 = weight(abstract_txt:query in 1666) [ClassicSimilarity], result of:
           0.18257776 = score(doc=1666,freq=3.0), product of:
             0.23652567 = queryWeight, product of:
               1.29251 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.03849521 = queryNorm
             0.7719152 = fieldWeight in 1666, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.09375 = fieldNorm(doc=1666)
         0.11981468 = weight(abstract_txt:factors in 1666) [ClassicSimilarity], result of:
           0.11981468 = score(doc=1666,freq=1.0), product of:
             0.25760847 = queryWeight, product of:
               1.3488848 = boost
               4.9611073 = idf(docFreq=841, maxDocs=44218)
               0.03849521 = queryNorm
             0.4651038 = fieldWeight in 1666, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9611073 = idf(docFreq=841, maxDocs=44218)
               0.09375 = fieldNorm(doc=1666)
         0.3868868 = weight(abstract_txt:expansion in 1666) [ClassicSimilarity], result of:
           0.3868868 = score(doc=1666,freq=3.0), product of:
             0.39021352 = queryWeight, product of:
               1.6601447 = boost
               6.1059003 = idf(docFreq=267, maxDocs=44218)
               0.03849521 = queryNorm
             0.9914746 = fieldWeight in 1666, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.1059003 = idf(docFreq=267, maxDocs=44218)
               0.09375 = fieldNorm(doc=1666)
       0.5714286 = coord(4/7)
   

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

   0.3964968 = sum of:
     0.3964968 = product of:
       0.9251592 = sum of:
         0.25820395 = weight(abstract_txt:query in 919) [ClassicSimilarity], result of:
           0.25820395 = score(doc=919,freq=6.0), product of:
             0.23652567 = queryWeight, product of:
               1.29251 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.03849521 = queryNorm
             1.091653 = fieldWeight in 919, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.09375 = fieldNorm(doc=919)
         0.11981468 = weight(abstract_txt:factors in 919) [ClassicSimilarity], result of:
           0.11981468 = score(doc=919,freq=1.0), product of:
             0.25760847 = queryWeight, product of:
               1.3488848 = boost
               4.9611073 = idf(docFreq=841, maxDocs=44218)
               0.03849521 = queryNorm
             0.4651038 = fieldWeight in 919, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9611073 = idf(docFreq=841, maxDocs=44218)
               0.09375 = fieldNorm(doc=919)
         0.5471406 = weight(abstract_txt:expansion in 919) [ClassicSimilarity], result of:
           0.5471406 = score(doc=919,freq=6.0), product of:
             0.39021352 = queryWeight, product of:
               1.6601447 = boost
               6.1059003 = idf(docFreq=267, maxDocs=44218)
               0.03849521 = queryNorm
             1.402157 = fieldWeight in 919, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.1059003 = idf(docFreq=267, maxDocs=44218)
               0.09375 = fieldNorm(doc=919)
       0.42857143 = coord(3/7)