Search (78 results, page 1 of 4)

  • × theme_ss:"Retrievalalgorithmen"
  1. Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983) 0.04
    0.04084256 = product of:
      0.10210639 = sum of:
        0.06495923 = weight(_text_:u in 2134) [ClassicSimilarity], result of:
          0.06495923 = score(doc=2134,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.50648975 = fieldWeight in 2134, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.109375 = fieldNorm(doc=2134)
        0.037147168 = product of:
          0.074294336 = sum of:
            0.074294336 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
              0.074294336 = score(doc=2134,freq=2.0), product of:
                0.13716005 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03916811 = queryNorm
                0.5416616 = fieldWeight in 2134, 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=2134)
          0.5 = coord(1/2)
      0.4 = coord(2/5)
    
    Date
    30. 3.2001 13:32:22
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  2. Drucker, H.; Shahrary, B.; Gibbon, D.C.: Support vector machines : relevance feedback and information retrieval (2002) 0.03
    0.027786314 = product of:
      0.13893157 = sum of:
        0.13893157 = weight(_text_:d.c in 2581) [ClassicSimilarity], result of:
          0.13893157 = score(doc=2581,freq=2.0), product of:
            0.28650925 = queryWeight, product of:
              7.314861 = idf(docFreq=79, maxDocs=44218)
              0.03916811 = queryNorm
            0.48491132 = fieldWeight in 2581, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              7.314861 = idf(docFreq=79, maxDocs=44218)
              0.046875 = fieldNorm(doc=2581)
      0.2 = coord(1/5)
    
  3. Faloutsos, C.: Signature files (1992) 0.02
    0.023338607 = product of:
      0.058346514 = sum of:
        0.03711956 = weight(_text_:u in 3499) [ClassicSimilarity], result of:
          0.03711956 = score(doc=3499,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.28942272 = fieldWeight in 3499, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.0625 = fieldNorm(doc=3499)
        0.021226954 = product of:
          0.042453907 = sum of:
            0.042453907 = weight(_text_:22 in 3499) [ClassicSimilarity], result of:
              0.042453907 = score(doc=3499,freq=2.0), product of:
                0.13716005 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03916811 = queryNorm
                0.30952093 = fieldWeight in 3499, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3499)
          0.5 = coord(1/2)
      0.4 = coord(2/5)
    
    Date
    7. 5.1999 15:22:48
    Source
    Information retrieval: data structures and algorithms. Ed.: W.B. Frakes u. R. Baeza-Yates
  4. Klas, C.-P.; Fuhr, N.; Schaefer, A.: Evaluating strategic support for information access in the DAFFODIL system (2004) 0.02
    0.022116581 = product of:
      0.05529145 = sum of:
        0.039371237 = weight(_text_:u in 2419) [ClassicSimilarity], result of:
          0.039371237 = score(doc=2419,freq=4.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.30697915 = fieldWeight in 2419, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.046875 = fieldNorm(doc=2419)
        0.015920214 = product of:
          0.03184043 = sum of:
            0.03184043 = weight(_text_:22 in 2419) [ClassicSimilarity], result of:
              0.03184043 = score(doc=2419,freq=2.0), product of:
                0.13716005 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03916811 = queryNorm
                0.23214069 = fieldWeight in 2419, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2419)
          0.5 = coord(1/2)
      0.4 = coord(2/5)
    
    Date
    16.11.2008 16:22:48
    Source
    Research and advanced technology for digital libraries : 8th European conference, ECDL 2004, Bath, UK, September 12-17, 2004 : proceedings. Eds.: Heery, R. u. E. Lyon
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  5. Chang, C.-H.; Hsu, C.-C.: Integrating query expansion and conceptual relevance feedback for personalized Web information retrieval (1998) 0.02
    0.02042128 = product of:
      0.051053196 = sum of:
        0.032479614 = weight(_text_:u in 1319) [ClassicSimilarity], result of:
          0.032479614 = score(doc=1319,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.25324488 = fieldWeight in 1319, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1319)
        0.018573584 = product of:
          0.037147168 = sum of:
            0.037147168 = weight(_text_:22 in 1319) [ClassicSimilarity], result of:
              0.037147168 = score(doc=1319,freq=2.0), product of:
                0.13716005 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03916811 = queryNorm
                0.2708308 = fieldWeight in 1319, 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=1319)
          0.5 = coord(1/2)
      0.4 = coord(2/5)
    
    Date
    1. 8.1996 22:08:06
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  6. Keen, M.: Query reformulation in ranked output interaction (1994) 0.02
    0.01954908 = product of:
      0.097745396 = sum of:
        0.097745396 = product of:
          0.19549079 = sum of:
            0.19549079 = weight(_text_:rose in 1065) [ClassicSimilarity], result of:
              0.19549079 = score(doc=1065,freq=2.0), product of:
                0.31465015 = queryWeight, product of:
                  8.033325 = idf(docFreq=38, maxDocs=44218)
                  0.03916811 = queryNorm
                0.62129575 = fieldWeight in 1065, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  8.033325 = idf(docFreq=38, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1065)
          0.5 = coord(1/2)
      0.2 = coord(1/5)
    
    Abstract
    Reports on a research project to evaluate and compare Boolean searching and methods of query reformulation using ranked output retrieval. Illustrates the design and operating features of the ranked output system, called ROSE (Ranked Output Search Engine), by means of typical results obtained by searching a database of 1239 records on the subject of cystic fibrosis. Concludes that further work is needed to determine the best reformulation tactics needed to harness the professional searcher's intelligence with that much more limited intelligence provided by the search software
  7. Efthimiadis, E.N.: User choices : a new yardstick for the evaluation of ranking algorithms for interactive query expansion (1995) 0.01
    0.014586629 = product of:
      0.036466572 = sum of:
        0.023199726 = weight(_text_:u in 5697) [ClassicSimilarity], result of:
          0.023199726 = score(doc=5697,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.1808892 = fieldWeight in 5697, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5697)
        0.013266846 = product of:
          0.026533691 = sum of:
            0.026533691 = weight(_text_:22 in 5697) [ClassicSimilarity], result of:
              0.026533691 = score(doc=5697,freq=2.0), product of:
                0.13716005 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03916811 = queryNorm
                0.19345059 = fieldWeight in 5697, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=5697)
          0.5 = coord(1/2)
      0.4 = coord(2/5)
    
    Date
    22. 2.1996 13:14:10
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  8. Song, D.; Bruza, P.D.: Towards context sensitive information inference (2003) 0.01
    0.014586629 = product of:
      0.036466572 = sum of:
        0.023199726 = weight(_text_:u in 1428) [ClassicSimilarity], result of:
          0.023199726 = score(doc=1428,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.1808892 = fieldWeight in 1428, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.0390625 = fieldNorm(doc=1428)
        0.013266846 = product of:
          0.026533691 = sum of:
            0.026533691 = weight(_text_:22 in 1428) [ClassicSimilarity], result of:
              0.026533691 = score(doc=1428,freq=2.0), product of:
                0.13716005 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03916811 = queryNorm
                0.19345059 = fieldWeight in 1428, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=1428)
          0.5 = coord(1/2)
      0.4 = coord(2/5)
    
    Date
    22. 3.2003 19:35:46
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  9. Shiri, A.A.; Revie, C.: Query expansion behavior within a thesaurus-enhanced search environment : a user-centered evaluation (2006) 0.01
    0.014586629 = product of:
      0.036466572 = sum of:
        0.023199726 = weight(_text_:u in 56) [ClassicSimilarity], result of:
          0.023199726 = score(doc=56,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.1808892 = fieldWeight in 56, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.0390625 = fieldNorm(doc=56)
        0.013266846 = product of:
          0.026533691 = sum of:
            0.026533691 = weight(_text_:22 in 56) [ClassicSimilarity], result of:
              0.026533691 = score(doc=56,freq=2.0), product of:
                0.13716005 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03916811 = queryNorm
                0.19345059 = fieldWeight in 56, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=56)
          0.5 = coord(1/2)
      0.4 = coord(2/5)
    
    Date
    22. 7.2006 16:32:43
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  10. Robertson, S.E.: ¬The probability ranking principle in IR (1977) 0.01
    0.011135868 = product of:
      0.05567934 = sum of:
        0.05567934 = weight(_text_:u in 1935) [ClassicSimilarity], result of:
          0.05567934 = score(doc=1935,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.43413407 = fieldWeight in 1935, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.09375 = fieldNorm(doc=1935)
      0.2 = coord(1/5)
    
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willet. San Francisco: Morgan Kaufmann 1997. S.281-286.
  11. Salton, G.; Buckley, C.: Term-weighting approaches in automatic text retrieval (1988) 0.01
    0.011135868 = product of:
      0.05567934 = sum of:
        0.05567934 = weight(_text_:u in 1938) [ClassicSimilarity], result of:
          0.05567934 = score(doc=1938,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.43413407 = fieldWeight in 1938, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.09375 = fieldNorm(doc=1938)
      0.2 = coord(1/5)
    
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.323-328.
  12. Sparck Jones, K.: Search term relevance weighting given little relevance information (1979) 0.01
    0.011135868 = product of:
      0.05567934 = sum of:
        0.05567934 = weight(_text_:u in 1939) [ClassicSimilarity], result of:
          0.05567934 = score(doc=1939,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.43413407 = fieldWeight in 1939, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.09375 = fieldNorm(doc=1939)
      0.2 = coord(1/5)
    
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.329-338.
  13. Koopman, R.: ¬Ein OPAC mit Gewichtungsalgorithmen : Der PICA Micro OPC (1996) 0.01
    0.009279891 = product of:
      0.04639945 = sum of:
        0.04639945 = weight(_text_:u in 4114) [ClassicSimilarity], result of:
          0.04639945 = score(doc=4114,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.3617784 = fieldWeight in 4114, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.078125 = fieldNorm(doc=4114)
      0.2 = coord(1/5)
    
    Source
    Zukunft der Sacherschließung im OPAC: Vorträge des 2. Düsseldorfer OPAC-Kolloquiums am 21. Juni 1995. Hrsg.: E. Niggemann u. K. Lepsky
  14. Baeza-Yates, R.A.: Introduction to data structures and algorithms related to information retrieval (1992) 0.01
    0.009279891 = product of:
      0.04639945 = sum of:
        0.04639945 = weight(_text_:u in 3082) [ClassicSimilarity], result of:
          0.04639945 = score(doc=3082,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.3617784 = fieldWeight in 3082, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.078125 = fieldNorm(doc=3082)
      0.2 = coord(1/5)
    
    Source
    Information retrieval: data structures and algorithms. Ed.: W.B. Frakes u. R. Baeza-Yates
  15. Hüther, H.: Selix im DFG-Projekt Kascade (1998) 0.01
    0.009279891 = product of:
      0.04639945 = sum of:
        0.04639945 = weight(_text_:u in 5151) [ClassicSimilarity], result of:
          0.04639945 = score(doc=5151,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.3617784 = fieldWeight in 5151, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.078125 = fieldNorm(doc=5151)
      0.2 = coord(1/5)
    
    Source
    Knowledge Management und Kommunikationssysteme: Proceedings des 6. Internationalen Symposiums für Informationswissenschaft (ISI '98) Prag, 3.-7. November 1998 / Hochschulverband für Informationswissenschaft (HI) e.V. Konstanz ; Fachrichtung Informationswissenschaft der Universität des Saarlandes, Saarbrücken. Hrsg.: Harald H. Zimmermann u. Volker Schramm
  16. Fuhr, N.: Modelle im Information Retrieval (2013) 0.01
    0.009279891 = product of:
      0.04639945 = sum of:
        0.04639945 = weight(_text_:u in 724) [ClassicSimilarity], result of:
          0.04639945 = score(doc=724,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.3617784 = fieldWeight in 724, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.078125 = fieldNorm(doc=724)
      0.2 = coord(1/5)
    
    Source
    Grundlagen der praktischen Information und Dokumentation. Handbuch zur Einführung in die Informationswissenschaft und -praxis. 6., völlig neu gefaßte Ausgabe. Hrsg. von R. Kuhlen, W. Semar u. D. Strauch. Begründet von Klaus Laisiepen, Ernst Lutterbeck, Karl-Heinrich Meyer-Uhlenried
  17. Voorhees, E.M.: Implementing agglomerative hierarchic clustering algorithms for use in document retrieval (1986) 0.01
    0.008490781 = product of:
      0.042453907 = sum of:
        0.042453907 = product of:
          0.084907815 = sum of:
            0.084907815 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
              0.084907815 = score(doc=402,freq=2.0), product of:
                0.13716005 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03916811 = queryNorm
                0.61904186 = fieldWeight in 402, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.125 = fieldNorm(doc=402)
          0.5 = coord(1/2)
      0.2 = coord(1/5)
    
    Source
    Information processing and management. 22(1986) no.6, S.465-476
  18. Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000) 0.01
    0.0074294335 = product of:
      0.037147168 = sum of:
        0.037147168 = product of:
          0.074294336 = sum of:
            0.074294336 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
              0.074294336 = score(doc=3445,freq=2.0), product of:
                0.13716005 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03916811 = queryNorm
                0.5416616 = fieldWeight in 3445, 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=3445)
          0.5 = coord(1/2)
      0.2 = coord(1/5)
    
    Date
    25. 8.2005 17:42:22
  19. Srinivasan, P.: Query expansion and MEDLINE (1996) 0.01
    0.007423912 = product of:
      0.03711956 = sum of:
        0.03711956 = weight(_text_:u in 8453) [ClassicSimilarity], result of:
          0.03711956 = score(doc=8453,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.28942272 = fieldWeight in 8453, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.0625 = fieldNorm(doc=8453)
      0.2 = coord(1/5)
    
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  20. Pfeifer, U.; Pennekamp, S.: Incremental processing of vague queries in interactive retrieval systems (1997) 0.01
    0.007423912 = product of:
      0.03711956 = sum of:
        0.03711956 = weight(_text_:u in 735) [ClassicSimilarity], result of:
          0.03711956 = score(doc=735,freq=2.0), product of:
            0.12825379 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.03916811 = queryNorm
            0.28942272 = fieldWeight in 735, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.0625 = fieldNorm(doc=735)
      0.2 = coord(1/5)
    

Languages

  • e 66
  • d 11
  • m 1
  • More… Less…

Types

  • a 71
  • m 4
  • s 3
  • el 1
  • p 1
  • r 1
  • More… Less…