Search (44 results, page 1 of 3)

  • × theme_ss:"Retrievalalgorithmen"
  1. Berry, M.W.; Browne, M.: Understanding search engines : mathematical modeling and text retrieval (1999) 0.17
    0.1692617 = sum of:
      0.119178906 = product of:
        0.47671562 = sum of:
          0.47671562 = weight(_text_:b47 in 5777) [ClassicSimilarity], result of:
            0.47671562 = score(doc=5777,freq=4.0), product of:
              0.47979188 = queryWeight, product of:
                10.598275 = idf(docFreq=2, maxDocs=44218)
                0.045270752 = queryNorm
              0.9935883 = fieldWeight in 5777, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                10.598275 = idf(docFreq=2, maxDocs=44218)
                0.046875 = fieldNorm(doc=5777)
        0.25 = coord(1/4)
      0.050082788 = product of:
        0.100165576 = sum of:
          0.100165576 = weight(_text_:1999 in 5777) [ClassicSimilarity], result of:
            0.100165576 = score(doc=5777,freq=7.0), product of:
              0.19121543 = queryWeight, product of:
                4.2238183 = idf(docFreq=1759, maxDocs=44218)
                0.045270752 = queryNorm
              0.52383626 = fieldWeight in 5777, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                4.2238183 = idf(docFreq=1759, maxDocs=44218)
                0.046875 = fieldNorm(doc=5777)
        0.5 = coord(1/2)
    
    Classification
    TK5105.884.B47 1999
    LCC
    TK5105.884.B47 1999
    Year
    1999
  2. Ciocca, G.; Schettini, R.: ¬A relevance feedback mechanism for content-based image retrieval (1999) 0.05
    0.049382288 = product of:
      0.098764576 = sum of:
        0.098764576 = product of:
          0.19752915 = sum of:
            0.19752915 = weight(_text_:1999 in 6498) [ClassicSimilarity], result of:
              0.19752915 = score(doc=6498,freq=5.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                1.033019 = fieldWeight in 6498, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.109375 = fieldNorm(doc=6498)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Information processing and management. 35(1999) no.5, S.605-632
    Year
    1999
  3. Finding anything in the billion page Web : are algorithms the key? (1999) 0.05
    0.049382288 = product of:
      0.098764576 = sum of:
        0.098764576 = product of:
          0.19752915 = sum of:
            0.19752915 = weight(_text_:1999 in 6248) [ClassicSimilarity], result of:
              0.19752915 = score(doc=6248,freq=5.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                1.033019 = fieldWeight in 6248, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.109375 = fieldNorm(doc=6248)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Computer networks. 31(1999) no.11-16, S.1760-1761
    Year
    1999
  4. Jones, K.: Linguistic searching versus relevance ranking : DR-LINK and TARGET (1999) 0.05
    0.049382288 = product of:
      0.098764576 = sum of:
        0.098764576 = product of:
          0.19752915 = sum of:
            0.19752915 = weight(_text_:1999 in 6423) [ClassicSimilarity], result of:
              0.19752915 = score(doc=6423,freq=5.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                1.033019 = fieldWeight in 6423, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.109375 = fieldNorm(doc=6423)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Online and CD-ROM review. 23(1999) no.2, S.67-80
    Year
    1999
  5. Berry, M.W.; Browne, M.: Understanding search engines : mathematical modeling and text retrieval (2005) 0.04
    0.0397263 = product of:
      0.0794526 = sum of:
        0.0794526 = product of:
          0.3178104 = sum of:
            0.3178104 = weight(_text_:b47 in 7) [ClassicSimilarity], result of:
              0.3178104 = score(doc=7,freq=4.0), product of:
                0.47979188 = queryWeight, product of:
                  10.598275 = idf(docFreq=2, maxDocs=44218)
                  0.045270752 = queryNorm
                0.6623922 = fieldWeight in 7, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  10.598275 = idf(docFreq=2, maxDocs=44218)
                  0.03125 = fieldNorm(doc=7)
          0.25 = coord(1/4)
      0.5 = coord(1/2)
    
    Classification
    TK5105.884.B47 2005
    LCC
    TK5105.884.B47 2005
  6. Courtois, M.P.; Berry, M.W.: Results ranking in Web search engines (1999) 0.04
    0.035273064 = product of:
      0.07054613 = sum of:
        0.07054613 = product of:
          0.14109226 = sum of:
            0.14109226 = weight(_text_:1999 in 3726) [ClassicSimilarity], result of:
              0.14109226 = score(doc=3726,freq=5.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                0.7378707 = fieldWeight in 3726, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.078125 = fieldNorm(doc=3726)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Online. 23(1999) no.3, S.39-46
    Year
    1999
  7. Ruthven, I.; Lalmas, M.: Selective relevance feedback using term characteristics (1999) 0.04
    0.035273064 = product of:
      0.07054613 = sum of:
        0.07054613 = product of:
          0.14109226 = sum of:
            0.14109226 = weight(_text_:1999 in 3824) [ClassicSimilarity], result of:
              0.14109226 = score(doc=3824,freq=5.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                0.7378707 = fieldWeight in 3824, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.078125 = fieldNorm(doc=3824)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Vocabulary as a central concept in digital libraries: interdisciplinary concepts, challenges, and opportunities : proceedings of the Third International Conference an Conceptions of Library and Information Science (COLIS3), Dubrovnik, Croatia, 23-26 May 1999. Ed. by T. Arpanac et al
    Year
    1999
  8. Chakrabarti, S.; Dom, B.; Kumar, S.R.; Raghavan, P.; Rajagopalan, S.; Tomkins, A.; Kleinberg, J.M.; Gibson, D.: Neue Pfade durch den Internet-Dschungel : Die zweite Generation von Web-Suchmaschinen (1999) 0.03
    0.028218452 = product of:
      0.056436904 = sum of:
        0.056436904 = product of:
          0.11287381 = sum of:
            0.11287381 = weight(_text_:1999 in 3) [ClassicSimilarity], result of:
              0.11287381 = score(doc=3,freq=5.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                0.59029657 = fieldWeight in 3, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Spektrum der Wissenschaft. 1999, H.8, S.44-49
    Year
    1999
  9. Khoo, C.S.G.; Wan, K.-W.: ¬A simple relevancy-ranking strategy for an interface to Boolean OPACs (2004) 0.03
    0.026349783 = product of:
      0.052699566 = sum of:
        0.052699566 = sum of:
          0.031232102 = weight(_text_:1999 in 2509) [ClassicSimilarity], result of:
            0.031232102 = score(doc=2509,freq=2.0), product of:
              0.19121543 = queryWeight, product of:
                4.2238183 = idf(docFreq=1759, maxDocs=44218)
                0.045270752 = queryNorm
              0.16333464 = fieldWeight in 2509, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.2238183 = idf(docFreq=1759, maxDocs=44218)
                0.02734375 = fieldNorm(doc=2509)
          0.021467466 = weight(_text_:22 in 2509) [ClassicSimilarity], result of:
            0.021467466 = score(doc=2509,freq=2.0), product of:
              0.15853046 = queryWeight, product of:
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.045270752 = queryNorm
              0.1354154 = fieldWeight in 2509, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5018296 = idf(docFreq=3622, maxDocs=44218)
                0.02734375 = fieldNorm(doc=2509)
      0.5 = coord(1/2)
    
    Content
    "Most Web search engines accept natural language queries, perform some kind of fuzzy matching and produce ranked output, displaying first the documents that are most likely to be relevant. On the other hand, most library online public access catalogs (OPACs) an the Web are still Boolean retrieval systems that perform exact matching, and require users to express their search requests precisely in a Boolean search language and to refine their search statements to improve the search results. It is well-documented that users have difficulty searching Boolean OPACs effectively (e.g. Borgman, 1996; Ensor, 1992; Wallace, 1993). One approach to making OPACs easier to use is to develop a natural language search interface that acts as a middleware between the user's Web browser and the OPAC system. The search interface can accept a natural language query from the user and reformulate it as a series of Boolean search statements that are then submitted to the OPAC. The records retrieved by the OPAC are ranked by the search interface before forwarding them to the user's Web browser. The user, then, does not need to interact directly with the Boolean OPAC but with the natural language search interface or search intermediary. The search interface interacts with the OPAC system an the user's behalf. The advantage of this approach is that no modification to the OPAC or library system is required. Furthermore, the search interface can access multiple OPACs, acting as a meta search engine, and integrate search results from various OPACs before sending them to the user. The search interface needs to incorporate a method for converting the user's natural language query into a series of Boolean search statements, and for ranking the OPAC records retrieved. The purpose of this study was to develop a relevancyranking algorithm for a search interface to Boolean OPAC systems. This is part of an on-going effort to develop a knowledge-based search interface to OPACs called the E-Referencer (Khoo et al., 1998, 1999; Poo et al., 2000). E-Referencer v. 2 that has been implemented applies a repertoire of initial search strategies and reformulation strategies to retrieve records from OPACs using the Z39.50 protocol, and also assists users in mapping query keywords to the Library of Congress subject headings."
    Source
    Electronic library. 22(2004) no.2, S.112-120
  10. Davis, C.H.; McKim, G.W.: Systematic weighting and ranking : cutting the Gordian knot (1999) 0.02
    0.024691144 = product of:
      0.049382288 = sum of:
        0.049382288 = product of:
          0.098764576 = sum of:
            0.098764576 = weight(_text_:1999 in 3548) [ClassicSimilarity], result of:
              0.098764576 = score(doc=3548,freq=5.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                0.5165095 = fieldWeight in 3548, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=3548)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science. 50(1999) no.7, S.626-628
    Year
    1999
  11. Voorhees, E.M.: Implementing agglomerative hierarchic clustering algorithms for use in document retrieval (1986) 0.02
    0.024534248 = product of:
      0.049068496 = sum of:
        0.049068496 = product of:
          0.09813699 = sum of:
            0.09813699 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
              0.09813699 = score(doc=402,freq=2.0), product of:
                0.15853046 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045270752 = 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)
      0.5 = coord(1/2)
    
    Source
    Information processing and management. 22(1986) no.6, S.465-476
  12. Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983) 0.02
    0.021467466 = product of:
      0.04293493 = sum of:
        0.04293493 = product of:
          0.08586986 = sum of:
            0.08586986 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
              0.08586986 = score(doc=2134,freq=2.0), product of:
                0.15853046 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045270752 = 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)
      0.5 = coord(1/2)
    
    Date
    30. 3.2001 13:32:22
  13. Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000) 0.02
    0.021467466 = product of:
      0.04293493 = sum of:
        0.04293493 = product of:
          0.08586986 = sum of:
            0.08586986 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
              0.08586986 = score(doc=3445,freq=2.0), product of:
                0.15853046 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045270752 = 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)
      0.5 = coord(1/2)
    
    Date
    25. 8.2005 17:42:22
  14. Martin-Bautista, M.J.; Vila, M.-A.; Larsen, H.L.: ¬A fuzzy genetic algorithm approach to an adaptive information retrieval agent (1999) 0.02
    0.02116384 = product of:
      0.04232768 = sum of:
        0.04232768 = product of:
          0.08465536 = sum of:
            0.08465536 = weight(_text_:1999 in 3914) [ClassicSimilarity], result of:
              0.08465536 = score(doc=3914,freq=5.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                0.44272244 = fieldWeight in 3914, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.046875 = fieldNorm(doc=3914)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science. 50(1999) no.9, S.760-771
    Year
    1999
  15. Fuhr, N.: Ranking-Experimente mit gewichteter Indexierung (1986) 0.02
    0.018400686 = product of:
      0.03680137 = sum of:
        0.03680137 = product of:
          0.07360274 = sum of:
            0.07360274 = weight(_text_:22 in 58) [ClassicSimilarity], result of:
              0.07360274 = score(doc=58,freq=2.0), product of:
                0.15853046 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045270752 = queryNorm
                0.46428138 = fieldWeight in 58, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.09375 = fieldNorm(doc=58)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    14. 6.2015 22:12:44
  16. Fuhr, N.: Rankingexperimente mit gewichteter Indexierung (1986) 0.02
    0.018400686 = product of:
      0.03680137 = sum of:
        0.03680137 = product of:
          0.07360274 = sum of:
            0.07360274 = weight(_text_:22 in 2051) [ClassicSimilarity], result of:
              0.07360274 = score(doc=2051,freq=2.0), product of:
                0.15853046 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045270752 = queryNorm
                0.46428138 = fieldWeight in 2051, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.09375 = fieldNorm(doc=2051)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    14. 6.2015 22:12:56
  17. Abu-Salem, H.; Al-Omari, M.; Evens, M.W.: Stemming methodologies over individual query words for an Arabic information retrieval system (1999) 0.02
    0.017636532 = product of:
      0.035273064 = sum of:
        0.035273064 = product of:
          0.07054613 = sum of:
            0.07054613 = weight(_text_:1999 in 3672) [ClassicSimilarity], result of:
              0.07054613 = score(doc=3672,freq=5.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                0.36893535 = fieldWeight in 3672, product of:
                  2.236068 = tf(freq=5.0), with freq of:
                    5.0 = termFreq=5.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=3672)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Journal of the American Society for Information Science. 50(1999) no.6, S.524-529
    Year
    1999
  18. Schamber, L.; Bateman, J.: Relevance criteria uses and importance : progress in development of a measurement scale (1999) 0.02
    0.016393438 = product of:
      0.032786876 = sum of:
        0.032786876 = product of:
          0.06557375 = sum of:
            0.06557375 = weight(_text_:1999 in 6691) [ClassicSimilarity], result of:
              0.06557375 = score(doc=6691,freq=3.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                0.3429313 = fieldWeight in 6691, product of:
                  1.7320508 = tf(freq=3.0), with freq of:
                    3.0 = termFreq=3.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.046875 = fieldNorm(doc=6691)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Year
    1999
  19. Kantor, P.; Kim, M.H.; Ibraev, U.; Atasoy, K.: Estimating the number of relevant documents in enormous collections (1999) 0.01
    0.013661198 = product of:
      0.027322397 = sum of:
        0.027322397 = product of:
          0.054644793 = sum of:
            0.054644793 = weight(_text_:1999 in 6690) [ClassicSimilarity], result of:
              0.054644793 = score(doc=6690,freq=3.0), product of:
                0.19121543 = queryWeight, product of:
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.045270752 = queryNorm
                0.28577608 = fieldWeight in 6690, product of:
                  1.7320508 = tf(freq=3.0), with freq of:
                    3.0 = termFreq=3.0
                  4.2238183 = idf(docFreq=1759, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=6690)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Year
    1999
  20. MacFarlane, A.; Robertson, S.E.; McCann, J.A.: Parallel computing for passage retrieval (2004) 0.01
    0.012267124 = product of:
      0.024534248 = sum of:
        0.024534248 = product of:
          0.049068496 = sum of:
            0.049068496 = weight(_text_:22 in 5108) [ClassicSimilarity], result of:
              0.049068496 = score(doc=5108,freq=2.0), product of:
                0.15853046 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045270752 = queryNorm
                0.30952093 = fieldWeight in 5108, 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=5108)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    20. 1.2007 18:30:22

Years

Languages

  • e 38
  • d 6

Types

  • a 39
  • m 4
  • r 1
  • s 1
  • More… Less…