Document (#37106)

Author
Chen, L.-C.
Title
Next generation search engine for the result clustering technology
Source
Next generation search engines: advanced models for information retrieval. Eds.: C. Jouis, u.a
Imprint
Hershey, PA : IGI Publishing
Year
2012
Pages
S.274-290
Abstract
Result clustering has recently attracted a lot of attention to provide the users with a succinct overview of relevant search results than traditional search engines. This chapter proposes a mixed clustering method to organize all returned search results into a hierarchical tree structure. The clustering method accomplishes two main tasks, one is label construction and the other is tree building. This chapter uses precision to measure the quality of clustering results. According to the results of experiments, the author preliminarily concluded that the performance of the system is better than many other well-known commercial and academic systems. This chapter makes several contributions. First, it presents a high performance system based on the clustering method. Second, it develops a divisive hierarchical clustering algorithm to organize all returned snippets into hierarchical tree structure. Third, it performs a wide range of experimental analyses to show that almost all commercial systems are significantly better than most current academic systems.
Footnote
Vgl.: http://www.igi-global.com/book/next-generation-search-engines/64429.
Theme
Suchmaschinen

Similar documents (author)

  1. Chen, Y.N.; Chen, S.J.: ¬A metadata practice of the OFLA FRBR model : a case study for the National Palace Museum in Taipai (2004) 4.35
    4.3499155 = sum of:
      4.3499155 = weight(author_txt:chen in 3384) [ClassicSimilarity], result of:
        4.3499155 = fieldWeight in 3384, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          6.1517096 = idf(docFreq=255, maxDocs=44218)
          0.5 = fieldNorm(doc=3384)
    
  2. Chen, C.C.; Chen, H.H.; Chen, K.H.: ¬The design of the XML/Metadata management system (2000) 4.00
    3.9956524 = sum of:
      3.9956524 = weight(author_txt:chen in 4633) [ClassicSimilarity], result of:
        3.9956524 = fieldWeight in 4633, product of:
          1.7320508 = tf(freq=3.0), with freq of:
            3.0 = termFreq=3.0
          6.1517096 = idf(docFreq=255, maxDocs=44218)
          0.375 = fieldNorm(doc=4633)
    
  3. Chen, W.Y.: Observations on cataloguing and classification (1991) 3.84
    3.8448186 = sum of:
      3.8448186 = weight(author_txt:chen in 4184) [ClassicSimilarity], result of:
        3.8448186 = fieldWeight in 4184, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.1517096 = idf(docFreq=255, maxDocs=44218)
          0.625 = fieldNorm(doc=4184)
    
  4. Chen, H.: Knowledge-based document retrieval : framework and design (1992) 3.84
    3.8448186 = sum of:
      3.8448186 = weight(author_txt:chen in 5283) [ClassicSimilarity], result of:
        3.8448186 = fieldWeight in 5283, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.1517096 = idf(docFreq=255, maxDocs=44218)
          0.625 = fieldNorm(doc=5283)
    
  5. Chen, P.S.: On inference rules of logic-based information retrieval systems (1994) 3.84
    3.8448186 = sum of:
      3.8448186 = weight(author_txt:chen in 6731) [ClassicSimilarity], result of:
        3.8448186 = fieldWeight in 6731, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.1517096 = idf(docFreq=255, maxDocs=44218)
          0.625 = fieldNorm(doc=6731)
    

Similar documents (content)

  1. Cao, Y.; Duan, H.; Lin, C.-L.; Yu, Y.: Re-ranking question search results by clustering questions (2011) 0.44
    0.436699 = sum of:
      0.436699 = product of:
        1.0917475 = sum of:
          0.009090979 = weight(abstract_txt:this in 4469) [ClassicSimilarity], result of:
            0.009090979 = score(doc=4469,freq=1.0), product of:
              0.04018638 = queryWeight, product of:
                1.0281298 = boost
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.016198337 = queryNorm
              0.2262204 = fieldWeight in 4469, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.09375 = fieldNorm(doc=4469)
          0.021901522 = weight(abstract_txt:into in 4469) [ClassicSimilarity], result of:
            0.021901522 = score(doc=4469,freq=1.0), product of:
              0.063089564 = queryWeight, product of:
                1.0518205 = boost
                3.7029297 = idf(docFreq=2962, maxDocs=44218)
                0.016198337 = queryNorm
              0.34714967 = fieldWeight in 4469, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7029297 = idf(docFreq=2962, maxDocs=44218)
                0.09375 = fieldNorm(doc=4469)
          0.061838653 = weight(abstract_txt:structure in 4469) [ClassicSimilarity], result of:
            0.061838653 = score(doc=4469,freq=3.0), product of:
              0.08738582 = queryWeight, product of:
                1.2378937 = boost
                4.3579993 = idf(docFreq=1538, maxDocs=44218)
                0.016198337 = queryNorm
              0.7076509 = fieldWeight in 4469, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.3579993 = idf(docFreq=1538, maxDocs=44218)
                0.09375 = fieldNorm(doc=4469)
          0.04282517 = weight(abstract_txt:performance in 4469) [ClassicSimilarity], result of:
            0.04282517 = score(doc=4469,freq=1.0), product of:
              0.09865235 = queryWeight, product of:
                1.3152751 = boost
                4.63042 = idf(docFreq=1171, maxDocs=44218)
                0.016198337 = queryNorm
              0.43410188 = fieldWeight in 4469, 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=4469)
          0.046595085 = weight(abstract_txt:better in 4469) [ClassicSimilarity], result of:
            0.046595085 = score(doc=4469,freq=1.0), product of:
              0.10436016 = queryWeight, product of:
                1.3527895 = boost
                4.76249 = idf(docFreq=1026, maxDocs=44218)
                0.016198337 = queryNorm
              0.44648343 = fieldWeight in 4469, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.76249 = idf(docFreq=1026, maxDocs=44218)
                0.09375 = fieldNorm(doc=4469)
          0.038236715 = weight(abstract_txt:than in 4469) [ClassicSimilarity], result of:
            0.038236715 = score(doc=4469,freq=1.0), product of:
              0.10471096 = queryWeight, product of:
                1.6596044 = boost
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.016198337 = queryNorm
              0.3651644 = fieldWeight in 4469, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.09375 = fieldNorm(doc=4469)
          0.10687598 = weight(abstract_txt:organize in 4469) [ClassicSimilarity], result of:
            0.10687598 = score(doc=4469,freq=1.0), product of:
              0.18150757 = queryWeight, product of:
                1.7840632 = boost
                6.280787 = idf(docFreq=224, maxDocs=44218)
                0.016198337 = queryNorm
              0.5888238 = fieldWeight in 4469, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.280787 = idf(docFreq=224, maxDocs=44218)
                0.09375 = fieldNorm(doc=4469)
          0.063106306 = weight(abstract_txt:results in 4469) [ClassicSimilarity], result of:
            0.063106306 = score(doc=4469,freq=3.0), product of:
              0.111598775 = queryWeight, product of:
                1.9783703 = boost
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.016198337 = queryNorm
              0.56547487 = fieldWeight in 4469, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.09375 = fieldNorm(doc=4469)
          0.07314393 = weight(abstract_txt:search in 4469) [ClassicSimilarity], result of:
            0.07314393 = score(doc=4469,freq=3.0), product of:
              0.12313924 = queryWeight, product of:
                2.0781462 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.016198337 = queryNorm
              0.59399366 = fieldWeight in 4469, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.09375 = fieldNorm(doc=4469)
          0.6281331 = weight(abstract_txt:clustering in 4469) [ClassicSimilarity], result of:
            0.6281331 = score(doc=4469,freq=3.0), product of:
              0.622288 = queryWeight, product of:
                6.180059 = boost
                6.2162485 = idf(docFreq=239, maxDocs=44218)
                0.016198337 = queryNorm
              1.009393 = fieldWeight in 4469, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.2162485 = idf(docFreq=239, maxDocs=44218)
                0.09375 = fieldNorm(doc=4469)
        0.4 = coord(10/25)
    
  2. Koshman, S.; Spink, A.; Jansen, B.J.: Web searching on the Vivisimo search engine (2006) 0.37
    0.36897606 = sum of:
      0.36897606 = product of:
        0.8385819 = sum of:
          0.012547525 = weight(abstract_txt:other in 216) [ClassicSimilarity], result of:
            0.012547525 = score(doc=216,freq=1.0), product of:
              0.057026174 = queryWeight, product of:
                3.5204957 = idf(docFreq=3555, maxDocs=44218)
                0.016198337 = queryNorm
              0.22003098 = fieldWeight in 216, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5204957 = idf(docFreq=3555, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.0060606524 = weight(abstract_txt:this in 216) [ClassicSimilarity], result of:
            0.0060606524 = score(doc=216,freq=1.0), product of:
              0.04018638 = queryWeight, product of:
                1.0281298 = boost
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.016198337 = queryNorm
              0.1508136 = fieldWeight in 216, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.020648953 = weight(abstract_txt:into in 216) [ClassicSimilarity], result of:
            0.020648953 = score(doc=216,freq=2.0), product of:
              0.063089564 = queryWeight, product of:
                1.0518205 = boost
                3.7029297 = idf(docFreq=2962, maxDocs=44218)
                0.016198337 = queryNorm
              0.32729584 = fieldWeight in 216, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.7029297 = idf(docFreq=2962, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.023801709 = weight(abstract_txt:structure in 216) [ClassicSimilarity], result of:
            0.023801709 = score(doc=216,freq=1.0), product of:
              0.08738582 = queryWeight, product of:
                1.2378937 = boost
                4.3579993 = idf(docFreq=1538, maxDocs=44218)
                0.016198337 = queryNorm
              0.27237496 = fieldWeight in 216, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.3579993 = idf(docFreq=1538, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.038202252 = weight(abstract_txt:result in 216) [ClassicSimilarity], result of:
            0.038202252 = score(doc=216,freq=1.0), product of:
              0.1197921 = queryWeight, product of:
                1.4493623 = boost
                5.1024737 = idf(docFreq=730, maxDocs=44218)
                0.016198337 = queryNorm
              0.3189046 = fieldWeight in 216, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.1024737 = idf(docFreq=730, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.01713241 = weight(abstract_txt:systems in 216) [ClassicSimilarity], result of:
            0.01713241 = score(doc=216,freq=1.0), product of:
              0.08034243 = queryWeight, product of:
                1.4537207 = boost
                3.4118783 = idf(docFreq=3963, maxDocs=44218)
                0.016198337 = queryNorm
              0.2132424 = fieldWeight in 216, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4118783 = idf(docFreq=3963, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.025491143 = weight(abstract_txt:than in 216) [ClassicSimilarity], result of:
            0.025491143 = score(doc=216,freq=1.0), product of:
              0.10471096 = queryWeight, product of:
                1.6596044 = boost
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.016198337 = queryNorm
              0.24344292 = fieldWeight in 216, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.048579257 = weight(abstract_txt:results in 216) [ClassicSimilarity], result of:
            0.048579257 = score(doc=216,freq=4.0), product of:
              0.111598775 = queryWeight, product of:
                1.9783703 = boost
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.016198337 = queryNorm
              0.43530276 = fieldWeight in 216, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.089027956 = weight(abstract_txt:search in 216) [ClassicSimilarity], result of:
            0.089027956 = score(doc=216,freq=10.0), product of:
              0.12313924 = queryWeight, product of:
                2.0781462 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.016198337 = queryNorm
              0.7229861 = fieldWeight in 216, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.13833466 = weight(abstract_txt:tree in 216) [ClassicSimilarity], result of:
            0.13833466 = score(doc=216,freq=1.0), product of:
              0.32336023 = queryWeight, product of:
                2.9164317 = boost
                6.8448567 = idf(docFreq=127, maxDocs=44218)
                0.016198337 = queryNorm
              0.42780355 = fieldWeight in 216, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8448567 = idf(docFreq=127, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
          0.4187554 = weight(abstract_txt:clustering in 216) [ClassicSimilarity], result of:
            0.4187554 = score(doc=216,freq=3.0), product of:
              0.622288 = queryWeight, product of:
                6.180059 = boost
                6.2162485 = idf(docFreq=239, maxDocs=44218)
                0.016198337 = queryNorm
              0.67292863 = fieldWeight in 216, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.2162485 = idf(docFreq=239, maxDocs=44218)
                0.0625 = fieldNorm(doc=216)
        0.44 = coord(11/25)
    
  3. Chang, Y.F.; Chen, C.-M.: Classification and visualization of the social science network by the minimum span clustering method (2011) 0.33
    0.32572672 = sum of:
      0.32572672 = product of:
        0.9047964 = sum of:
          0.008571057 = weight(abstract_txt:this in 4940) [ClassicSimilarity], result of:
            0.008571057 = score(doc=4940,freq=2.0), product of:
              0.04018638 = queryWeight, product of:
                1.0281298 = boost
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.016198337 = queryNorm
              0.21328263 = fieldWeight in 4940, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.0625 = fieldNorm(doc=4940)
          0.0336607 = weight(abstract_txt:structure in 4940) [ClassicSimilarity], result of:
            0.0336607 = score(doc=4940,freq=2.0), product of:
              0.08738582 = queryWeight, product of:
                1.2378937 = boost
                4.3579993 = idf(docFreq=1538, maxDocs=44218)
                0.016198337 = queryNorm
              0.38519636 = fieldWeight in 4940, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.3579993 = idf(docFreq=1538, maxDocs=44218)
                0.0625 = fieldNorm(doc=4940)
          0.031063389 = weight(abstract_txt:better in 4940) [ClassicSimilarity], result of:
            0.031063389 = score(doc=4940,freq=1.0), product of:
              0.10436016 = queryWeight, product of:
                1.3527895 = boost
                4.76249 = idf(docFreq=1026, maxDocs=44218)
                0.016198337 = queryNorm
              0.2976556 = fieldWeight in 4940, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.76249 = idf(docFreq=1026, maxDocs=44218)
                0.0625 = fieldNorm(doc=4940)
          0.025491143 = weight(abstract_txt:than in 4940) [ClassicSimilarity], result of:
            0.025491143 = score(doc=4940,freq=1.0), product of:
              0.10471096 = queryWeight, product of:
                1.6596044 = boost
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.016198337 = queryNorm
              0.24344292 = fieldWeight in 4940, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.0625 = fieldNorm(doc=4940)
          0.078664795 = weight(abstract_txt:method in 4940) [ClassicSimilarity], result of:
            0.078664795 = score(doc=4940,freq=4.0), product of:
              0.13981901 = queryWeight, product of:
                1.9177483 = boost
                4.50095 = idf(docFreq=1333, maxDocs=44218)
                0.016198337 = queryNorm
              0.56261873 = fieldWeight in 4940, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.50095 = idf(docFreq=1333, maxDocs=44218)
                0.0625 = fieldNorm(doc=4940)
          0.024289628 = weight(abstract_txt:results in 4940) [ClassicSimilarity], result of:
            0.024289628 = score(doc=4940,freq=1.0), product of:
              0.111598775 = queryWeight, product of:
                1.9783703 = boost
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.016198337 = queryNorm
              0.21765138 = fieldWeight in 4940, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.0625 = fieldNorm(doc=4940)
          0.08118395 = weight(abstract_txt:hierarchical in 4940) [ClassicSimilarity], result of:
            0.08118395 = score(doc=4940,freq=1.0), product of:
              0.22666235 = queryWeight, product of:
                2.4417334 = boost
                5.7307405 = idf(docFreq=389, maxDocs=44218)
                0.016198337 = queryNorm
              0.35817128 = fieldWeight in 4940, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.7307405 = idf(docFreq=389, maxDocs=44218)
                0.0625 = fieldNorm(doc=4940)
          0.13833466 = weight(abstract_txt:tree in 4940) [ClassicSimilarity], result of:
            0.13833466 = score(doc=4940,freq=1.0), product of:
              0.32336023 = queryWeight, product of:
                2.9164317 = boost
                6.8448567 = idf(docFreq=127, maxDocs=44218)
                0.016198337 = queryNorm
              0.42780355 = fieldWeight in 4940, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8448567 = idf(docFreq=127, maxDocs=44218)
                0.0625 = fieldNorm(doc=4940)
          0.4835371 = weight(abstract_txt:clustering in 4940) [ClassicSimilarity], result of:
            0.4835371 = score(doc=4940,freq=4.0), product of:
              0.622288 = queryWeight, product of:
                6.180059 = boost
                6.2162485 = idf(docFreq=239, maxDocs=44218)
                0.016198337 = queryNorm
              0.77703106 = fieldWeight in 4940, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.2162485 = idf(docFreq=239, maxDocs=44218)
                0.0625 = fieldNorm(doc=4940)
        0.36 = coord(9/25)
    
  4. Yoon, Y.; Lee, C.; Lee, G.G.: ¬An effective procedure for constructing a hierarchical text classification system (2006) 0.24
    0.23566055 = sum of:
      0.23566055 = product of:
        0.6546126 = sum of:
          0.066695005 = weight(abstract_txt:performs in 5273) [ClassicSimilarity], result of:
            0.066695005 = score(doc=5273,freq=1.0), product of:
              0.11879944 = queryWeight, product of:
                1.0205989 = boost
                7.1860275 = idf(docFreq=90, maxDocs=44218)
                0.016198337 = queryNorm
              0.5614084 = fieldWeight in 5273, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1860275 = idf(docFreq=90, maxDocs=44218)
                0.078125 = fieldNorm(doc=5273)
          0.007575815 = weight(abstract_txt:this in 5273) [ClassicSimilarity], result of:
            0.007575815 = score(doc=5273,freq=1.0), product of:
              0.04018638 = queryWeight, product of:
                1.0281298 = boost
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.016198337 = queryNorm
              0.18851699 = fieldWeight in 5273, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.078125 = fieldNorm(doc=5273)
          0.018251268 = weight(abstract_txt:into in 5273) [ClassicSimilarity], result of:
            0.018251268 = score(doc=5273,freq=1.0), product of:
              0.063089564 = queryWeight, product of:
                1.0518205 = boost
                3.7029297 = idf(docFreq=2962, maxDocs=44218)
                0.016198337 = queryNorm
              0.28929138 = fieldWeight in 5273, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7029297 = idf(docFreq=2962, maxDocs=44218)
                0.078125 = fieldNorm(doc=5273)
          0.038829233 = weight(abstract_txt:better in 5273) [ClassicSimilarity], result of:
            0.038829233 = score(doc=5273,freq=1.0), product of:
              0.10436016 = queryWeight, product of:
                1.3527895 = boost
                4.76249 = idf(docFreq=1026, maxDocs=44218)
                0.016198337 = queryNorm
              0.3720695 = fieldWeight in 5273, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.76249 = idf(docFreq=1026, maxDocs=44218)
                0.078125 = fieldNorm(doc=5273)
          0.031863928 = weight(abstract_txt:than in 5273) [ClassicSimilarity], result of:
            0.031863928 = score(doc=5273,freq=1.0), product of:
              0.10471096 = queryWeight, product of:
                1.6596044 = boost
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.016198337 = queryNorm
              0.30430365 = fieldWeight in 5273, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8950868 = idf(docFreq=2444, maxDocs=44218)
                0.078125 = fieldNorm(doc=5273)
          0.08515714 = weight(abstract_txt:method in 5273) [ClassicSimilarity], result of:
            0.08515714 = score(doc=5273,freq=3.0), product of:
              0.13981901 = queryWeight, product of:
                1.9177483 = boost
                4.50095 = idf(docFreq=1333, maxDocs=44218)
                0.016198337 = queryNorm
              0.60905266 = fieldWeight in 5273, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.50095 = idf(docFreq=1333, maxDocs=44218)
                0.078125 = fieldNorm(doc=5273)
          0.030362036 = weight(abstract_txt:results in 5273) [ClassicSimilarity], result of:
            0.030362036 = score(doc=5273,freq=1.0), product of:
              0.111598775 = queryWeight, product of:
                1.9783703 = boost
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.016198337 = queryNorm
              0.27206424 = fieldWeight in 5273, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.078125 = fieldNorm(doc=5273)
          0.20295987 = weight(abstract_txt:hierarchical in 5273) [ClassicSimilarity], result of:
            0.20295987 = score(doc=5273,freq=4.0), product of:
              0.22666235 = queryWeight, product of:
                2.4417334 = boost
                5.7307405 = idf(docFreq=389, maxDocs=44218)
                0.016198337 = queryNorm
              0.8954282 = fieldWeight in 5273, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.7307405 = idf(docFreq=389, maxDocs=44218)
                0.078125 = fieldNorm(doc=5273)
          0.17291832 = weight(abstract_txt:tree in 5273) [ClassicSimilarity], result of:
            0.17291832 = score(doc=5273,freq=1.0), product of:
              0.32336023 = queryWeight, product of:
                2.9164317 = boost
                6.8448567 = idf(docFreq=127, maxDocs=44218)
                0.016198337 = queryNorm
              0.53475446 = fieldWeight in 5273, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8448567 = idf(docFreq=127, maxDocs=44218)
                0.078125 = fieldNorm(doc=5273)
        0.36 = coord(9/25)
    
  5. Zhang, J.; Wolfram, D.; Wang, P.: Analysis of query keywords of sports-related queries using visualization and clustering (2009) 0.23
    0.22801717 = sum of:
      0.22801717 = product of:
        0.633381 = sum of:
          0.012547525 = weight(abstract_txt:other in 2947) [ClassicSimilarity], result of:
            0.012547525 = score(doc=2947,freq=1.0), product of:
              0.057026174 = queryWeight, product of:
                3.5204957 = idf(docFreq=3555, maxDocs=44218)
                0.016198337 = queryNorm
              0.22003098 = fieldWeight in 2947, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5204957 = idf(docFreq=3555, maxDocs=44218)
                0.0625 = fieldNorm(doc=2947)
          0.0060606524 = weight(abstract_txt:this in 2947) [ClassicSimilarity], result of:
            0.0060606524 = score(doc=2947,freq=1.0), product of:
              0.04018638 = queryWeight, product of:
                1.0281298 = boost
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.016198337 = queryNorm
              0.1508136 = fieldWeight in 2947, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.4130175 = idf(docFreq=10762, maxDocs=44218)
                0.0625 = fieldNorm(doc=2947)
          0.014601014 = weight(abstract_txt:into in 2947) [ClassicSimilarity], result of:
            0.014601014 = score(doc=2947,freq=1.0), product of:
              0.063089564 = queryWeight, product of:
                1.0518205 = boost
                3.7029297 = idf(docFreq=2962, maxDocs=44218)
                0.016198337 = queryNorm
              0.23143311 = fieldWeight in 2947, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7029297 = idf(docFreq=2962, maxDocs=44218)
                0.0625 = fieldNorm(doc=2947)
          0.031063389 = weight(abstract_txt:better in 2947) [ClassicSimilarity], result of:
            0.031063389 = score(doc=2947,freq=1.0), product of:
              0.10436016 = queryWeight, product of:
                1.3527895 = boost
                4.76249 = idf(docFreq=1026, maxDocs=44218)
                0.016198337 = queryNorm
              0.2976556 = fieldWeight in 2947, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.76249 = idf(docFreq=1026, maxDocs=44218)
                0.0625 = fieldNorm(doc=2947)
          0.039332397 = weight(abstract_txt:method in 2947) [ClassicSimilarity], result of:
            0.039332397 = score(doc=2947,freq=1.0), product of:
              0.13981901 = queryWeight, product of:
                1.9177483 = boost
                4.50095 = idf(docFreq=1333, maxDocs=44218)
                0.016198337 = queryNorm
              0.28130937 = fieldWeight in 2947, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.50095 = idf(docFreq=1333, maxDocs=44218)
                0.0625 = fieldNorm(doc=2947)
          0.024289628 = weight(abstract_txt:results in 2947) [ClassicSimilarity], result of:
            0.024289628 = score(doc=2947,freq=1.0), product of:
              0.111598775 = queryWeight, product of:
                1.9783703 = boost
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.016198337 = queryNorm
              0.21765138 = fieldWeight in 2947, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.482422 = idf(docFreq=3693, maxDocs=44218)
                0.0625 = fieldNorm(doc=2947)
          0.04876262 = weight(abstract_txt:search in 2947) [ClassicSimilarity], result of:
            0.04876262 = score(doc=2947,freq=3.0), product of:
              0.12313924 = queryWeight, product of:
                2.0781462 = boost
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.016198337 = queryNorm
              0.3959958 = fieldWeight in 2947, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.6580524 = idf(docFreq=3098, maxDocs=44218)
                0.0625 = fieldNorm(doc=2947)
          0.11481144 = weight(abstract_txt:hierarchical in 2947) [ClassicSimilarity], result of:
            0.11481144 = score(doc=2947,freq=2.0), product of:
              0.22666235 = queryWeight, product of:
                2.4417334 = boost
                5.7307405 = idf(docFreq=389, maxDocs=44218)
                0.016198337 = queryNorm
              0.5065307 = fieldWeight in 2947, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.7307405 = idf(docFreq=389, maxDocs=44218)
                0.0625 = fieldNorm(doc=2947)
          0.34191233 = weight(abstract_txt:clustering in 2947) [ClassicSimilarity], result of:
            0.34191233 = score(doc=2947,freq=2.0), product of:
              0.622288 = queryWeight, product of:
                6.180059 = boost
                6.2162485 = idf(docFreq=239, maxDocs=44218)
                0.016198337 = queryNorm
              0.5494439 = fieldWeight in 2947, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.2162485 = idf(docFreq=239, maxDocs=44218)
                0.0625 = fieldNorm(doc=2947)
        0.36 = coord(9/25)