Document (#40131)

Author
Olensky, M.
Schmidt, M.
Eck, N.J. van
Title
Evaluation of the citation matching algorithms of CWTS and iFQ in comparison to the Web of science
Source
Journal of the Association for Information Science and Technology. 67(2016) no.10, S.2550-2564
Year
2016
Abstract
The results of bibliometric studies provided by bibliometric research groups, for example, the Centre for Science and Technology Studies (CWTS) and the Institute for Research Information and Quality Assurance (iFQ), are often used in the process of research assessment. Their databases use Web of Science (WoS) citation data, which they match according to their own matching algorithms-in the case of CWTS for standard usage in their studies and in the case of iFQ on an experimental basis. Because the problem of nonmatched citations in the WoS persists due to inaccuracies in the references or inaccuracies introduced in the data extraction process, it is important to ascertain how well these inaccuracies are rectified in these citation matching algorithms. This article evaluates the algorithms of CWTS and iFQ in comparison to the WoS in a quantitative and a qualitative analysis. The analysis builds upon the method and the manually verified corpus of a previous study. The algorithm of CWTS performs best, closely followed by that of iFQ. The WoS algorithm still performs quite well (F1 score: 96.41%), but shows deficits in matching references containing inaccuracies. An additional problem is posed by incorrectly provided cited reference information in source articles by the WoS.
Content
Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23590/full.
Theme
Informetrie
Object
Web of science

Similar documents (author)

  1. Gradmann, S.; Olensky, M.: Semantische Kontextualisierung von Museumsbeständen in Europeana (2013) 2.24
    2.2382812 = sum of:
      2.2382812 = product of:
        4.4765625 = sum of:
          4.4765625 = weight(author_txt:olensky in 939) [ClassicSimilarity], result of:
            4.4765625 = score(doc=939,freq=1.0), product of:
              0.9038879 = queryWeight, product of:
                1.4536253 = boost
                9.905128 = idf(docFreq=5, maxDocs=44218)
                0.062777214 = queryNorm
              4.952564 = fieldWeight in 939, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.905128 = idf(docFreq=5, maxDocs=44218)
                0.5 = fieldNorm(doc=939)
        0.5 = coord(1/2)
    
  2. Stiller, J.; Olensky, M.; Petras, V.: ¬A framework for the evaluation of automatic metadata enrichments (2014) 1.68
    1.6787109 = sum of:
      1.6787109 = product of:
        3.3574219 = sum of:
          3.3574219 = weight(author_txt:olensky in 1587) [ClassicSimilarity], result of:
            3.3574219 = score(doc=1587,freq=1.0), product of:
              0.9038879 = queryWeight, product of:
                1.4536253 = boost
                9.905128 = idf(docFreq=5, maxDocs=44218)
                0.062777214 = queryNorm
              3.7144227 = fieldWeight in 1587, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.905128 = idf(docFreq=5, maxDocs=44218)
                0.375 = fieldNorm(doc=1587)
        0.5 = coord(1/2)
    
  3. Hennicke, S.; Olensky, M.; Boer, V. de; Isaac, A.; Wielemaker, J.: ¬A data model for cross-domain data representation : the "Europeana Data Model" in the case of archival and museum data (2010) 1.12
    1.1191406 = sum of:
      1.1191406 = product of:
        2.2382812 = sum of:
          2.2382812 = weight(author_txt:olensky in 4664) [ClassicSimilarity], result of:
            2.2382812 = score(doc=4664,freq=1.0), product of:
              0.9038879 = queryWeight, product of:
                1.4536253 = boost
                9.905128 = idf(docFreq=5, maxDocs=44218)
                0.062777214 = queryNorm
              2.476282 = fieldWeight in 4664, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.905128 = idf(docFreq=5, maxDocs=44218)
                0.25 = fieldNorm(doc=4664)
        0.5 = coord(1/2)
    
  4. Gradmann, S.; Iwanowa, J.; Dröge, E.; Hennicke, S.; Trkulja, V.; Olensky, M.; Stein, C.; Struck, A.; Baierer, K.: Modellierung und Ontologien im Wissensmanagement : Erfahrungen aus drei Projekten im Umfeld von Europeana und des DFG-Exzellenzclusters Bild Wissen Gestaltung an der Humboldt-Universität zu Berlin (2013) 0.98
    0.97924805 = sum of:
      0.97924805 = product of:
        1.9584961 = sum of:
          1.9584961 = weight(author_txt:olensky in 904) [ClassicSimilarity], result of:
            1.9584961 = score(doc=904,freq=1.0), product of:
              0.9038879 = queryWeight, product of:
                1.4536253 = boost
                9.905128 = idf(docFreq=5, maxDocs=44218)
                0.062777214 = queryNorm
              2.1667466 = fieldWeight in 904, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.905128 = idf(docFreq=5, maxDocs=44218)
                0.21875 = fieldNorm(doc=904)
        0.5 = coord(1/2)
    
  5. Schmidt, A.F.: Vorschläge für eine partielle Modifikation der Dezimalklassifikation - dargestellt im Rahmen einer Kurzbeschreibung der DK (1987) 0.91
    0.91089267 = sum of:
      0.91089267 = product of:
        1.8217853 = sum of:
          1.8217853 = weight(author_txt:schmidt in 226) [ClassicSimilarity], result of:
            1.8217853 = score(doc=226,freq=1.0), product of:
              0.4277693 = queryWeight, product of:
                6.8140855 = idf(docFreq=131, maxDocs=44218)
                0.062777214 = queryNorm
              4.2588034 = fieldWeight in 226, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8140855 = idf(docFreq=131, maxDocs=44218)
                0.625 = fieldNorm(doc=226)
        0.5 = coord(1/2)
    

Similar documents (content)

  1. Jiao, Q.G.; Onwuegbuzie, A.J.; Waytowich, V.L.: ¬The relationship between citation errors and library anxiety : an empirical study of doctoral students in education (2008) 0.14
    0.14451478 = sum of:
      0.14451478 = product of:
        0.7225739 = sum of:
          0.0148531515 = weight(abstract_txt:analysis in 2072) [ClassicSimilarity], result of:
            0.0148531515 = score(doc=2072,freq=1.0), product of:
              0.052037224 = queryWeight, product of:
                1.0105257 = boost
                3.6535451 = idf(docFreq=3112, maxDocs=44218)
                0.014094585 = queryNorm
              0.2854332 = fieldWeight in 2072, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.6535451 = idf(docFreq=3112, maxDocs=44218)
                0.078125 = fieldNorm(doc=2072)
          0.0145573765 = weight(abstract_txt:research in 2072) [ClassicSimilarity], result of:
            0.0145573765 = score(doc=2072,freq=1.0), product of:
              0.05877431 = queryWeight, product of:
                1.3153149 = boost
                3.170338 = idf(docFreq=5046, maxDocs=44218)
                0.014094585 = queryNorm
              0.24768265 = fieldWeight in 2072, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.170338 = idf(docFreq=5046, maxDocs=44218)
                0.078125 = fieldNorm(doc=2072)
          0.035516284 = weight(abstract_txt:studies in 2072) [ClassicSimilarity], result of:
            0.035516284 = score(doc=2072,freq=1.0), product of:
              0.10651656 = queryWeight, product of:
                1.7706981 = boost
                4.26796 = idf(docFreq=1683, maxDocs=44218)
                0.014094585 = queryNorm
              0.33343437 = fieldWeight in 2072, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.26796 = idf(docFreq=1683, maxDocs=44218)
                0.078125 = fieldNorm(doc=2072)
          0.09290565 = weight(abstract_txt:citation in 2072) [ClassicSimilarity], result of:
            0.09290565 = score(doc=2072,freq=3.0), product of:
              0.14021242 = queryWeight, product of:
                2.0315578 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.014094585 = queryNorm
              0.6626064 = fieldWeight in 2072, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.078125 = fieldNorm(doc=2072)
          0.56474143 = weight(abstract_txt:inaccuracies in 2072) [ClassicSimilarity], result of:
            0.56474143 = score(doc=2072,freq=1.0), product of:
              0.74132985 = queryWeight, product of:
                5.3940015 = boost
                9.7509775 = idf(docFreq=6, maxDocs=44218)
                0.014094585 = queryNorm
              0.7617951 = fieldWeight in 2072, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.7509775 = idf(docFreq=6, maxDocs=44218)
                0.078125 = fieldNorm(doc=2072)
        0.2 = coord(5/25)
    
  2. Zhao, D.; Strotmann, A.: Intellectual structure of information science 2011-2020 : an author co-citation analysis (2022) 0.11
    0.11059606 = sum of:
      0.11059606 = product of:
        0.27649015 = sum of:
          0.019927597 = weight(abstract_txt:analysis in 610) [ClassicSimilarity], result of:
            0.019927597 = score(doc=610,freq=5.0), product of:
              0.052037224 = queryWeight, product of:
                1.0105257 = boost
                3.6535451 = idf(docFreq=3112, maxDocs=44218)
                0.014094585 = queryNorm
              0.38294888 = fieldWeight in 610, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                3.6535451 = idf(docFreq=3112, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
          0.010894941 = weight(abstract_txt:well in 610) [ClassicSimilarity], result of:
            0.010894941 = score(doc=610,freq=1.0), product of:
              0.0594955 = queryWeight, product of:
                1.080519 = boost
                3.9066048 = idf(docFreq=2416, maxDocs=44218)
                0.014094585 = queryNorm
              0.1831221 = fieldWeight in 610, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9066048 = idf(docFreq=2416, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
          0.012148339 = weight(abstract_txt:process in 610) [ClassicSimilarity], result of:
            0.012148339 = score(doc=610,freq=1.0), product of:
              0.063975275 = queryWeight, product of:
                1.12046 = boost
                4.0510116 = idf(docFreq=2091, maxDocs=44218)
                0.014094585 = queryNorm
              0.18989116 = fieldWeight in 610, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.0510116 = idf(docFreq=2091, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
          0.008645151 = weight(abstract_txt:their in 610) [ClassicSimilarity], result of:
            0.008645151 = score(doc=610,freq=1.0), product of:
              0.05837313 = queryWeight, product of:
                1.3108182 = boost
                3.1594994 = idf(docFreq=5101, maxDocs=44218)
                0.014094585 = queryNorm
              0.14810154 = fieldWeight in 610, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.1594994 = idf(docFreq=5101, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
          0.019530771 = weight(abstract_txt:research in 610) [ClassicSimilarity], result of:
            0.019530771 = score(doc=610,freq=5.0), product of:
              0.05877431 = queryWeight, product of:
                1.3153149 = boost
                3.170338 = idf(docFreq=5046, maxDocs=44218)
                0.014094585 = queryNorm
              0.33230114 = fieldWeight in 610, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                3.170338 = idf(docFreq=5046, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
          0.021647898 = weight(abstract_txt:provided in 610) [ClassicSimilarity], result of:
            0.021647898 = score(doc=610,freq=1.0), product of:
              0.09403251 = queryWeight, product of:
                1.3584052 = boost
                4.9112997 = idf(docFreq=884, maxDocs=44218)
                0.014094585 = queryNorm
              0.23021717 = fieldWeight in 610, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9112997 = idf(docFreq=884, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
          0.038642325 = weight(abstract_txt:science in 610) [ClassicSimilarity], result of:
            0.038642325 = score(doc=610,freq=6.0), product of:
              0.08716786 = queryWeight, product of:
                1.6018215 = boost
                3.8609126 = idf(docFreq=2529, maxDocs=44218)
                0.014094585 = queryNorm
              0.44330934 = fieldWeight in 610, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                3.8609126 = idf(docFreq=2529, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
          0.04295214 = weight(abstract_txt:bibliometric in 610) [ClassicSimilarity], result of:
            0.04295214 = score(doc=610,freq=1.0), product of:
              0.14847639 = queryWeight, product of:
                1.706943 = boost
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.014094585 = queryNorm
              0.289286 = fieldWeight in 610, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1714344 = idf(docFreq=250, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
          0.030136568 = weight(abstract_txt:studies in 610) [ClassicSimilarity], result of:
            0.030136568 = score(doc=610,freq=2.0), product of:
              0.10651656 = queryWeight, product of:
                1.7706981 = boost
                4.26796 = idf(docFreq=1683, maxDocs=44218)
                0.014094585 = queryNorm
              0.28292847 = fieldWeight in 610, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.26796 = idf(docFreq=1683, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
          0.071964405 = weight(abstract_txt:citation in 610) [ClassicSimilarity], result of:
            0.071964405 = score(doc=610,freq=5.0), product of:
              0.14021242 = queryWeight, product of:
                2.0315578 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.014094585 = queryNorm
              0.51325274 = fieldWeight in 610, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.046875 = fieldNorm(doc=610)
        0.4 = coord(10/25)
    
  3. Tang, R.; Safer, M.A.: Author-rated importance of cited references in biology and psychology publications (2008) 0.11
    0.1100494 = sum of:
      0.1100494 = product of:
        0.34390438 = sum of:
          0.012710764 = weight(abstract_txt:well in 1738) [ClassicSimilarity], result of:
            0.012710764 = score(doc=1738,freq=1.0), product of:
              0.0594955 = queryWeight, product of:
                1.080519 = boost
                3.9066048 = idf(docFreq=2416, maxDocs=44218)
                0.014094585 = queryNorm
              0.21364245 = fieldWeight in 1738, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9066048 = idf(docFreq=2416, maxDocs=44218)
                0.0546875 = fieldNorm(doc=1738)
          0.010086008 = weight(abstract_txt:their in 1738) [ClassicSimilarity], result of:
            0.010086008 = score(doc=1738,freq=1.0), product of:
              0.05837313 = queryWeight, product of:
                1.3108182 = boost
                3.1594994 = idf(docFreq=5101, maxDocs=44218)
                0.014094585 = queryNorm
              0.17278512 = fieldWeight in 1738, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.1594994 = idf(docFreq=5101, maxDocs=44218)
                0.0546875 = fieldNorm(doc=1738)
          0.010190164 = weight(abstract_txt:research in 1738) [ClassicSimilarity], result of:
            0.010190164 = score(doc=1738,freq=1.0), product of:
              0.05877431 = queryWeight, product of:
                1.3153149 = boost
                3.170338 = idf(docFreq=5046, maxDocs=44218)
                0.014094585 = queryNorm
              0.17337786 = fieldWeight in 1738, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.170338 = idf(docFreq=5046, maxDocs=44218)
                0.0546875 = fieldNorm(doc=1738)
          0.052978486 = weight(abstract_txt:references in 1738) [ClassicSimilarity], result of:
            0.052978486 = score(doc=1738,freq=2.0), product of:
              0.12229988 = queryWeight, product of:
                1.5491852 = boost
                5.601063 = idf(docFreq=443, maxDocs=44218)
                0.014094585 = queryNorm
              0.4331851 = fieldWeight in 1738, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.601063 = idf(docFreq=443, maxDocs=44218)
                0.0546875 = fieldNorm(doc=1738)
          0.01840494 = weight(abstract_txt:science in 1738) [ClassicSimilarity], result of:
            0.01840494 = score(doc=1738,freq=1.0), product of:
              0.08716786 = queryWeight, product of:
                1.6018215 = boost
                3.8609126 = idf(docFreq=2529, maxDocs=44218)
                0.014094585 = queryNorm
              0.21114366 = fieldWeight in 1738, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8609126 = idf(docFreq=2529, maxDocs=44218)
                0.0546875 = fieldNorm(doc=1738)
          0.0248614 = weight(abstract_txt:studies in 1738) [ClassicSimilarity], result of:
            0.0248614 = score(doc=1738,freq=1.0), product of:
              0.10651656 = queryWeight, product of:
                1.7706981 = boost
                4.26796 = idf(docFreq=1683, maxDocs=44218)
                0.014094585 = queryNorm
              0.23340407 = fieldWeight in 1738, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.26796 = idf(docFreq=1683, maxDocs=44218)
                0.0546875 = fieldNorm(doc=1738)
          0.13537899 = weight(abstract_txt:citation in 1738) [ClassicSimilarity], result of:
            0.13537899 = score(doc=1738,freq=13.0), product of:
              0.14021242 = queryWeight, product of:
                2.0315578 = boost
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.014094585 = queryNorm
              0.9655278 = fieldWeight in 1738, product of:
                3.6055512 = tf(freq=13.0), with freq of:
                  13.0 = termFreq=13.0
                4.896717 = idf(docFreq=897, maxDocs=44218)
                0.0546875 = fieldNorm(doc=1738)
          0.07929361 = weight(abstract_txt:algorithms in 1738) [ClassicSimilarity], result of:
            0.07929361 = score(doc=1738,freq=1.0), product of:
              0.25402227 = queryWeight, product of:
                3.1574843 = boost
                5.707926 = idf(docFreq=398, maxDocs=44218)
                0.014094585 = queryNorm
              0.3121522 = fieldWeight in 1738, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.707926 = idf(docFreq=398, maxDocs=44218)
                0.0546875 = fieldNorm(doc=1738)
        0.32 = coord(8/25)
    
  4. Schneider, J.W.; Borlund, P.: Matrix comparison, part 2 : measuring the resemblance between proximity measures or ordination results by use of the mantel and procrustes statistics (2007) 0.10
    0.09747523 = sum of:
      0.09747523 = product of:
        0.3046101 = sum of:
          0.025467852 = weight(abstract_txt:analysis in 582) [ClassicSimilarity], result of:
            0.025467852 = score(doc=582,freq=6.0), product of:
              0.052037224 = queryWeight, product of:
                1.0105257 = boost
                3.6535451 = idf(docFreq=3112, maxDocs=44218)
                0.014094585 = queryNorm
              0.48941603 = fieldWeight in 582, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                3.6535451 = idf(docFreq=3112, maxDocs=44218)
                0.0546875 = fieldNorm(doc=582)
          0.012710764 = weight(abstract_txt:well in 582) [ClassicSimilarity], result of:
            0.012710764 = score(doc=582,freq=1.0), product of:
              0.0594955 = queryWeight, product of:
                1.080519 = boost
                3.9066048 = idf(docFreq=2416, maxDocs=44218)
                0.014094585 = queryNorm
              0.21364245 = fieldWeight in 582, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9066048 = idf(docFreq=2416, maxDocs=44218)
                0.0546875 = fieldNorm(doc=582)
          0.014263771 = weight(abstract_txt:their in 582) [ClassicSimilarity], result of:
            0.014263771 = score(doc=582,freq=2.0), product of:
              0.05837313 = queryWeight, product of:
                1.3108182 = boost
                3.1594994 = idf(docFreq=5101, maxDocs=44218)
                0.014094585 = queryNorm
              0.24435507 = fieldWeight in 582, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.1594994 = idf(docFreq=5101, maxDocs=44218)
                0.0546875 = fieldNorm(doc=582)
          0.02368513 = weight(abstract_txt:case in 582) [ClassicSimilarity], result of:
            0.02368513 = score(doc=582,freq=1.0), product of:
              0.09009213 = queryWeight, product of:
                1.329639 = boost
                4.807296 = idf(docFreq=981, maxDocs=44218)
                0.014094585 = queryNorm
              0.26289898 = fieldWeight in 582, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.807296 = idf(docFreq=981, maxDocs=44218)
                0.0546875 = fieldNorm(doc=582)
          0.025255881 = weight(abstract_txt:provided in 582) [ClassicSimilarity], result of:
            0.025255881 = score(doc=582,freq=1.0), product of:
              0.09403251 = queryWeight, product of:
                1.3584052 = boost
                4.9112997 = idf(docFreq=884, maxDocs=44218)
                0.014094585 = queryNorm
              0.2685867 = fieldWeight in 582, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9112997 = idf(docFreq=884, maxDocs=44218)
                0.0546875 = fieldNorm(doc=582)
          0.06584201 = weight(abstract_txt:comparison in 582) [ClassicSimilarity], result of:
            0.06584201 = score(doc=582,freq=3.0), product of:
              0.123499334 = queryWeight, product of:
                1.5567634 = boost
                5.628462 = idf(docFreq=431, maxDocs=44218)
                0.014094585 = queryNorm
              0.53313655 = fieldWeight in 582, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.628462 = idf(docFreq=431, maxDocs=44218)
                0.0546875 = fieldNorm(doc=582)
          0.043061204 = weight(abstract_txt:studies in 582) [ClassicSimilarity], result of:
            0.043061204 = score(doc=582,freq=3.0), product of:
              0.10651656 = queryWeight, product of:
                1.7706981 = boost
                4.26796 = idf(docFreq=1683, maxDocs=44218)
                0.014094585 = queryNorm
              0.4042677 = fieldWeight in 582, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.26796 = idf(docFreq=1683, maxDocs=44218)
                0.0546875 = fieldNorm(doc=582)
          0.094323486 = weight(abstract_txt:matching in 582) [ClassicSimilarity], result of:
            0.094323486 = score(doc=582,freq=1.0), product of:
              0.2851847 = queryWeight, product of:
                3.345557 = boost
                6.047913 = idf(docFreq=283, maxDocs=44218)
                0.014094585 = queryNorm
              0.33074525 = fieldWeight in 582, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.047913 = idf(docFreq=283, maxDocs=44218)
                0.0546875 = fieldNorm(doc=582)
        0.32 = coord(8/25)
    
  5. Golub, K.; Hamon, T.; Ardö, A.: Automated classification of textual documents based on a controlled vocabulary in engineering (2007) 0.10
    0.09717786 = sum of:
      0.09717786 = product of:
        0.40490776 = sum of:
          0.014526588 = weight(abstract_txt:well in 1461) [ClassicSimilarity], result of:
            0.014526588 = score(doc=1461,freq=1.0), product of:
              0.0594955 = queryWeight, product of:
                1.080519 = boost
                3.9066048 = idf(docFreq=2416, maxDocs=44218)
                0.014094585 = queryNorm
              0.2441628 = fieldWeight in 1461, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9066048 = idf(docFreq=2416, maxDocs=44218)
                0.0625 = fieldNorm(doc=1461)
          0.011645902 = weight(abstract_txt:research in 1461) [ClassicSimilarity], result of:
            0.011645902 = score(doc=1461,freq=1.0), product of:
              0.05877431 = queryWeight, product of:
                1.3153149 = boost
                3.170338 = idf(docFreq=5046, maxDocs=44218)
                0.014094585 = queryNorm
              0.19814612 = fieldWeight in 1461, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.170338 = idf(docFreq=5046, maxDocs=44218)
                0.0625 = fieldNorm(doc=1461)
          0.045251057 = weight(abstract_txt:algorithm in 1461) [ClassicSimilarity], result of:
            0.045251057 = score(doc=1461,freq=1.0), product of:
              0.12689978 = queryWeight, product of:
                1.5780499 = boost
                5.705423 = idf(docFreq=399, maxDocs=44218)
                0.014094585 = queryNorm
              0.35658893 = fieldWeight in 1461, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.705423 = idf(docFreq=399, maxDocs=44218)
                0.0625 = fieldNorm(doc=1461)
          0.0904132 = weight(abstract_txt:performs in 1461) [ClassicSimilarity], result of:
            0.0904132 = score(doc=1461,freq=1.0), product of:
              0.20130888 = queryWeight, product of:
                1.987567 = boost
                7.1860275 = idf(docFreq=90, maxDocs=44218)
                0.014094585 = queryNorm
              0.44912672 = fieldWeight in 1461, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1860275 = idf(docFreq=90, maxDocs=44218)
                0.0625 = fieldNorm(doc=1461)
          0.09062127 = weight(abstract_txt:algorithms in 1461) [ClassicSimilarity], result of:
            0.09062127 = score(doc=1461,freq=1.0), product of:
              0.25402227 = queryWeight, product of:
                3.1574843 = boost
                5.707926 = idf(docFreq=398, maxDocs=44218)
                0.014094585 = queryNorm
              0.35674536 = fieldWeight in 1461, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.707926 = idf(docFreq=398, maxDocs=44218)
                0.0625 = fieldNorm(doc=1461)
          0.15244977 = weight(abstract_txt:matching in 1461) [ClassicSimilarity], result of:
            0.15244977 = score(doc=1461,freq=2.0), product of:
              0.2851847 = queryWeight, product of:
                3.345557 = boost
                6.047913 = idf(docFreq=283, maxDocs=44218)
                0.014094585 = queryNorm
              0.53456503 = fieldWeight in 1461, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.047913 = idf(docFreq=283, maxDocs=44218)
                0.0625 = fieldNorm(doc=1461)
        0.24 = coord(6/25)