Search (16 results, page 1 of 1)

  • × theme_ss:"Automatisches Indexieren"
  • × theme_ss:"Retrievalstudien"
  • × type_ss:"a"
  1. Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.06
    0.060526244 = product of:
      0.12105249 = sum of:
        0.12105249 = sum of:
          0.025620386 = weight(_text_:d in 262) [ClassicSimilarity], result of:
            0.025620386 = score(doc=262,freq=2.0), product of:
              0.0871823 = queryWeight, product of:
                1.899872 = idf(docFreq=17979, maxDocs=44218)
                0.045888513 = queryNorm
              0.29387143 = fieldWeight in 262, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                1.899872 = idf(docFreq=17979, maxDocs=44218)
                0.109375 = fieldNorm(doc=262)
          0.008390464 = weight(_text_:s in 262) [ClassicSimilarity], result of:
            0.008390464 = score(doc=262,freq=2.0), product of:
              0.049891718 = queryWeight, product of:
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.045888513 = queryNorm
              0.16817348 = fieldWeight in 262, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                1.0872376 = idf(docFreq=40523, maxDocs=44218)
                0.109375 = fieldNorm(doc=262)
          0.08704164 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
            0.08704164 = score(doc=262,freq=2.0), product of:
              0.16069375 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045888513 = queryNorm
              0.5416616 = fieldWeight in 262, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.109375 = fieldNorm(doc=262)
      0.5 = coord(1/2)
    
    Date
    20.10.2000 12:22:23
    Language
    d
    Pages
    S.319-339
  2. Hodges, P.R.: Keyword in title indexes : effectiveness of retrieval in computer searches (1983) 0.02
    0.01590535 = product of:
      0.0318107 = sum of:
        0.0318107 = product of:
          0.04771605 = sum of:
            0.004195232 = weight(_text_:s in 5001) [ClassicSimilarity], result of:
              0.004195232 = score(doc=5001,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.08408674 = fieldWeight in 5001, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=5001)
            0.04352082 = weight(_text_:22 in 5001) [ClassicSimilarity], result of:
              0.04352082 = score(doc=5001,freq=2.0), product of:
                0.16069375 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045888513 = queryNorm
                0.2708308 = fieldWeight in 5001, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=5001)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Date
    14. 3.1996 13:22:21
    Source
    Special libraries. 74(1983) no.1, S. 56-60
  3. Biebricher, P.; Fuhr, N.; Niewelt, B.: ¬Der AIR-Retrievaltest (1986) 0.01
    0.008097822 = product of:
      0.016195644 = sum of:
        0.016195644 = product of:
          0.024293464 = sum of:
            0.018300276 = weight(_text_:d in 4040) [ClassicSimilarity], result of:
              0.018300276 = score(doc=4040,freq=2.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.20990817 = fieldWeight in 4040, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.078125 = fieldNorm(doc=4040)
            0.0059931884 = weight(_text_:s in 4040) [ClassicSimilarity], result of:
              0.0059931884 = score(doc=4040,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.120123915 = fieldWeight in 4040, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.078125 = fieldNorm(doc=4040)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Language
    d
    Pages
    S.127-143
  4. Krause, J.; Womser-Hacker, C.: PADOK-II : Retrievaltests zur Bewertung von Volltextindexierungsvarianten für das deutsche Patentinformationssystem (1990) 0.01
    0.0064782575 = product of:
      0.012956515 = sum of:
        0.012956515 = product of:
          0.019434772 = sum of:
            0.014640221 = weight(_text_:d in 2653) [ClassicSimilarity], result of:
              0.014640221 = score(doc=2653,freq=2.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.16792654 = fieldWeight in 2653, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.0625 = fieldNorm(doc=2653)
            0.0047945506 = weight(_text_:s in 2653) [ClassicSimilarity], result of:
              0.0047945506 = score(doc=2653,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.09609913 = fieldWeight in 2653, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0625 = fieldNorm(doc=2653)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Language
    d
    Source
    Nachrichten für Dokumentation. 41(1990) H.1, S.13-19
  5. Chevallet, J.-P.; Bruandet, M.F.: Impact de l'utilisation de multi terms sur la qualité des résponses dùn système de recherche d'information a indexation automatique (1999) 0.01
    0.0064782575 = product of:
      0.012956515 = sum of:
        0.012956515 = product of:
          0.019434772 = sum of:
            0.014640221 = weight(_text_:d in 6253) [ClassicSimilarity], result of:
              0.014640221 = score(doc=6253,freq=2.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.16792654 = fieldWeight in 6253, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.0625 = fieldNorm(doc=6253)
            0.0047945506 = weight(_text_:s in 6253) [ClassicSimilarity], result of:
              0.0047945506 = score(doc=6253,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.09609913 = fieldWeight in 6253, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0625 = fieldNorm(doc=6253)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Footnote
    Übers. d. Titels: Impact of the use of multi-terms on the quality of the answers of an information retrieval system based on automatic indexing
    Pages
    S.223-238
  6. Grummann, M.: Sind Verfahren zur maschinellen Indexierung für Literaturbestände Öffentlicher Bibliotheken geeignet? : Retrievaltests von indexierten ekz-Daten mit der Software IDX (2000) 0.01
    0.0064782575 = product of:
      0.012956515 = sum of:
        0.012956515 = product of:
          0.019434772 = sum of:
            0.014640221 = weight(_text_:d in 1879) [ClassicSimilarity], result of:
              0.014640221 = score(doc=1879,freq=2.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.16792654 = fieldWeight in 1879, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.0625 = fieldNorm(doc=1879)
            0.0047945506 = weight(_text_:s in 1879) [ClassicSimilarity], result of:
              0.0047945506 = score(doc=1879,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.09609913 = fieldWeight in 1879, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0625 = fieldNorm(doc=1879)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Language
    d
    Source
    Bibliothek: Forschung und Praxis. 24(2000) H.3, S.297-318
  7. Lepsky, K.; Siepmann, J.; Zimmermann, A.: Automatische Indexierung für Online-Kataloge : Ergebnisse eines Retrievaltests (1996) 0.01
    0.0056684753 = product of:
      0.011336951 = sum of:
        0.011336951 = product of:
          0.017005425 = sum of:
            0.012810193 = weight(_text_:d in 3251) [ClassicSimilarity], result of:
              0.012810193 = score(doc=3251,freq=2.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.14693572 = fieldWeight in 3251, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=3251)
            0.004195232 = weight(_text_:s in 3251) [ClassicSimilarity], result of:
              0.004195232 = score(doc=3251,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.08408674 = fieldWeight in 3251, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=3251)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Language
    d
    Source
    Zeitschrift für Bibliothekswesen und Bibliographie. 43(1996) H.1, S.47-56
  8. Gödert, W.; Liebig, M.: Maschinelle Indexierung auf dem Prüfstand : Ergebnisse eines Retrievaltests zum MILOS II Projekt (1997) 0.01
    0.0056684753 = product of:
      0.011336951 = sum of:
        0.011336951 = product of:
          0.017005425 = sum of:
            0.012810193 = weight(_text_:d in 1174) [ClassicSimilarity], result of:
              0.012810193 = score(doc=1174,freq=2.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.14693572 = fieldWeight in 1174, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1174)
            0.004195232 = weight(_text_:s in 1174) [ClassicSimilarity], result of:
              0.004195232 = score(doc=1174,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.08408674 = fieldWeight in 1174, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1174)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Language
    d
    Source
    Bibliotheksdienst. 31(1997) H.1, S.59-68
  9. Rapke, K.: Automatische Indexierung von Volltexten für die Gruner+Jahr Pressedatenbank (2001) 0.01
    0.0053122817 = product of:
      0.010624563 = sum of:
        0.010624563 = product of:
          0.015936844 = sum of:
            0.01294025 = weight(_text_:d in 5863) [ClassicSimilarity], result of:
              0.01294025 = score(doc=5863,freq=4.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.1484275 = fieldWeight in 5863, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=5863)
            0.0029965942 = weight(_text_:s in 5863) [ClassicSimilarity], result of:
              0.0029965942 = score(doc=5863,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.060061958 = fieldWeight in 5863, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=5863)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Language
    d
    Location
    D
    Pages
    S.321-342
  10. Rapke, K.: Automatische Indexierung von Volltexten für die Gruner+Jahr Pressedatenbank (2001) 0.00
    0.004858693 = product of:
      0.009717386 = sum of:
        0.009717386 = product of:
          0.014576078 = sum of:
            0.010980166 = weight(_text_:d in 6386) [ClassicSimilarity], result of:
              0.010980166 = score(doc=6386,freq=2.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.1259449 = fieldWeight in 6386, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.046875 = fieldNorm(doc=6386)
            0.0035959128 = weight(_text_:s in 6386) [ClassicSimilarity], result of:
              0.0035959128 = score(doc=6386,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.072074346 = fieldWeight in 6386, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046875 = fieldNorm(doc=6386)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Language
    d
    Source
    nfd Information - Wissenschaft und Praxis. 52(2001) H.5, S.251-262
  11. Oberhauser, O.; Labner, J.: OPAC-Erweiterung durch automatische Indexierung : Empirische Untersuchung mit Daten aus dem Österreichischen Verbundkatalog (2002) 0.00
    0.004858693 = product of:
      0.009717386 = sum of:
        0.009717386 = product of:
          0.014576078 = sum of:
            0.010980166 = weight(_text_:d in 883) [ClassicSimilarity], result of:
              0.010980166 = score(doc=883,freq=2.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.1259449 = fieldWeight in 883, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.046875 = fieldNorm(doc=883)
            0.0035959128 = weight(_text_:s in 883) [ClassicSimilarity], result of:
              0.0035959128 = score(doc=883,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.072074346 = fieldWeight in 883, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046875 = fieldNorm(doc=883)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Language
    d
    Source
    ABI-Technik. 23(2003) H.4, S.305-314
  12. Mielke, B.: Wider einige gängige Ansichten zur juristischen Informationserschließung (2002) 0.00
    0.004858693 = product of:
      0.009717386 = sum of:
        0.009717386 = product of:
          0.014576078 = sum of:
            0.010980166 = weight(_text_:d in 2145) [ClassicSimilarity], result of:
              0.010980166 = score(doc=2145,freq=2.0), product of:
                0.0871823 = queryWeight, product of:
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.045888513 = queryNorm
                0.1259449 = fieldWeight in 2145, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.899872 = idf(docFreq=17979, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2145)
            0.0035959128 = weight(_text_:s in 2145) [ClassicSimilarity], result of:
              0.0035959128 = score(doc=2145,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.072074346 = fieldWeight in 2145, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2145)
          0.6666667 = coord(2/3)
      0.5 = coord(1/2)
    
    Language
    d
    Pages
    S.273-287
  13. Lochbaum, K.E.; Streeter, A.R.: Comparing and combining the effectiveness of latent semantic indexing and the ordinary vector space model for information retrieval (1989) 0.00
    8.475649E-4 = product of:
      0.0016951298 = sum of:
        0.0016951298 = product of:
          0.005085389 = sum of:
            0.005085389 = weight(_text_:s in 3458) [ClassicSimilarity], result of:
              0.005085389 = score(doc=3458,freq=4.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.101928525 = fieldWeight in 3458, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046875 = fieldNorm(doc=3458)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Abstract
    A retrievalsystem was built to find individuals with appropriate expertise within a large research establishment on the basis of their authored documents. The expert-locating system uses a new method for automatic indexing and retrieval based on singular value decomposition, a matrix decomposition technique related to the factor analysis. Organizational groups, represented by the documents they write, and the terms contained in these documents, are fit simultaneously into a 100-dimensional "semantic" space. User queries are positioned in the semantic space, and the most similar groups are returned to the user. Here we compared the standard vector-space model with this new technique and found that combining the two methods improved performance over either alone. We also examined the effects of various experimental variables on the system`s retrieval accuracy. In particular, the effects of: term weighting functions in the semantic space construction and in query construction, suffix stripping, and using lexical units larger than a a single word were studied.
    Source
    Information processing and management. 25(1989) no.6, S. 665-676
  14. Wan, T.-L.; Evens, M.; Wan, Y.-W.; Pao, Y.-Y.: Experiments with automatic indexing and a relational thesaurus in a Chinese information retrieval system (1997) 0.00
    6.992053E-4 = product of:
      0.0013984106 = sum of:
        0.0013984106 = product of:
          0.004195232 = sum of:
            0.004195232 = weight(_text_:s in 956) [ClassicSimilarity], result of:
              0.004195232 = score(doc=956,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.08408674 = fieldWeight in 956, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=956)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science. 48(1997) no.12, S.1086-1096
  15. Munkelt, J.: Erstellung einer DNB-Retrieval-Testkollektion (2018) 0.00
    6.992053E-4 = product of:
      0.0013984106 = sum of:
        0.0013984106 = product of:
          0.004195232 = sum of:
            0.004195232 = weight(_text_:s in 4310) [ClassicSimilarity], result of:
              0.004195232 = score(doc=4310,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.08408674 = fieldWeight in 4310, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=4310)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Pages
    II, 79 S
  16. Buckley, C.; Allan, J.; Salton, G.: Automatic routing and retrieval using Smart : TREC-2 (1995) 0.00
    5.993188E-4 = product of:
      0.0011986376 = sum of:
        0.0011986376 = product of:
          0.0035959128 = sum of:
            0.0035959128 = weight(_text_:s in 5699) [ClassicSimilarity], result of:
              0.0035959128 = score(doc=5699,freq=2.0), product of:
                0.049891718 = queryWeight, product of:
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.045888513 = queryNorm
                0.072074346 = fieldWeight in 5699, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.0872376 = idf(docFreq=40523, maxDocs=44218)
                  0.046875 = fieldNorm(doc=5699)
          0.33333334 = coord(1/3)
      0.5 = coord(1/2)
    
    Source
    Information processing and management. 31(1995) no.3, S.315-326