Search (7 results, page 1 of 1)

  • × author_ss:"Leydesdorff, L."
  • × theme_ss:"Citation indexing"
  • × year_i:[2000 TO 2010}
  1. Leydesdorff, L.: Dynamic and evolutionary updates of classificatory schemes in scientific journal structures (2002) 0.01
    0.009384007 = product of:
      0.02815202 = sum of:
        0.02815202 = product of:
          0.05630404 = sum of:
            0.05630404 = weight(_text_:indexing in 1249) [ClassicSimilarity], result of:
              0.05630404 = score(doc=1249,freq=2.0), product of:
                0.19018644 = queryWeight, product of:
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.049684696 = queryNorm
                0.29604656 = fieldWeight in 1249, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1249)
          0.5 = coord(1/2)
      0.33333334 = coord(1/3)
    
    Theme
    Citation indexing
  2. Leydesdorff, L.: Clusters and maps of science journals based on bi-connected graphs in Journal Citation Reports (2004) 0.01
    0.0080434345 = product of:
      0.024130303 = sum of:
        0.024130303 = product of:
          0.048260607 = sum of:
            0.048260607 = weight(_text_:indexing in 4427) [ClassicSimilarity], result of:
              0.048260607 = score(doc=4427,freq=2.0), product of:
                0.19018644 = queryWeight, product of:
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.049684696 = queryNorm
                0.2537542 = fieldWeight in 4427, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4427)
          0.5 = coord(1/2)
      0.33333334 = coord(1/3)
    
    Theme
    Citation indexing
  3. Leydesdorff, L.; Bihui, J.: Mapping the Chinese Science Citation Database in terms of aggregated journal-journal citation relations (2005) 0.01
    0.0080434345 = product of:
      0.024130303 = sum of:
        0.024130303 = product of:
          0.048260607 = sum of:
            0.048260607 = weight(_text_:indexing in 4813) [ClassicSimilarity], result of:
              0.048260607 = score(doc=4813,freq=2.0), product of:
                0.19018644 = queryWeight, product of:
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.049684696 = queryNorm
                0.2537542 = fieldWeight in 4813, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.046875 = fieldNorm(doc=4813)
          0.5 = coord(1/2)
      0.33333334 = coord(1/3)
    
    Theme
    Citation indexing
  4. Leydesdorff, L.: Can scientific journals be classified in terms of aggregated journal-journal citation relations using the Journal Citation Reports? (2006) 0.01
    0.0080434345 = product of:
      0.024130303 = sum of:
        0.024130303 = product of:
          0.048260607 = sum of:
            0.048260607 = weight(_text_:indexing in 5046) [ClassicSimilarity], result of:
              0.048260607 = score(doc=5046,freq=2.0), product of:
                0.19018644 = queryWeight, product of:
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.049684696 = queryNorm
                0.2537542 = fieldWeight in 5046, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.046875 = fieldNorm(doc=5046)
          0.5 = coord(1/2)
      0.33333334 = coord(1/3)
    
    Theme
    Citation indexing
  5. Leydesdorff, L.: On the normalization and visualization of author co-citation data : Salton's Cosine versus the Jaccard index (2008) 0.01
    0.0080434345 = product of:
      0.024130303 = sum of:
        0.024130303 = product of:
          0.048260607 = sum of:
            0.048260607 = weight(_text_:indexing in 1341) [ClassicSimilarity], result of:
              0.048260607 = score(doc=1341,freq=2.0), product of:
                0.19018644 = queryWeight, product of:
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.049684696 = queryNorm
                0.2537542 = fieldWeight in 1341, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.046875 = fieldNorm(doc=1341)
          0.5 = coord(1/2)
      0.33333334 = coord(1/3)
    
    Theme
    Citation indexing
  6. Leydesdorff, L.: Caveats for the use of citation indicators in research and journal evaluations (2008) 0.01
    0.0080434345 = product of:
      0.024130303 = sum of:
        0.024130303 = product of:
          0.048260607 = sum of:
            0.048260607 = weight(_text_:indexing in 1361) [ClassicSimilarity], result of:
              0.048260607 = score(doc=1361,freq=2.0), product of:
                0.19018644 = queryWeight, product of:
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.049684696 = queryNorm
                0.2537542 = fieldWeight in 1361, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.046875 = fieldNorm(doc=1361)
          0.5 = coord(1/2)
      0.33333334 = coord(1/3)
    
    Theme
    Citation indexing
  7. Leydesdorff, L.: Visualization of the citation impact environments of scientific journals : an online mapping exercise (2007) 0.01
    0.0067028617 = product of:
      0.020108584 = sum of:
        0.020108584 = product of:
          0.04021717 = sum of:
            0.04021717 = weight(_text_:indexing in 82) [ClassicSimilarity], result of:
              0.04021717 = score(doc=82,freq=2.0), product of:
                0.19018644 = queryWeight, product of:
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.049684696 = queryNorm
                0.21146181 = fieldWeight in 82, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.8278677 = idf(docFreq=2614, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=82)
          0.5 = coord(1/2)
      0.33333334 = coord(1/3)
    
    Theme
    Citation indexing