Search (25 results, page 1 of 2)

  • × theme_ss:"Retrievalalgorithmen"
  • × theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
  1. Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983) 0.02
    0.02181555 = product of:
      0.032723323 = sum of:
        0.0073404266 = weight(_text_:s in 2134) [ClassicSimilarity], result of:
          0.0073404266 = score(doc=2134,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.16817348 = fieldWeight in 2134, 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=2134)
        0.025382897 = product of:
          0.07614869 = sum of:
            0.07614869 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
              0.07614869 = score(doc=2134,freq=2.0), product of:
                0.1405835 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04014573 = 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)
          0.33333334 = coord(1/3)
      0.6666667 = coord(2/3)
    
    Date
    30. 3.2001 13:32:22
    Source
    Computer journal. 26(1983), S.239-246
  2. Chang, C.-H.; Hsu, C.-C.: Integrating query expansion and conceptual relevance feedback for personalized Web information retrieval (1998) 0.01
    0.010907775 = product of:
      0.016361661 = sum of:
        0.0036702133 = weight(_text_:s in 1319) [ClassicSimilarity], result of:
          0.0036702133 = score(doc=1319,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.08408674 = fieldWeight in 1319, 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=1319)
        0.012691448 = product of:
          0.038074344 = sum of:
            0.038074344 = weight(_text_:22 in 1319) [ClassicSimilarity], result of:
              0.038074344 = score(doc=1319,freq=2.0), product of:
                0.1405835 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04014573 = 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)
          0.33333334 = coord(1/3)
      0.6666667 = coord(2/3)
    
    Date
    1. 8.1996 22:08:06
    Source
    Computer networks and ISDN systems. 30(1998) nos.1/7, S.621-623
  3. Kwok, K.L.: ¬A network approach to probabilistic information retrieval (1995) 0.01
    0.009415352 = product of:
      0.014123027 = sum of:
        0.003145897 = weight(_text_:s in 5696) [ClassicSimilarity], result of:
          0.003145897 = score(doc=5696,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.072074346 = fieldWeight in 5696, 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=5696)
        0.01097713 = product of:
          0.03293139 = sum of:
            0.03293139 = weight(_text_:29 in 5696) [ClassicSimilarity], result of:
              0.03293139 = score(doc=5696,freq=2.0), product of:
                0.14122012 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.04014573 = queryNorm
                0.23319192 = fieldWeight in 5696, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.046875 = fieldNorm(doc=5696)
          0.33333334 = coord(1/3)
      0.6666667 = coord(2/3)
    
    Date
    29. 1.1996 18:42:14
    Source
    ACM transactions on information systems. 13(1995) no.3, S.324-353
  4. Klas, C.-P.; Fuhr, N.; Schaefer, A.: Evaluating strategic support for information access in the DAFFODIL system (2004) 0.01
    0.009349521 = product of:
      0.014024281 = sum of:
        0.003145897 = weight(_text_:s in 2419) [ClassicSimilarity], result of:
          0.003145897 = score(doc=2419,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.072074346 = fieldWeight in 2419, 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=2419)
        0.010878384 = product of:
          0.032635152 = sum of:
            0.032635152 = weight(_text_:22 in 2419) [ClassicSimilarity], result of:
              0.032635152 = score(doc=2419,freq=2.0), product of:
                0.1405835 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04014573 = 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)
          0.33333334 = coord(1/3)
      0.6666667 = coord(2/3)
    
    Date
    16.11.2008 16:22:48
    Pages
    S.476-487
  5. Calegari, S.; Sanchez, E.: Object-fuzzy concept network : an enrichment of ontologies in semantic information retrieval (2008) 0.01
    0.008570056 = product of:
      0.012855085 = sum of:
        0.0037074753 = weight(_text_:s in 2393) [ClassicSimilarity], result of:
          0.0037074753 = score(doc=2393,freq=4.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.08494043 = fieldWeight in 2393, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2393)
        0.00914761 = product of:
          0.027442828 = sum of:
            0.027442828 = weight(_text_:29 in 2393) [ClassicSimilarity], result of:
              0.027442828 = score(doc=2393,freq=2.0), product of:
                0.14122012 = queryWeight, product of:
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.04014573 = queryNorm
                0.19432661 = fieldWeight in 2393, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5176873 = idf(docFreq=3565, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=2393)
          0.33333334 = coord(1/3)
      0.6666667 = coord(2/3)
    
    Date
    9.11.2008 13:07:29
    Source
    Journal of the American Society for Information Science and Technology. 59(2008) no.13, S.2171-2185
  6. Efthimiadis, E.N.: User choices : a new yardstick for the evaluation of ranking algorithms for interactive query expansion (1995) 0.01
    0.0077912677 = product of:
      0.011686902 = sum of:
        0.002621581 = weight(_text_:s in 5697) [ClassicSimilarity], result of:
          0.002621581 = score(doc=5697,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.060061958 = fieldWeight in 5697, 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=5697)
        0.009065321 = product of:
          0.02719596 = sum of:
            0.02719596 = weight(_text_:22 in 5697) [ClassicSimilarity], result of:
              0.02719596 = score(doc=5697,freq=2.0), product of:
                0.1405835 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04014573 = 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)
          0.33333334 = coord(1/3)
      0.6666667 = coord(2/3)
    
    Date
    22. 2.1996 13:14:10
    Source
    Information processing and management. 31(1995) no.4, S.605-620
  7. Song, D.; Bruza, P.D.: Towards context sensitive information inference (2003) 0.01
    0.0077912677 = product of:
      0.011686902 = sum of:
        0.002621581 = weight(_text_:s in 1428) [ClassicSimilarity], result of:
          0.002621581 = score(doc=1428,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.060061958 = fieldWeight in 1428, 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=1428)
        0.009065321 = product of:
          0.02719596 = sum of:
            0.02719596 = weight(_text_:22 in 1428) [ClassicSimilarity], result of:
              0.02719596 = score(doc=1428,freq=2.0), product of:
                0.1405835 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04014573 = 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)
          0.33333334 = coord(1/3)
      0.6666667 = coord(2/3)
    
    Date
    22. 3.2003 19:35:46
    Source
    Journal of the American Society for Information Science and technology. 54(2003) no.4, S.321-334
  8. Shiri, A.A.; Revie, C.: Query expansion behavior within a thesaurus-enhanced search environment : a user-centered evaluation (2006) 0.01
    0.0077912677 = product of:
      0.011686902 = sum of:
        0.002621581 = weight(_text_:s in 56) [ClassicSimilarity], result of:
          0.002621581 = score(doc=56,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.060061958 = fieldWeight in 56, 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=56)
        0.009065321 = product of:
          0.02719596 = sum of:
            0.02719596 = weight(_text_:22 in 56) [ClassicSimilarity], result of:
              0.02719596 = score(doc=56,freq=2.0), product of:
                0.1405835 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.04014573 = 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)
          0.33333334 = coord(1/3)
      0.6666667 = coord(2/3)
    
    Date
    22. 7.2006 16:32:43
    Source
    Journal of the American Society for Information Science and Technology. 57(2006) no.4, S.462-478
  9. Jindal, V.; Bawa, S.; Batra, S.: ¬A review of ranking approaches for semantic search on Web (2014) 0.00
    0.0018162847 = product of:
      0.005448854 = sum of:
        0.005448854 = weight(_text_:s in 2799) [ClassicSimilarity], result of:
          0.005448854 = score(doc=2799,freq=6.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.124836445 = fieldWeight in 2799, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.046875 = fieldNorm(doc=2799)
      0.33333334 = coord(1/3)
    
    Source
    Information processing and management. 50(2014) no.2, S.416-425
  10. Hancock-Beaulieu, M.; Walker, S.: ¬An evaluation of automatic query expansion in an online library catalogue (1992) 0.00
    0.0017301554 = product of:
      0.005190466 = sum of:
        0.005190466 = weight(_text_:s in 2731) [ClassicSimilarity], result of:
          0.005190466 = score(doc=2731,freq=4.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.118916616 = fieldWeight in 2731, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.0546875 = fieldNorm(doc=2731)
      0.33333334 = coord(1/3)
    
    Source
    Journal of documentation. 48(1992) no.4, S.406-421
  11. Beaulieu, M.; Jones, S.: Interactive searching and interface issues in the Okapi best match probabilistic retrieval system (1998) 0.00
    0.0017301554 = product of:
      0.005190466 = sum of:
        0.005190466 = weight(_text_:s in 430) [ClassicSimilarity], result of:
          0.005190466 = score(doc=430,freq=4.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.118916616 = fieldWeight in 430, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.0546875 = fieldNorm(doc=430)
      0.33333334 = coord(1/3)
    
    Source
    Interacting with computers. 10(1998) no.3, S.237-248
  12. Srinivasan, P.: Query expansion and MEDLINE (1996) 0.00
    0.0013981767 = product of:
      0.0041945297 = sum of:
        0.0041945297 = weight(_text_:s in 8453) [ClassicSimilarity], result of:
          0.0041945297 = score(doc=8453,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.09609913 = fieldWeight in 8453, 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=8453)
      0.33333334 = coord(1/3)
    
    Source
    Information processing and management. 32(1996) no.4, S.431-443
  13. Kulyukin, V.A.; Settle, A.: Ranked retrieval with semantic networks and vector spaces (2001) 0.00
    0.0013981767 = product of:
      0.0041945297 = sum of:
        0.0041945297 = weight(_text_:s in 6934) [ClassicSimilarity], result of:
          0.0041945297 = score(doc=6934,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.09609913 = fieldWeight in 6934, 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=6934)
      0.33333334 = coord(1/3)
    
    Source
    Journal of the American Society for Information Science and technology. 52(2001) no.14, S.1224-1233
  14. Robertson, S.E.: OKAPI at TREC-3 (1995) 0.00
    0.0012234044 = product of:
      0.0036702133 = sum of:
        0.0036702133 = weight(_text_:s in 5694) [ClassicSimilarity], result of:
          0.0036702133 = score(doc=5694,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.08408674 = fieldWeight in 5694, 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=5694)
      0.33333334 = coord(1/3)
    
    Pages
    27 S
  15. Bhogal, J.; Macfarlane, A.; Smith, P.: ¬A review of ontology based query expansion (2007) 0.00
    0.0012234044 = product of:
      0.0036702133 = sum of:
        0.0036702133 = weight(_text_:s in 919) [ClassicSimilarity], result of:
          0.0036702133 = score(doc=919,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.08408674 = fieldWeight in 919, 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=919)
      0.33333334 = coord(1/3)
    
    Source
    Information processing and management. 43(2007) no.4, S.866-886
  16. Chen, H.; Zhang, Y.; Houston, A.L.: Semantic indexing and searching using a Hopfield net (1998) 0.00
    0.0010486324 = product of:
      0.003145897 = sum of:
        0.003145897 = weight(_text_:s in 5704) [ClassicSimilarity], result of:
          0.003145897 = score(doc=5704,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.072074346 = fieldWeight in 5704, 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=5704)
      0.33333334 = coord(1/3)
    
    Source
    Journal of information science. 24(1998) no.1, S.3-18
  17. Nie, J.-Y.: Query expansion and query translation as logical inference (2003) 0.00
    0.0010486324 = product of:
      0.003145897 = sum of:
        0.003145897 = weight(_text_:s in 1425) [ClassicSimilarity], result of:
          0.003145897 = score(doc=1425,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.072074346 = fieldWeight in 1425, 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=1425)
      0.33333334 = coord(1/3)
    
    Source
    Journal of the American Society for Information Science and technology. 54(2003) no.4, S.335-346
  18. Zhang, W.; Yoshida, T.; Tang, X.: ¬A comparative study of TF*IDF, LSI and multi-words for text classification (2011) 0.00
    0.0010486324 = product of:
      0.003145897 = sum of:
        0.003145897 = weight(_text_:s in 1165) [ClassicSimilarity], result of:
          0.003145897 = score(doc=1165,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.072074346 = fieldWeight in 1165, 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=1165)
      0.33333334 = coord(1/3)
    
    Source
    Expert-systems with applications. 38(2011) no.3, S.2758-2765
  19. Chen, H.; Lally, A.M.; Zhu, B.; Chau, M.: HelpfulMed : Intelligent searching for medical information over the Internet (2003) 0.00
    8.738604E-4 = product of:
      0.002621581 = sum of:
        0.002621581 = weight(_text_:s in 1615) [ClassicSimilarity], result of:
          0.002621581 = score(doc=1615,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.060061958 = fieldWeight in 1615, 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=1615)
      0.33333334 = coord(1/3)
    
    Source
    Journal of the American Society for Information Science and technology. 54(2003) no.7, S.683-694
  20. Quiroga, L.M.; Mostafa, J.: ¬An experiment in building profiles in information filtering : the role of context of user relevance feedback (2002) 0.00
    8.738604E-4 = product of:
      0.002621581 = sum of:
        0.002621581 = weight(_text_:s in 2579) [ClassicSimilarity], result of:
          0.002621581 = score(doc=2579,freq=2.0), product of:
            0.043647945 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.04014573 = queryNorm
            0.060061958 = fieldWeight in 2579, 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=2579)
      0.33333334 = coord(1/3)
    
    Source
    Information processing and management. 38(2002) no.5, S.671-694