Document (#6625)

Author
Fuhr, N.
Title
Zur Überwindung der Diskrepanz zwischen Retrievalforschung und -praxis
Source
Nachrichten für Dokumentation. 41(1990), S.3-7
Year
1990
Abstract
In diesem Beitrag werden einige Forschungsergebnisse des Information Retrieval vorgestellt, die unmittelbar zur Verbesserung der Retrievalqualität für bereits existierende Datenbanken eingesetzt werden können: Linguistische Algorithmen zur Grund- und Stammformreduktion unterstützen die Suche nach Flexions- und Derivationsformen von Suchtermen. Rankingalgorithmen, die Frage- und Dokumentterme gewichten, führen zu signifikant besseren Retrievalergebnissen als beim Booleschen Retrieval. Durch Relevance Feedback können die Retrievalqualität weiter gesteigert und außerdem der Benutzer bei der sukzessiven Modifikation seiner Frageformulierung unterstützt werden. Es wird eine benutzerfreundliche Bedienungsoberfläche für ein System vorgestellt, das auf diesen Konzepten basiert.
Theme
Retrievalalgorithmen

Similar documents (author)

  1. Fuhr, N.: Ranking-Experimente mit gewichteter Indexierung (1986) 5.19 
    5.187669 = sum of:
  5.187669 = weight(author_txt:fuhr in 58) [ClassicSimilarity], result of:
    5.187669 = fieldWeight in 58, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      8.30027 = idf(docFreq=29, maxDocs=44421)
      0.625 = fieldNorm(doc=58)
  2. Fuhr, N.: Hypertext und Information-Retrieval (1990) 5.19 
    5.187669 = sum of:
  5.187669 = weight(author_txt:fuhr in 4472) [ClassicSimilarity], result of:
    5.187669 = fieldWeight in 4472, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      8.30027 = idf(docFreq=29, maxDocs=44421)
      0.625 = fieldNorm(doc=4472)
  3. Fuhr, N.: Konzepte zur Gestaltung zukünftiger Information-Retrieval-Systeme (1992) 5.19 
    5.187669 = sum of:
  5.187669 = weight(author_txt:fuhr in 7856) [ClassicSimilarity], result of:
    5.187669 = fieldWeight in 7856, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      8.30027 = idf(docFreq=29, maxDocs=44421)
      0.625 = fieldNorm(doc=7856)
  4. Fuhr, N.: Repräsentationen und Anfragefunktionalität in multimedialen Informationssystemen (1990) 5.19 
    5.187669 = sum of:
  5.187669 = weight(author_txt:fuhr in 49) [ClassicSimilarity], result of:
    5.187669 = fieldWeight in 49, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      8.30027 = idf(docFreq=29, maxDocs=44421)
      0.625 = fieldNorm(doc=49)
  5. Fuhr, N.: von theoretischen Konzepten zur praktischen Anwendung : Hypertext und Information Retrieval (1990) 5.19 
    5.187669 = sum of:
  5.187669 = weight(author_txt:fuhr in 172) [ClassicSimilarity], result of:
    5.187669 = fieldWeight in 172, product of:
      1.0 = tf(freq=1.0), with freq of:
        1.0 = termFreq=1.0
      8.30027 = idf(docFreq=29, maxDocs=44421)
      0.625 = fieldNorm(doc=172)

Similar documents (content)

  1. Hoffmann, R.: Entwicklung einer benutzerunterstützten automatisierten Klassifikation von Web - Dokumenten : Untersuchung gegenwärtiger Methoden zur automatisierten Dokumentklassifikation und Implementierung eines Prototyps zum verbesserten Information Retrieval für das xFIND System (2002) 0.12 
    0.11832432 = sum of:
  0.11832432 = product of:
    0.3697635 = sum of:
      0.03735087 = weight(abstract_txt:unterstützen in 5197) [ClassicSimilarity], result of:
        0.03735087 = score(doc=5197,freq=1.0), product of:
          0.119444616 = queryWeight, product of:
            6.6710296 = idf(docFreq=152, maxDocs=44421)
            0.017904975 = queryNorm
          0.3127045 = fieldWeight in 5197, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.6710296 = idf(docFreq=152, maxDocs=44421)
            0.046875 = fieldNorm(doc=5197)
      0.07281629 = weight(abstract_txt:verbesserung in 5197) [ClassicSimilarity], result of:
        0.07281629 = score(doc=5197,freq=3.0), product of:
          0.1292443 = queryWeight, product of:
            1.0402133 = boost
            6.939294 = idf(docFreq=116, maxDocs=44421)
            0.017904975 = queryNorm
          0.5634004 = fieldWeight in 5197, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            6.939294 = idf(docFreq=116, maxDocs=44421)
            0.046875 = fieldNorm(doc=5197)
      0.0105725285 = weight(abstract_txt:retrieval in 5197) [ClassicSimilarity], result of:
        0.0105725285 = score(doc=5197,freq=1.0), product of:
          0.06487768 = queryWeight, product of:
            1.0422679 = boost
            3.4765 = idf(docFreq=3732, maxDocs=44421)
            0.017904975 = queryNorm
          0.16296095 = fieldWeight in 5197, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.4765 = idf(docFreq=3732, maxDocs=44421)
            0.046875 = fieldNorm(doc=5197)
      0.04721058 = weight(abstract_txt:algorithmen in 5197) [ClassicSimilarity], result of:
        0.04721058 = score(doc=5197,freq=1.0), product of:
          0.13963437 = queryWeight, product of:
            1.081217 = boost
            7.212831 = idf(docFreq=88, maxDocs=44421)
            0.017904975 = queryNorm
          0.33810145 = fieldWeight in 5197, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.212831 = idf(docFreq=88, maxDocs=44421)
            0.046875 = fieldNorm(doc=5197)
      0.077904545 = weight(abstract_txt:existierende in 5197) [ClassicSimilarity], result of:
        0.077904545 = score(doc=5197,freq=1.0), product of:
          0.19498803 = queryWeight, product of:
            1.2776759 = boost
            8.523414 = idf(docFreq=23, maxDocs=44421)
            0.017904975 = queryNorm
          0.399535 = fieldWeight in 5197, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.523414 = idf(docFreq=23, maxDocs=44421)
            0.046875 = fieldNorm(doc=5197)
      0.022154042 = weight(abstract_txt:können in 5197) [ClassicSimilarity], result of:
        0.022154042 = score(doc=5197,freq=1.0), product of:
          0.10623756 = queryWeight, product of:
            1.3337387 = boost
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.017904975 = queryNorm
          0.20853305 = fieldWeight in 5197, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.046875 = fieldNorm(doc=5197)
      0.043101612 = weight(abstract_txt:werden in 5197) [ClassicSimilarity], result of:
        0.043101612 = score(doc=5197,freq=7.0), product of:
          0.099076234 = queryWeight, product of:
            1.5774735 = boost
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.017904975 = queryNorm
          0.4350348 = fieldWeight in 5197, product of:
            2.6457512 = tf(freq=7.0), with freq of:
              7.0 = termFreq=7.0
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.046875 = fieldNorm(doc=5197)
      0.058653027 = weight(abstract_txt:vorgestellt in 5197) [ClassicSimilarity], result of:
        0.058653027 = score(doc=5197,freq=2.0), product of:
          0.16137134 = queryWeight, product of:
            1.6437845 = boost
            5.4828677 = idf(docFreq=501, maxDocs=44421)
            0.017904975 = queryNorm
          0.3634662 = fieldWeight in 5197, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.4828677 = idf(docFreq=501, maxDocs=44421)
            0.046875 = fieldNorm(doc=5197)
    0.32 = coord(8/25)
  2. Mandl, T.; Womser-Hacker, C.: ¬Ein adaptives Information-Retrieval-Modell für Digitale Bibliotheken (2000) 0.10 
    0.10162756 = sum of:
  0.10162756 = product of:
    0.63517225 = sum of:
      0.029903624 = weight(abstract_txt:retrieval in 6481) [ClassicSimilarity], result of:
        0.029903624 = score(doc=6481,freq=2.0), product of:
          0.06487768 = queryWeight, product of:
            1.0422679 = boost
            3.4765 = idf(docFreq=3732, maxDocs=44421)
            0.017904975 = queryNorm
          0.46092314 = fieldWeight in 6481, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.4765 = idf(docFreq=3732, maxDocs=44421)
            0.09375 = fieldNorm(doc=6481)
      0.032581754 = weight(abstract_txt:werden in 6481) [ClassicSimilarity], result of:
        0.032581754 = score(doc=6481,freq=1.0), product of:
          0.099076234 = queryWeight, product of:
            1.5774735 = boost
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.017904975 = queryNorm
          0.3288554 = fieldWeight in 6481, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.09375 = fieldNorm(doc=6481)
      0.0829479 = weight(abstract_txt:vorgestellt in 6481) [ClassicSimilarity], result of:
        0.0829479 = score(doc=6481,freq=1.0), product of:
          0.16137134 = queryWeight, product of:
            1.6437845 = boost
            5.4828677 = idf(docFreq=501, maxDocs=44421)
            0.017904975 = queryNorm
          0.51401883 = fieldWeight in 6481, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.4828677 = idf(docFreq=501, maxDocs=44421)
            0.09375 = fieldNorm(doc=6481)
      0.48973897 = weight(abstract_txt:retrievalqualität in 6481) [ClassicSimilarity], result of:
        0.48973897 = score(doc=6481,freq=1.0), product of:
          0.52714795 = queryWeight, product of:
            2.970968 = boost
            9.909708 = idf(docFreq=5, maxDocs=44421)
            0.017904975 = queryNorm
          0.9290351 = fieldWeight in 6481, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.909708 = idf(docFreq=5, maxDocs=44421)
            0.09375 = fieldNorm(doc=6481)
    0.16 = coord(4/25)
  3. Fuhr, N.: Theorie des Information Retrieval I : Modelle (2004) 0.09 
    0.09038772 = sum of:
  0.09038772 = product of:
    0.45193857 = sum of:
      0.01993575 = weight(abstract_txt:retrieval in 3912) [ClassicSimilarity], result of:
        0.01993575 = score(doc=3912,freq=2.0), product of:
          0.06487768 = queryWeight, product of:
            1.0422679 = boost
            3.4765 = idf(docFreq=3732, maxDocs=44421)
            0.017904975 = queryNorm
          0.3072821 = fieldWeight in 3912, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.4765 = idf(docFreq=3732, maxDocs=44421)
            0.0625 = fieldNorm(doc=3912)
      0.041774064 = weight(abstract_txt:können in 3912) [ClassicSimilarity], result of:
        0.041774064 = score(doc=3912,freq=2.0), product of:
          0.10623756 = queryWeight, product of:
            1.3337387 = boost
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.017904975 = queryNorm
          0.3932137 = fieldWeight in 3912, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.0625 = fieldNorm(doc=3912)
      0.19104034 = weight(abstract_txt:booleschen in 3912) [ClassicSimilarity], result of:
        0.19104034 = score(doc=3912,freq=2.0), product of:
          0.23231664 = queryWeight, product of:
            1.3946232 = boost
            9.303573 = idf(docFreq=10, maxDocs=44421)
            0.017904975 = queryNorm
          0.8223274 = fieldWeight in 3912, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            9.303573 = idf(docFreq=10, maxDocs=44421)
            0.0625 = fieldNorm(doc=3912)
      0.15574607 = weight(abstract_txt:gewichten in 3912) [ClassicSimilarity], result of:
        0.15574607 = score(doc=3912,freq=1.0), product of:
          0.2554377 = queryWeight, product of:
            1.4623765 = boost
            9.755557 = idf(docFreq=6, maxDocs=44421)
            0.017904975 = queryNorm
          0.6097223 = fieldWeight in 3912, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.755557 = idf(docFreq=6, maxDocs=44421)
            0.0625 = fieldNorm(doc=3912)
      0.043442342 = weight(abstract_txt:werden in 3912) [ClassicSimilarity], result of:
        0.043442342 = score(doc=3912,freq=4.0), product of:
          0.099076234 = queryWeight, product of:
            1.5774735 = boost
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.017904975 = queryNorm
          0.43847388 = fieldWeight in 3912, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.0625 = fieldNorm(doc=3912)
    0.2 = coord(5/25)
  4. Ramm, T.: ¬Der Computer ersetzt den Lesesaal : Die Wissenschaftspublikation im digitalen Zeitalter - Verleger und Bibliothekare müssen künftig Informationsvermeidung betreiben (2001) 0.08 
    0.08112005 = sum of:
  0.08112005 = product of:
    0.28971446 = sum of:
      0.03618356 = weight(abstract_txt:außerdem in 6634) [ClassicSimilarity], result of:
        0.03618356 = score(doc=6634,freq=2.0), product of:
          0.121625446 = queryWeight, product of:
            1.0090878 = boost
            6.731654 = idf(docFreq=143, maxDocs=44421)
            0.017904975 = queryNorm
          0.2974999 = fieldWeight in 6634, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            6.731654 = idf(docFreq=143, maxDocs=44421)
            0.03125 = fieldNorm(doc=6634)
      0.025990712 = weight(abstract_txt:grund in 6634) [ClassicSimilarity], result of:
        0.025990712 = score(doc=6634,freq=1.0), product of:
          0.122905806 = queryWeight, product of:
            1.0143852 = boost
            6.7669935 = idf(docFreq=138, maxDocs=44421)
            0.017904975 = queryNorm
          0.21146855 = fieldWeight in 6634, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.7669935 = idf(docFreq=138, maxDocs=44421)
            0.03125 = fieldNorm(doc=6634)
      0.039641522 = weight(abstract_txt:forschungsergebnisse in 6634) [ClassicSimilarity], result of:
        0.039641522 = score(doc=6634,freq=1.0), product of:
          0.16285227 = queryWeight, product of:
            1.1676525 = boost
            7.7894444 = idf(docFreq=49, maxDocs=44421)
            0.017904975 = queryNorm
          0.24342014 = fieldWeight in 6634, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.7894444 = idf(docFreq=49, maxDocs=44421)
            0.03125 = fieldNorm(doc=6634)
      0.044418603 = weight(abstract_txt:unmittelbar in 6634) [ClassicSimilarity], result of:
        0.044418603 = score(doc=6634,freq=1.0), product of:
          0.17568588 = queryWeight, product of:
            1.2127887 = boost
            8.090549 = idf(docFreq=36, maxDocs=44421)
            0.017904975 = queryNorm
          0.25282967 = fieldWeight in 6634, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.090549 = idf(docFreq=36, maxDocs=44421)
            0.03125 = fieldNorm(doc=6634)
      0.0330253 = weight(abstract_txt:können in 6634) [ClassicSimilarity], result of:
        0.0330253 = score(doc=6634,freq=5.0), product of:
          0.10623756 = queryWeight, product of:
            1.3337387 = boost
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.017904975 = queryNorm
          0.31086272 = fieldWeight in 6634, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.03125 = fieldNorm(doc=6634)
      0.077873036 = weight(abstract_txt:gewichten in 6634) [ClassicSimilarity], result of:
        0.077873036 = score(doc=6634,freq=1.0), product of:
          0.2554377 = queryWeight, product of:
            1.4623765 = boost
            9.755557 = idf(docFreq=6, maxDocs=44421)
            0.017904975 = queryNorm
          0.30486116 = fieldWeight in 6634, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.755557 = idf(docFreq=6, maxDocs=44421)
            0.03125 = fieldNorm(doc=6634)
      0.032581754 = weight(abstract_txt:werden in 6634) [ClassicSimilarity], result of:
        0.032581754 = score(doc=6634,freq=9.0), product of:
          0.099076234 = queryWeight, product of:
            1.5774735 = boost
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.017904975 = queryNorm
          0.3288554 = fieldWeight in 6634, product of:
            3.0 = tf(freq=9.0), with freq of:
              9.0 = termFreq=9.0
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.03125 = fieldNorm(doc=6634)
    0.28 = coord(7/25)
  5. Ruge, G.; Goeser, S.: Information Retrieval ohne Linguistik (1998) 0.08 
    0.078199975 = sum of:
  0.078199975 = product of:
    0.39099988 = sum of:
      0.01762088 = weight(abstract_txt:retrieval in 3528) [ClassicSimilarity], result of:
        0.01762088 = score(doc=3528,freq=1.0), product of:
          0.06487768 = queryWeight, product of:
            1.0422679 = boost
            3.4765 = idf(docFreq=3732, maxDocs=44421)
            0.017904975 = queryNorm
          0.27160156 = fieldWeight in 3528, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.4765 = idf(docFreq=3732, maxDocs=44421)
            0.078125 = fieldNorm(doc=3528)
      0.09834989 = weight(abstract_txt:besseren in 3528) [ClassicSimilarity], result of:
        0.09834989 = score(doc=3528,freq=1.0), product of:
          0.1620253 = queryWeight, product of:
            1.164684 = boost
            7.769642 = idf(docFreq=50, maxDocs=44421)
            0.017904975 = queryNorm
          0.6070033 = fieldWeight in 3528, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.769642 = idf(docFreq=50, maxDocs=44421)
            0.078125 = fieldNorm(doc=3528)
      0.19566008 = weight(abstract_txt:linguistische in 3528) [ClassicSimilarity], result of:
        0.19566008 = score(doc=3528,freq=2.0), product of:
          0.20341912 = queryWeight, product of:
            1.3050063 = boost
            8.705735 = idf(docFreq=19, maxDocs=44421)
            0.017904975 = queryNorm
          0.9618569 = fieldWeight in 3528, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            8.705735 = idf(docFreq=19, maxDocs=44421)
            0.078125 = fieldNorm(doc=3528)
      0.05221758 = weight(abstract_txt:können in 3528) [ClassicSimilarity], result of:
        0.05221758 = score(doc=3528,freq=2.0), product of:
          0.10623756 = queryWeight, product of:
            1.3337387 = boost
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.017904975 = queryNorm
          0.49151713 = fieldWeight in 3528, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.448705 = idf(docFreq=1411, maxDocs=44421)
            0.078125 = fieldNorm(doc=3528)
      0.027151464 = weight(abstract_txt:werden in 3528) [ClassicSimilarity], result of:
        0.027151464 = score(doc=3528,freq=1.0), product of:
          0.099076234 = queryWeight, product of:
            1.5774735 = boost
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.017904975 = queryNorm
          0.27404618 = fieldWeight in 3528, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.507791 = idf(docFreq=3617, maxDocs=44421)
            0.078125 = fieldNorm(doc=3528)
    0.2 = coord(5/25)