Search (37 results, page 1 of 2)

  • × theme_ss:"Retrievalalgorithmen"
  1. Chang, C.-H.; Hsu, C.-C.: Integrating query expansion and conceptual relevance feedback for personalized Web information retrieval (1998) 0.04 
    0.041996814 = product of:
  0.12599044 = sum of:
    0.12599044 = sum of:
      0.08138241 = weight(_text_:networks in 1319) [ClassicSimilarity], result of:
        0.08138241 = score(doc=1319,freq=2.0), product of:
          0.22247115 = queryWeight, product of:
            4.72992 = idf(docFreq=1060, maxDocs=44218)
            0.047034867 = queryNorm
          0.36581108 = fieldWeight in 1319, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.72992 = idf(docFreq=1060, maxDocs=44218)
            0.0546875 = fieldNorm(doc=1319)
      0.044608027 = weight(_text_:22 in 1319) [ClassicSimilarity], result of:
        0.044608027 = score(doc=1319,freq=2.0), product of:
          0.1647081 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.047034867 = 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)
    Date
    1. 8.1996 22:08:06
    Source
    Computer networks and ISDN systems. 30(1998) nos.1/7, S.621-623
  2. Kulyukin, V.A.; Settle, A.: Ranked retrieval with semantic networks and vector spaces (2001) 0.03 
    0.031002825 = product of:
  0.09300847 = sum of:
    0.09300847 = product of:
      0.18601695 = sum of:
        0.18601695 = weight(_text_:networks in 6934) [ClassicSimilarity], result of:
          0.18601695 = score(doc=6934,freq=8.0), product of:
            0.22247115 = queryWeight, product of:
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.047034867 = queryNorm
            0.8361396 = fieldWeight in 6934, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.0625 = fieldNorm(doc=6934)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Abstract
    The equivalence of semantic networks with spreading activation and vector spaces with dot product is investigated under ranked retrieval. Semantic networks are viewed as networks of concepts organized in terms of abstraction and packaging relations. It is shown that the two models can be effectively constructed from each other. A formal method is suggested to analyze the models in terms of their relative performance in the same universe of objects
  3. Soulier, L.; Jabeur, L.B.; Tamine, L.; Bahsoun, W.: On ranking relevant entities in heterogeneous networks using a language-based model (2013) 0.03 
    0.029997721 = product of:
  0.089993164 = sum of:
    0.089993164 = sum of:
      0.05813029 = weight(_text_:networks in 664) [ClassicSimilarity], result of:
        0.05813029 = score(doc=664,freq=2.0), product of:
          0.22247115 = queryWeight, product of:
            4.72992 = idf(docFreq=1060, maxDocs=44218)
            0.047034867 = queryNorm
          0.26129362 = fieldWeight in 664, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.72992 = idf(docFreq=1060, maxDocs=44218)
            0.0390625 = fieldNorm(doc=664)
      0.031862877 = weight(_text_:22 in 664) [ClassicSimilarity], result of:
        0.031862877 = score(doc=664,freq=2.0), product of:
          0.1647081 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.047034867 = 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)
  0.33333334 = coord(1/3)
    Date
    22. 3.2013 19:34:49
  4. Zhang, D.; Dong, Y.: ¬An effective algorithm to rank Web resources (2000) 0.03 
    0.02712747 = product of:
  0.08138241 = sum of:
    0.08138241 = product of:
      0.16276482 = sum of:
        0.16276482 = weight(_text_:networks in 3662) [ClassicSimilarity], result of:
          0.16276482 = score(doc=3662,freq=2.0), product of:
            0.22247115 = queryWeight, product of:
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.047034867 = queryNorm
            0.73162216 = fieldWeight in 3662, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.109375 = fieldNorm(doc=3662)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Source
    Computer networks. 33(2000) nos.1/6, S.449-455
  5. Finding anything in the billion page Web : are algorithms the key? (1999) 0.03 
    0.02712747 = product of:
  0.08138241 = sum of:
    0.08138241 = product of:
      0.16276482 = sum of:
        0.16276482 = weight(_text_:networks in 6248) [ClassicSimilarity], result of:
          0.16276482 = score(doc=6248,freq=2.0), product of:
            0.22247115 = queryWeight, product of:
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.047034867 = queryNorm
            0.73162216 = fieldWeight in 6248, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.109375 = fieldNorm(doc=6248)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Source
    Computer networks. 31(1999) no.11-16, S.1760-1761
  6. Yan, E.; Ding, Y.; Sugimoto, C.R.: P-Rank: an indicator measuring prestige in heterogeneous scholarly networks (2011) 0.03 
    0.025996659 = product of:
  0.07798997 = sum of:
    0.07798997 = product of:
      0.15597995 = sum of:
        0.15597995 = weight(_text_:networks in 4349) [ClassicSimilarity], result of:
          0.15597995 = score(doc=4349,freq=10.0), product of:
            0.22247115 = queryWeight, product of:
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.047034867 = queryNorm
            0.70112437 = fieldWeight in 4349, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.046875 = fieldNorm(doc=4349)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Abstract
    Ranking scientific productivity and prestige are often limited to homogeneous networks. These networks are unable to account for the multiple factors that constitute the scholarly communication and reward system. This study proposes a new informetric indicator, P-Rank, for measuring prestige in heterogeneous scholarly networks containing articles, authors, and journals. P-Rank differentiates the weight of each citation based on its citing papers, citing journals, and citing authors. Articles from 16 representative library and information science journals are selected as the dataset. Principle Component Analysis is conducted to examine the relationship between P-Rank and other bibliometric indicators. We also compare the correlation and rank variances between citation counts and P-Rank scores. This work provides a new approach to examining prestige in scholarly communication networks in a more comprehensive and nuanced way.
  7. Voorhees, E.M.: Implementing agglomerative hierarchic clustering algorithms for use in document retrieval (1986) 0.02 
    0.016993534 = product of:
  0.0509806 = sum of:
    0.0509806 = product of:
      0.1019612 = sum of:
        0.1019612 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
          0.1019612 = score(doc=402,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = 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)
  0.33333334 = coord(1/3)
    Source
    Information processing and management. 22(1986) no.6, S.465-476
  8. Smeaton, A.F.; Rijsbergen, C.J. van: ¬The retrieval effects of query expansion on a feedback document retrieval system (1983) 0.01 
    0.014869343 = product of:
  0.044608027 = sum of:
    0.044608027 = product of:
      0.08921605 = sum of:
        0.08921605 = weight(_text_:22 in 2134) [ClassicSimilarity], result of:
          0.08921605 = score(doc=2134,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = 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)
  0.33333334 = coord(1/3)
    Date
    30. 3.2001 13:32:22
  9. Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000) 0.01 
    0.014869343 = product of:
  0.044608027 = sum of:
    0.044608027 = product of:
      0.08921605 = sum of:
        0.08921605 = weight(_text_:22 in 3445) [ClassicSimilarity], result of:
          0.08921605 = score(doc=3445,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = 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)
  0.33333334 = coord(1/3)
    Date
    25. 8.2005 17:42:22
  10. Li, J.; Willett, P.: ArticleRank : a PageRank-based alternative to numbers of citations for analysing citation networks (2009) 0.01 
    0.013701442 = product of:
  0.041104324 = sum of:
    0.041104324 = product of:
      0.08220865 = sum of:
        0.08220865 = weight(_text_:networks in 751) [ClassicSimilarity], result of:
          0.08220865 = score(doc=751,freq=4.0), product of:
            0.22247115 = queryWeight, product of:
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.047034867 = queryNorm
            0.369525 = fieldWeight in 751, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.0390625 = fieldNorm(doc=751)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Abstract
    Purpose - The purpose of this paper is to suggest an alternative to the widely used Times Cited criterion for analysing citation networks. The approach involves taking account of the natures of the papers that cite a given paper, so as to differentiate between papers that attract the same number of citations. Design/methodology/approach - ArticleRank is an algorithm that has been derived from Google's PageRank algorithm to measure the influence of journal articles. ArticleRank is applied to two datasets - a citation network based on an early paper on webometrics, and a self-citation network based on the 19 most cited papers in the Journal of Documentation - using citation data taken from the Web of Knowledge database. Findings - ArticleRank values provide a different ranking of a set of papers from that provided by the corresponding Times Cited values, and overcomes the inability of the latter to differentiate between papers with the same numbers of citations. The difference in rankings between Times Cited and ArticleRank is greatest for the most heavily cited articles in a dataset. Originality/value - This is a novel application of the PageRank algorithm.
  11. Jiang, X.; Sun, X.; Yang, Z.; Zhuge, H.; Lapshinova-Koltunski, E.; Yao, J.: Exploiting heterogeneous scientific literature networks to combat ranking bias : evidence from the computational linguistics area (2016) 0.01 
    0.013701442 = product of:
  0.041104324 = sum of:
    0.041104324 = product of:
      0.08220865 = sum of:
        0.08220865 = weight(_text_:networks in 3017) [ClassicSimilarity], result of:
          0.08220865 = score(doc=3017,freq=4.0), product of:
            0.22247115 = queryWeight, product of:
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.047034867 = queryNorm
            0.369525 = fieldWeight in 3017, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3017)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Abstract
    It is important to help researchers find valuable papers from a large literature collection. To this end, many graph-based ranking algorithms have been proposed. However, most of these algorithms suffer from the problem of ranking bias. Ranking bias hurts the usefulness of a ranking algorithm because it returns a ranking list with an undesirable time distribution. This paper is a focused study on how to alleviate ranking bias by leveraging the heterogeneous network structure of the literature collection. We propose a new graph-based ranking algorithm, MutualRank, that integrates mutual reinforcement relationships among networks of papers, researchers, and venues to achieve a more synthetic, accurate, and less-biased ranking than previous methods. MutualRank provides a unified model that involves both intra- and inter-network information for ranking papers, researchers, and venues simultaneously. We use the ACL Anthology Network as the benchmark data set and construct the gold standard from computer linguistics course websites of well-known universities and two well-known textbooks. The experimental results show that MutualRank greatly outperforms the state-of-the-art competitors, including PageRank, HITS, CoRank, Future Rank, and P-Rank, in ranking papers in both improving ranking effectiveness and alleviating ranking bias. Rankings of researchers and venues by MutualRank are also quite reasonable.
  12. Fuhr, N.: Ranking-Experimente mit gewichteter Indexierung (1986) 0.01 
    0.012745151 = product of:
  0.038235452 = sum of:
    0.038235452 = product of:
      0.076470904 = sum of:
        0.076470904 = weight(_text_:22 in 58) [ClassicSimilarity], result of:
          0.076470904 = score(doc=58,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = 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)
  0.33333334 = coord(1/3)
    Date
    14. 6.2015 22:12:44
  13. Fuhr, N.: Rankingexperimente mit gewichteter Indexierung (1986) 0.01 
    0.012745151 = product of:
  0.038235452 = sum of:
    0.038235452 = product of:
      0.076470904 = sum of:
        0.076470904 = weight(_text_:22 in 2051) [ClassicSimilarity], result of:
          0.076470904 = score(doc=2051,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = 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)
  0.33333334 = coord(1/3)
    Date
    14. 6.2015 22:12:56
  14. Ding, Y.; Yan, E.; Frazho, A.; Caverlee, J.: PageRank for ranking authors in co-citation networks (2009) 0.01 
    0.011626059 = product of:
  0.034878176 = sum of:
    0.034878176 = product of:
      0.06975635 = sum of:
        0.06975635 = weight(_text_:networks in 3161) [ClassicSimilarity], result of:
          0.06975635 = score(doc=3161,freq=2.0), product of:
            0.22247115 = queryWeight, product of:
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.047034867 = queryNorm
            0.31355235 = fieldWeight in 3161, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.046875 = fieldNorm(doc=3161)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
  15. Ding, Y.: Topic-based PageRank on author cocitation networks (2011) 0.01 
    0.011626059 = product of:
  0.034878176 = sum of:
    0.034878176 = product of:
      0.06975635 = sum of:
        0.06975635 = weight(_text_:networks in 4348) [ClassicSimilarity], result of:
          0.06975635 = score(doc=4348,freq=2.0), product of:
            0.22247115 = queryWeight, product of:
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.047034867 = queryNorm
            0.31355235 = fieldWeight in 4348, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.72992 = idf(docFreq=1060, maxDocs=44218)
              0.046875 = fieldNorm(doc=4348)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
  16. MacFarlane, A.; Robertson, S.E.; McCann, J.A.: Parallel computing for passage retrieval (2004) 0.01 
    0.008496767 = product of:
  0.0254903 = sum of:
    0.0254903 = product of:
      0.0509806 = sum of:
        0.0509806 = weight(_text_:22 in 5108) [ClassicSimilarity], result of:
          0.0509806 = score(doc=5108,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = 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)
  0.33333334 = coord(1/3)
    Date
    20. 1.2007 18:30:22
  17. Faloutsos, C.: Signature files (1992) 0.01 
    0.008496767 = product of:
  0.0254903 = sum of:
    0.0254903 = product of:
      0.0509806 = sum of:
        0.0509806 = weight(_text_:22 in 3499) [ClassicSimilarity], result of:
          0.0509806 = score(doc=3499,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = queryNorm
            0.30952093 = fieldWeight in 3499, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=3499)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Date
    7. 5.1999 15:22:48
  18. Losada, D.E.; Barreiro, A.: Emebedding term similarity and inverse document frequency into a logical model of information retrieval (2003) 0.01 
    0.008496767 = product of:
  0.0254903 = sum of:
    0.0254903 = product of:
      0.0509806 = sum of:
        0.0509806 = weight(_text_:22 in 1422) [ClassicSimilarity], result of:
          0.0509806 = score(doc=1422,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = queryNorm
            0.30952093 = fieldWeight in 1422, 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=1422)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Date
    22. 3.2003 19:27:23
  19. Bornmann, L.; Mutz, R.: From P100 to P100' : a new citation-rank approach (2014) 0.01 
    0.008496767 = product of:
  0.0254903 = sum of:
    0.0254903 = product of:
      0.0509806 = sum of:
        0.0509806 = weight(_text_:22 in 1431) [ClassicSimilarity], result of:
          0.0509806 = score(doc=1431,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = queryNorm
            0.30952093 = fieldWeight in 1431, 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=1431)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Date
    22. 8.2014 17:05:18
  20. Tober, M.; Hennig, L.; Furch, D.: SEO Ranking-Faktoren und Rang-Korrelationen 2014 : Google Deutschland (2014) 0.01 
    0.008496767 = product of:
  0.0254903 = sum of:
    0.0254903 = product of:
      0.0509806 = sum of:
        0.0509806 = weight(_text_:22 in 1484) [ClassicSimilarity], result of:
          0.0509806 = score(doc=1484,freq=2.0), product of:
            0.1647081 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047034867 = queryNorm
            0.30952093 = fieldWeight in 1484, 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=1484)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
    Date
    13. 9.2014 14:45:22

Authors

Years

Languages

  • e 33
  • d 4

Types

  • a 35
  • m 1
  • r 1
  • More… Less…

Themes

Subjects

Classifications