Search (97 results, page 5 of 5)

  • × theme_ss:"Retrievalstudien"
  • × type_ss:"a"
  1. Kantor, P.; Kim, M.H.; Ibraev, U.; Atasoy, K.: Estimating the number of relevant documents in enormous collections (1999) 0.01
    0.008009318 = product of:
      0.016018637 = sum of:
        0.016018637 = product of:
          0.032037273 = sum of:
            0.032037273 = weight(_text_:k in 6690) [ClassicSimilarity], result of:
              0.032037273 = score(doc=6690,freq=2.0), product of:
                0.16245733 = queryWeight, product of:
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19720423 = fieldWeight in 6690, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=6690)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  2. Radev, D.R.; Libner, K.; Fan, W.: Getting answers to natural language questions on the Web (2002) 0.01
    0.008009318 = product of:
      0.016018637 = sum of:
        0.016018637 = product of:
          0.032037273 = sum of:
            0.032037273 = weight(_text_:k in 5204) [ClassicSimilarity], result of:
              0.032037273 = score(doc=5204,freq=2.0), product of:
                0.16245733 = queryWeight, product of:
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19720423 = fieldWeight in 5204, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=5204)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  3. Kekäläinen, J.; Järvelin, K.: Using graded relevance assessments in IR evaluation (2002) 0.01
    0.008009318 = product of:
      0.016018637 = sum of:
        0.016018637 = product of:
          0.032037273 = sum of:
            0.032037273 = weight(_text_:k in 5225) [ClassicSimilarity], result of:
              0.032037273 = score(doc=5225,freq=2.0), product of:
                0.16245733 = queryWeight, product of:
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19720423 = fieldWeight in 5225, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=5225)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  4. Talvensaari, T.; Laurikkala, J.; Järvelin, K.; Juhola, M.: ¬A study on automatic creation of a comparable document collection in cross-language information retrieval (2006) 0.01
    0.008009318 = product of:
      0.016018637 = sum of:
        0.016018637 = product of:
          0.032037273 = sum of:
            0.032037273 = weight(_text_:k in 5601) [ClassicSimilarity], result of:
              0.032037273 = score(doc=5601,freq=2.0), product of:
                0.16245733 = queryWeight, product of:
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19720423 = fieldWeight in 5601, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=5601)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  5. Lu, K.; Kipp, M.E.I.: Understanding the retrieval effectiveness of collaborative tags and author keywords in different retrieval environments : an experimental study on medical collections (2014) 0.01
    0.008009318 = product of:
      0.016018637 = sum of:
        0.016018637 = product of:
          0.032037273 = sum of:
            0.032037273 = weight(_text_:k in 1215) [ClassicSimilarity], result of:
              0.032037273 = score(doc=1215,freq=2.0), product of:
                0.16245733 = queryWeight, product of:
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19720423 = fieldWeight in 1215, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=1215)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  6. Wartena, C.; Golub, K.: Evaluierung von Verschlagwortung im Kontext des Information Retrievals (2021) 0.01
    0.008009318 = product of:
      0.016018637 = sum of:
        0.016018637 = product of:
          0.032037273 = sum of:
            0.032037273 = weight(_text_:k in 376) [ClassicSimilarity], result of:
              0.032037273 = score(doc=376,freq=2.0), product of:
                0.16245733 = queryWeight, product of:
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19720423 = fieldWeight in 376, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=376)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  7. Belkin, N.J.: ¬An overview of results from Rutgers' investigations of interactive information retrieval (1998) 0.01
    0.007707316 = product of:
      0.015414632 = sum of:
        0.015414632 = product of:
          0.030829264 = sum of:
            0.030829264 = weight(_text_:22 in 2339) [ClassicSimilarity], result of:
              0.030829264 = score(doc=2339,freq=2.0), product of:
                0.15936506 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19345059 = fieldWeight in 2339, 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=2339)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 9.1997 19:16:05
  8. King, D.W.: Blazing new trails : in celebration of an audacious career (2000) 0.01
    0.007707316 = product of:
      0.015414632 = sum of:
        0.015414632 = product of:
          0.030829264 = sum of:
            0.030829264 = weight(_text_:22 in 1184) [ClassicSimilarity], result of:
              0.030829264 = score(doc=1184,freq=2.0), product of:
                0.15936506 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19345059 = fieldWeight in 1184, 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=1184)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 9.1997 19:16:05
  9. Petrelli, D.: On the role of user-centred evaluation in the advancement of interactive information retrieval (2008) 0.01
    0.007707316 = product of:
      0.015414632 = sum of:
        0.015414632 = product of:
          0.030829264 = sum of:
            0.030829264 = weight(_text_:22 in 2026) [ClassicSimilarity], result of:
              0.030829264 = score(doc=2026,freq=2.0), product of:
                0.15936506 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19345059 = fieldWeight in 2026, 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=2026)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Information processing and management. 44(2008) no.1, S.22-38
  10. Pal, S.; Mitra, M.; Kamps, J.: Evaluation effort, reliability and reusability in XML retrieval (2011) 0.01
    0.007707316 = product of:
      0.015414632 = sum of:
        0.015414632 = product of:
          0.030829264 = sum of:
            0.030829264 = weight(_text_:22 in 4197) [ClassicSimilarity], result of:
              0.030829264 = score(doc=4197,freq=2.0), product of:
                0.15936506 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19345059 = fieldWeight in 4197, 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=4197)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 1.2011 14:20:56
  11. Chu, H.: Factors affecting relevance judgment : a report from TREC Legal track (2011) 0.01
    0.007707316 = product of:
      0.015414632 = sum of:
        0.015414632 = product of:
          0.030829264 = sum of:
            0.030829264 = weight(_text_:22 in 4540) [ClassicSimilarity], result of:
              0.030829264 = score(doc=4540,freq=2.0), product of:
                0.15936506 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19345059 = fieldWeight in 4540, 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=4540)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    12. 7.2011 18:29:22
  12. Wildemuth, B.; Freund, L.; Toms, E.G.: Untangling search task complexity and difficulty in the context of interactive information retrieval studies (2014) 0.01
    0.007707316 = product of:
      0.015414632 = sum of:
        0.015414632 = product of:
          0.030829264 = sum of:
            0.030829264 = weight(_text_:22 in 1786) [ClassicSimilarity], result of:
              0.030829264 = score(doc=1786,freq=2.0), product of:
                0.15936506 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19345059 = fieldWeight in 1786, 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=1786)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    6. 4.2015 19:31:22
  13. Ravana, S.D.; Taheri, M.S.; Rajagopal, P.: Document-based approach to improve the accuracy of pairwise comparison in evaluating information retrieval systems (2015) 0.01
    0.007707316 = product of:
      0.015414632 = sum of:
        0.015414632 = product of:
          0.030829264 = sum of:
            0.030829264 = weight(_text_:22 in 2587) [ClassicSimilarity], result of:
              0.030829264 = score(doc=2587,freq=2.0), product of:
                0.15936506 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19345059 = fieldWeight in 2587, 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=2587)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    20. 1.2015 18:30:22
  14. Rajagopal, P.; Ravana, S.D.; Koh, Y.S.; Balakrishnan, V.: Evaluating the effectiveness of information retrieval systems using effort-based relevance judgment (2019) 0.01
    0.007707316 = product of:
      0.015414632 = sum of:
        0.015414632 = product of:
          0.030829264 = sum of:
            0.030829264 = weight(_text_:22 in 5287) [ClassicSimilarity], result of:
              0.030829264 = score(doc=5287,freq=2.0), product of:
                0.15936506 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045509085 = queryNorm
                0.19345059 = fieldWeight in 5287, 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=5287)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    20. 1.2015 18:30:22
  15. Ruthven, I.; Lalmas, M.; Rijsbergen, K. van: Combining and selecting characteristics of information use (2002) 0.01
    0.006407455 = product of:
      0.01281491 = sum of:
        0.01281491 = product of:
          0.02562982 = sum of:
            0.02562982 = weight(_text_:k in 5208) [ClassicSimilarity], result of:
              0.02562982 = score(doc=5208,freq=2.0), product of:
                0.16245733 = queryWeight, product of:
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.045509085 = queryNorm
                0.15776339 = fieldWeight in 5208, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.03125 = fieldNorm(doc=5208)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  16. Lioma, C.; Ounis, I.: ¬A syntactically-based query reformulation technique for information retrieval (2008) 0.01
    0.006407455 = product of:
      0.01281491 = sum of:
        0.01281491 = product of:
          0.02562982 = sum of:
            0.02562982 = weight(_text_:k in 2031) [ClassicSimilarity], result of:
              0.02562982 = score(doc=2031,freq=2.0), product of:
                0.16245733 = queryWeight, product of:
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.045509085 = queryNorm
                0.15776339 = fieldWeight in 2031, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.569778 = idf(docFreq=3384, maxDocs=44218)
                  0.03125 = fieldNorm(doc=2031)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Whereas in language words of high frequency are generally associated with low content [Bookstein, A., & Swanson, D. (1974). Probabilistic models for automatic indexing. Journal of the American Society of Information Science, 25(5), 312-318; Damerau, F. J. (1965). An experiment in automatic indexing. American Documentation, 16, 283-289; Harter, S. P. (1974). A probabilistic approach to automatic keyword indexing. PhD thesis, University of Chicago; Sparck-Jones, K. (1972). A statistical interpretation of term specificity and its application in retrieval. Journal of Documentation, 28, 11-21; Yu, C., & Salton, G. (1976). Precision weighting - an effective automatic indexing method. Journal of the Association for Computer Machinery (ACM), 23(1), 76-88], shallow syntactic fragments of high frequency generally correspond to lexical fragments of high content [Lioma, C., & Ounis, I. (2006). Examining the content load of part of speech blocks for information retrieval. In Proceedings of the international committee on computational linguistics and the association for computational linguistics (COLING/ACL 2006), Sydney, Australia]. We implement this finding to Information Retrieval, as follows. We present a novel automatic query reformulation technique, which is based on shallow syntactic evidence induced from various language samples, and used to enhance the performance of an Information Retrieval system. Firstly, we draw shallow syntactic evidence from language samples of varying size, and compare the effect of language sample size upon retrieval performance, when using our syntactically-based query reformulation (SQR) technique. Secondly, we compare SQR to a state-of-the-art probabilistic pseudo-relevance feedback technique. Additionally, we combine both techniques and evaluate their compatibility. We evaluate our proposed technique across two standard Text REtrieval Conference (TREC) English test collections, and three statistically different weighting models. Experimental results suggest that SQR markedly enhances retrieval performance, and is at least comparable to pseudo-relevance feedback. Notably, the combination of SQR and pseudo-relevance feedback further enhances retrieval performance considerably. These collective experimental results confirm the tenet that high frequency shallow syntactic fragments correspond to content-bearing lexical fragments.
  17. Larsen, B.; Ingwersen, P.; Lund, B.: Data fusion according to the principle of polyrepresentation (2009) 0.01
    0.006165853 = product of:
      0.012331706 = sum of:
        0.012331706 = product of:
          0.024663411 = sum of:
            0.024663411 = weight(_text_:22 in 2752) [ClassicSimilarity], result of:
              0.024663411 = score(doc=2752,freq=2.0), product of:
                0.15936506 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045509085 = queryNorm
                0.15476047 = fieldWeight in 2752, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.03125 = fieldNorm(doc=2752)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 3.2009 18:48:28

Languages

  • e 87
  • d 9
  • f 1
  • More… Less…