Search (92 results, page 1 of 5)

  • × theme_ss:"Retrievalalgorithmen"
  1. Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983) 0.09 
    0.09307335 = product of:
  0.1861467 = sum of:
    0.1861467 = sum of:
      0.08683402 = weight(_text_:u in 2134) [ClassicSimilarity], result of:
        0.08683402 = score(doc=2134,freq=2.0), product of:
          0.17144279 = queryWeight, product of:
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.052357826 = 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)
      0.09931268 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
        0.09931268 = score(doc=2134,freq=2.0), product of:
          0.1833482 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.052357826 = 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)
    Date
    30. 3.2001 13:32:22
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  2. Faloutsos, C.: Signature files (1992) 0.05 
    0.05318477 = product of:
  0.10636954 = sum of:
    0.10636954 = sum of:
      0.04961944 = weight(_text_:u in 3499) [ClassicSimilarity], result of:
        0.04961944 = score(doc=3499,freq=2.0), product of:
          0.17144279 = queryWeight, product of:
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.052357826 = 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)
      0.056750104 = weight(_text_:22 in 3499) [ClassicSimilarity], result of:
        0.056750104 = score(doc=3499,freq=2.0), product of:
          0.1833482 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.052357826 = 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)
    Date
    7. 5.1999 15:22:48
    Source
    Information retrieval: data structures and algorithms. Ed.: W.B. Frakes u. R. Baeza-Yates
  3. Klas, C.-P.; Fuhr, N.; Schaefer, A.: Evaluating strategic support for information access in the DAFFODIL system (2004) 0.05 
    0.04759597 = product of:
  0.09519194 = sum of:
    0.09519194 = sum of:
      0.052629363 = weight(_text_:u in 2419) [ClassicSimilarity], result of:
        0.052629363 = score(doc=2419,freq=4.0), product of:
          0.17144279 = queryWeight, product of:
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.052357826 = 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)
      0.042562578 = weight(_text_:22 in 2419) [ClassicSimilarity], result of:
        0.042562578 = score(doc=2419,freq=2.0), product of:
          0.1833482 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.052357826 = 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)
    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
  4. Chang, C.-H.; Hsu, C.-C.: Integrating query expansion and conceptual relevance feedback for personalized Web information retrieval (1998) 0.05 
    0.046536677 = product of:
  0.09307335 = sum of:
    0.09307335 = sum of:
      0.04341701 = weight(_text_:u in 1319) [ClassicSimilarity], result of:
        0.04341701 = score(doc=1319,freq=2.0), product of:
          0.17144279 = queryWeight, product of:
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.052357826 = 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)
      0.04965634 = weight(_text_:22 in 1319) [ClassicSimilarity], result of:
        0.04965634 = score(doc=1319,freq=2.0), product of:
          0.1833482 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.052357826 = 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)
    Date
    1. 8.1996 22:08:06
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  5. Soulier, L.; Jabeur, L.B.; Tamine, L.; Bahsoun, W.: On ranking relevant entities in heterogeneous networks using a language-based model (2013) 0.04 
    0.038987175 = sum of:
  0.021252764 = product of:
    0.08501106 = sum of:
      0.08501106 = weight(_text_:authors in 664) [ClassicSimilarity], result of:
        0.08501106 = score(doc=664,freq=4.0), product of:
          0.2386896 = queryWeight, product of:
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.052357826 = queryNorm
          0.35615736 = fieldWeight in 664, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.0390625 = fieldNorm(doc=664)
    0.25 = coord(1/4)
  0.017734408 = product of:
    0.035468817 = sum of:
      0.035468817 = weight(_text_:22 in 664) [ClassicSimilarity], result of:
        0.035468817 = score(doc=664,freq=2.0), product of:
          0.1833482 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.052357826 = queryNorm
          0.19345059 = fieldWeight in 664, 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=664)
    0.5 = coord(1/2)
    Abstract
    A new challenge, accessing multiple relevant entities, arises from the availability of linked heterogeneous data. In this article, we address more specifically the problem of accessing relevant entities, such as publications and authors within a bibliographic network, given an information need. We propose a novel algorithm, called BibRank, that estimates a joint relevance of documents and authors within a bibliographic network. This model ranks each type of entity using a score propagation algorithm with respect to the query topic and the structure of the underlying bi-type information entity network. Evidence sources, namely content-based and network-based scores, are both used to estimate the topical similarity between connected entities. For this purpose, authorship relationships are analyzed through a language model-based score on the one hand and on the other hand, non topically related entities of the same type are detected through marginal citations. The article reports the results of experiments using the Bibrank algorithm for an information retrieval task. The CiteSeerX bibliographic data set forms the basis for the topical query automatic generation and evaluation. We show that a statistically significant improvement over closely related ranking models is achieved.
    Date
    22. 3.2013 19:34:49
  6. Information retrieval : data structures and algorithms (1992) 0.04 
    0.036956877 = sum of:
  0.015027974 = product of:
    0.060111895 = sum of:
      0.060111895 = weight(_text_:authors in 3495) [ClassicSimilarity], result of:
        0.060111895 = score(doc=3495,freq=2.0), product of:
          0.2386896 = queryWeight, product of:
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.052357826 = queryNorm
          0.25184128 = fieldWeight in 3495, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.0390625 = fieldNorm(doc=3495)
    0.25 = coord(1/4)
  0.0219289 = product of:
    0.0438578 = sum of:
      0.0438578 = weight(_text_:u in 3495) [ClassicSimilarity], result of:
        0.0438578 = score(doc=3495,freq=4.0), product of:
          0.17144279 = queryWeight, product of:
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.052357826 = queryNorm
          0.25581595 = fieldWeight in 3495, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.0390625 = fieldNorm(doc=3495)
    0.5 = coord(1/2)
    Abstract
    The book consists of separate chapters by some 20 different authors. It covers many of the information retrieval algorithms, including methods of file organization, file search and access, and query processing
    Content
    An edited volume containing data structures and algorithms for information retrieval including a disk with examples written in C. for prgrammers and students interested in parsing text, automated indexing, its the first collection in book form of the basic data structures and algorithms that are critical to the storage and retrieval of documents. ------------------Enthält die Kapitel: FRAKES, W.B.: Introduction to information storage and retrieval systems; BAEZA-YATES, R.S.: Introduction to data structures and algorithms related to information retrieval; HARMAN, D. u.a.: Inverted files; FALOUTSOS, C.: Signature files; GONNET, G.H. u.a.: New indices for text: PAT trees and PAT arrays; FORD, D.A. u. S. CHRISTODOULAKIS: File organizations for optical disks; FOX, C.: Lexical analysis and stoplists; FRAKES, W.B.: Stemming algorithms; SRINIVASAN, P.: Thesaurus construction; BAEZA-YATES, R.A.: String searching algorithms; HARMAN, D.: Relevance feedback and other query modification techniques; WARTIK, S.: Boolean operators; WARTIK, S. u.a.: Hashing algorithms; HARMAN, D.: Ranking algorithms; FOX, E.: u.a.: Extended Boolean models; RASMUSSEN, E.: Clustering algorithms; HOLLAAR, L.: Special-purpose hardware for information retrieval; STANFILL, C.: Parallel information retrieval algorithms
    Editor
    Frakes, W.B. u. R. Baeza-Yates
  7. Efthimiadis, E.N.: User choices : a new yardstick for the evaluation of ranking algorithms for interactive query expansion (1995) 0.03 
    0.033240482 = product of:
  0.066480964 = sum of:
    0.066480964 = sum of:
      0.03101215 = weight(_text_:u in 5697) [ClassicSimilarity], result of:
        0.03101215 = score(doc=5697,freq=2.0), product of:
          0.17144279 = queryWeight, product of:
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.052357826 = 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)
      0.035468817 = weight(_text_:22 in 5697) [ClassicSimilarity], result of:
        0.035468817 = score(doc=5697,freq=2.0), product of:
          0.1833482 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.052357826 = 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)
    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) 0.03 
    0.033240482 = product of:
  0.066480964 = sum of:
    0.066480964 = sum of:
      0.03101215 = weight(_text_:u in 1428) [ClassicSimilarity], result of:
        0.03101215 = score(doc=1428,freq=2.0), product of:
          0.17144279 = queryWeight, product of:
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.052357826 = 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)
      0.035468817 = weight(_text_:22 in 1428) [ClassicSimilarity], result of:
        0.035468817 = score(doc=1428,freq=2.0), product of:
          0.1833482 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.052357826 = 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)
    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) 0.03 
    0.033240482 = product of:
  0.066480964 = sum of:
    0.066480964 = sum of:
      0.03101215 = weight(_text_:u in 56) [ClassicSimilarity], result of:
        0.03101215 = score(doc=56,freq=2.0), product of:
          0.17144279 = queryWeight, product of:
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.052357826 = 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)
      0.035468817 = weight(_text_:22 in 56) [ClassicSimilarity], result of:
        0.035468817 = score(doc=56,freq=2.0), product of:
          0.1833482 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.052357826 = 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)
    Date
    22. 7.2006 16:32:43
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  10. Voorhees, E.M.: Implementing agglomerative hierarchic clustering algorithms for use in document retrieval (1986) 0.03 
    0.028375052 = product of:
  0.056750104 = sum of:
    0.056750104 = product of:
      0.11350021 = sum of:
        0.11350021 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
          0.11350021 = score(doc=402,freq=2.0), product of:
            0.1833482 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.052357826 = 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
  11. Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000) 0.02 
    0.02482817 = product of:
  0.04965634 = sum of:
    0.04965634 = product of:
      0.09931268 = sum of:
        0.09931268 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
          0.09931268 = score(doc=3445,freq=2.0), product of:
            0.1833482 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.052357826 = 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
  12. Khoo, C.S.G.; Wan, K.-W.: ¬A simple relevancy-ranking strategy for an interface to Boolean OPACs (2004) 0.02 
    0.022933666 = sum of:
  0.010519581 = product of:
    0.042078324 = sum of:
      0.042078324 = weight(_text_:authors in 2509) [ClassicSimilarity], result of:
        0.042078324 = score(doc=2509,freq=2.0), product of:
          0.2386896 = queryWeight, product of:
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.052357826 = queryNorm
          0.17628889 = fieldWeight in 2509, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.02734375 = fieldNorm(doc=2509)
    0.25 = coord(1/4)
  0.012414085 = product of:
    0.02482817 = sum of:
      0.02482817 = weight(_text_:22 in 2509) [ClassicSimilarity], result of:
        0.02482817 = score(doc=2509,freq=2.0), product of:
          0.1833482 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.052357826 = 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)
    Abstract
    A relevancy-ranking algorithm for a natural language interface to Boolean online public access catalogs (OPACs) was formulated and compared with that currently used in a knowledge-based search interface called the E-Referencer, being developed by the authors. The algorithm makes use of seven weIl-known ranking criteria: breadth of match, section weighting, proximity of query words, variant word forms (stemming), document frequency, term frequency and document length. The algorithm converts a natural language query into a series of increasingly broader Boolean search statements. In a small experiment with ten subjects in which the algorithm was simulated by hand, the algorithm obtained good results with a mean overall precision of 0.42 and mean average precision of 0.62, representing a 27 percent improvement in precision and 41 percent improvement in average precision compared to the E-Referencer. The usefulness of each step in the algorithm was analyzed and suggestions are made for improving the algorithm.
    Source
    Electronic library. 22(2004) no.2, S.112-120
  13. Ding, Y.; Yan, E.; Frazho, A.; Caverlee, J.: PageRank for ranking authors in co-citation networks (2009) 0.02 
    0.02208652 = product of:
  0.04417304 = sum of:
    0.04417304 = product of:
      0.17669216 = sum of:
        0.17669216 = weight(_text_:authors in 3161) [ClassicSimilarity], result of:
          0.17669216 = score(doc=3161,freq=12.0), product of:
            0.2386896 = queryWeight, product of:
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.052357826 = queryNorm
            0.7402591 = fieldWeight in 3161, product of:
              3.4641016 = tf(freq=12.0), with freq of:
                12.0 = termFreq=12.0
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.046875 = fieldNorm(doc=3161)
      0.25 = coord(1/4)
  0.5 = coord(1/2)
    Abstract
    This paper studies how varied damping factors in the PageRank algorithm influence the ranking of authors and proposes weighted PageRank algorithms. We selected the 108 most highly cited authors in the information retrieval (IR) area from the 1970s to 2008 to form the author co-citation network. We calculated the ranks of these 108 authors based on PageRank with the damping factor ranging from 0.05 to 0.95. In order to test the relationship between different measures, we compared PageRank and weighted PageRank results with the citation ranking, h-index, and centrality measures. We found that in our author co-citation network, citation rank is highly correlated with PageRank with different damping factors and also with different weighted PageRank algorithms; citation rank and PageRank are not significantly correlated with centrality measures; and h-index rank does not significantly correlate with centrality measures but does significantly correlate with other measures. The key factors that have impact on the PageRank of authors in the author co-citation network are being co-cited with important authors.
  14. Fuhr, N.: Ranking-Experimente mit gewichteter Indexierung (1986) 0.02 
    0.021281289 = product of:
  0.042562578 = sum of:
    0.042562578 = product of:
      0.085125156 = sum of:
        0.085125156 = weight(_text_:22 in 58) [ClassicSimilarity], result of:
          0.085125156 = score(doc=58,freq=2.0), product of:
            0.1833482 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.052357826 = 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
  15. Fuhr, N.: Rankingexperimente mit gewichteter Indexierung (1986) 0.02 
    0.021281289 = product of:
  0.042562578 = sum of:
    0.042562578 = product of:
      0.085125156 = sum of:
        0.085125156 = weight(_text_:22 in 2051) [ClassicSimilarity], result of:
          0.085125156 = score(doc=2051,freq=2.0), product of:
            0.1833482 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.052357826 = 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
  16. Cross-language information retrieval (1998) 0.02 
    0.020942643 = sum of:
  0.007513987 = product of:
    0.030055948 = sum of:
      0.030055948 = weight(_text_:authors in 6299) [ClassicSimilarity], result of:
        0.030055948 = score(doc=6299,freq=2.0), product of:
          0.2386896 = queryWeight, product of:
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.052357826 = queryNorm
          0.12592064 = fieldWeight in 6299, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.01953125 = fieldNorm(doc=6299)
    0.25 = coord(1/4)
  0.013428655 = product of:
    0.02685731 = sum of:
      0.02685731 = weight(_text_:u in 6299) [ClassicSimilarity], result of:
        0.02685731 = score(doc=6299,freq=6.0), product of:
          0.17144279 = queryWeight, product of:
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.052357826 = queryNorm
          0.15665466 = fieldWeight in 6299, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            3.2744443 = idf(docFreq=4547, maxDocs=44218)
            0.01953125 = fieldNorm(doc=6299)
    0.5 = coord(1/2)
    Content
    Enthält die Beiträge: GREFENSTETTE, G.: The Problem of Cross-Language Information Retrieval; DAVIS, M.W.: On the Effective Use of Large Parallel Corpora in Cross-Language Text Retrieval; BALLESTEROS, L. u. W.B. CROFT: Statistical Methods for Cross-Language Information Retrieval; Distributed Cross-Lingual Information Retrieval; Automatic Cross-Language Information Retrieval Using Latent Semantic Indexing; EVANS, D.A. u.a.: Mapping Vocabularies Using Latent Semantics; PICCHI, E. u. C. PETERS: Cross-Language Information Retrieval: A System for Comparable Corpus Querying; YAMABANA, K. u.a.: A Language Conversion Front-End for Cross-Language Information Retrieval; GACHOT, D.A. u.a.: The Systran NLP Browser: An Application of Machine Translation Technology in Cross-Language Information Retrieval; HULL, D.: A Weighted Boolean Model for Cross-Language Text Retrieval; SHERIDAN, P. u.a. Building a Large Multilingual Test Collection from Comparable News Documents; OARD; D.W. u. B.J. DORR: Evaluating Cross-Language Text Filtering Effectiveness
    Footnote
    The retrieved output from a query including the phrase 'big rockets' may be, for instance, a sentence containing 'giant rocket' which is semantically ranked above 'military ocket'. David Hull (Xerox Research Centre, Grenoble) describes an implementation of a weighted Boolean model for Spanish-English CLIR. Users construct Boolean-type queries, weighting each term in the query, which is then translated by an on-line dictionary before being applied to the database. Comparisons with the performance of unweighted free-form queries ('vector space' models) proved encouraging. Two contributions consider the evaluation of CLIR systems. In order to by-pass the time-consuming and expensive process of assembling a standard collection of documents and of user queries against which the performance of an CLIR system is manually assessed, Páriac Sheridan et al (ETH Zurich) propose a method based on retrieving 'seed documents'. This involves identifying a unique document in a database (the 'seed document') and, for a number of queries, measuring how fast it is retrieved. The authors have also assembled a large database of multilingual news documents for testing purposes. By storing the (fairly short) documents in a structured form tagged with descriptor codes (e.g. for topic, country and area), the test suite is easily expanded while remaining consistent for the purposes of testing. Douglas Ouard and Bonne Dorr (University of Maryland) describe an evaluation methodology which appears to apply LSI techniques in order to filter and rank incoming documents designed for testing CLIR systems. The volume provides the reader an excellent overview of several projects in CLIR. It is well supported with references and is intended as a secondary text for researchers and practitioners. It highlights the need for a good, general tutorial introduction to the field."
  17. Robertson, S.E.: ¬The probability ranking principle in IR (1977) 0.02 
    0.018607289 = product of:
  0.037214577 = sum of:
    0.037214577 = product of:
      0.074429154 = sum of:
        0.074429154 = weight(_text_:u in 1935) [ClassicSimilarity], result of:
          0.074429154 = score(doc=1935,freq=2.0), product of:
            0.17144279 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.052357826 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willet. San Francisco: Morgan Kaufmann 1997. S.281-286.
  18. Salton, G.; Buckley, C.: Term-weighting approaches in automatic text retrieval (1988) 0.02 
    0.018607289 = product of:
  0.037214577 = sum of:
    0.037214577 = product of:
      0.074429154 = sum of:
        0.074429154 = weight(_text_:u in 1938) [ClassicSimilarity], result of:
          0.074429154 = score(doc=1938,freq=2.0), product of:
            0.17144279 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.052357826 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.323-328.
  19. Sparck Jones, K.: Search term relevance weighting given little relevance information (1979) 0.02 
    0.018607289 = product of:
  0.037214577 = sum of:
    0.037214577 = product of:
      0.074429154 = sum of:
        0.074429154 = weight(_text_:u in 1939) [ClassicSimilarity], result of:
          0.074429154 = score(doc=1939,freq=2.0), product of:
            0.17144279 = queryWeight, product of:
              3.2744443 = idf(docFreq=4547, maxDocs=44218)
              0.052357826 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.329-338.
  20. Ding, Y.: Topic-based PageRank on author cocitation networks (2011) 0.02 
    0.015617528 = product of:
  0.031235056 = sum of:
    0.031235056 = product of:
      0.124940224 = sum of:
        0.124940224 = weight(_text_:authors in 4348) [ClassicSimilarity], result of:
          0.124940224 = score(doc=4348,freq=6.0), product of:
            0.2386896 = queryWeight, product of:
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.052357826 = queryNorm
            0.52344227 = fieldWeight in 4348, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.046875 = fieldNorm(doc=4348)
      0.25 = coord(1/4)
  0.5 = coord(1/2)
    Abstract
    Ranking authors is vital for identifying a researcher's impact and standing within a scientific field. There are many different ranking methods (e.g., citations, publications, h-index, PageRank, and weighted PageRank), but most of them are topic-independent. This paper proposes topic-dependent ranks based on the combination of a topic model and a weighted PageRank algorithm. The author-conference-topic (ACT) model was used to extract topic distribution of individual authors. Two ways for combining the ACT model with the PageRank algorithm are proposed: simple combination (I_PR) or using a topic distribution as a weighted vector for PageRank (PR_t). Information retrieval was chosen as the test field and representative authors for different topics at different time phases were identified. Principal component analysis (PCA) was applied to analyze the ranking difference between I_PR and PR_t.

Authors

Years

Languages

  • e 80
  • d 11
  • m 1
  • More… Less…

Types

  • a 82
  • m 7
  • s 3
  • el 1
  • p 1
  • r 1
  • More… Less…

Themes

Subjects

Classifications