Search (96 results, page 1 of 5)

  • × theme_ss:"Suchmaschinen"
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  1. Gardner, T.; Iannella, R.: Architecture and software solutions (2000) 0.06 
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    Date
    22. 6.2002 19:38:24
  2. Koch, T.: Quality-controlled subject gateways : definitions, typologies, empirical overview (2000) 0.05 
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    Date
    22. 6.2002 19:37:55
  3. Boldi, P.; Santini, M.; Vigna, S.: PageRank as a function of the damping factor (2005) 0.04 
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    Abstract
    PageRank is defined as the stationary state of a Markov chain. The chain is obtained by perturbing the transition matrix induced by a web graph with a damping factor alpha that spreads uniformly part of the rank. The choice of alpha is eminently empirical, and in most cases the original suggestion alpha=0.85 by Brin and Page is still used. Recently, however, the behaviour of PageRank with respect to changes in alpha was discovered to be useful in link-spam detection. Moreover, an analytical justification of the value chosen for alpha is still missing. In this paper, we give the first mathematical analysis of PageRank when alpha changes. In particular, we show that, contrarily to popular belief, for real-world graphs values of alpha close to 1 do not give a more meaningful ranking. Then, we give closed-form formulae for PageRank derivatives of any order, and an extension of the Power Method that approximates them with convergence O(t**k*alpha**t) for the k-th derivative. Finally, we show a tight connection between iterated computation and analytical behaviour by proving that the k-th iteration of the Power Method gives exactly the PageRank value obtained using a Maclaurin polynomial of degree k. The latter result paves the way towards the application of analytical methods to the study of PageRank.
    Date
    16. 1.2016 10:22:28
  4. Duval, B.K.; Main, L.: Searching the Internet : part 2 trail-blazers (1997) 0.04 
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    Content
    T.1 u.d.T.: Searching the Net: general overview in: 15(1996) no.4
    Date
    6. 3.1997 16:22:15
  5. Fischer, T.; Neuroth, H.: SSG-FI - special subject gateways to high quality Internet resources for scientific users (2000) 0.04 
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    Date
    22. 6.2002 19:40:42
  6. Large, A.; Beheshti, J.; Rahman, T.: Design criteria for children's Web portals : the users speak out (2002) 0.04 
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    Date
    2. 6.2005 10:34:22
  7. Nicholson, S.; Sierra, T.; Eseryel, U.Y.; Park, J.-H.; Barkow, P.; Pozo, E.J.; Ward, J.: How much of it is real? : analysis of paid placement in Web search engine results (2006) 0.04 
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    Date
    22. 7.2006 16:32:57
  8. Page, L.; Brin, S.; Motwani, R.; Winograd, T.: ¬The PageRank citation ranking : Bringing order to the Web (1999) 0.03 
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  9. Stanley, T.: To meta-search or not to meta-search? (1999) 0.03 
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  10. Bar-Ilan, J.; Gutman,T.: How do search engines respond to some non-English queries? (2005) 0.03 
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  11. Li, L.; Shang, Y.; Zhang, W.: Improvement of HITS-based algorithms on Web documents 0.03 
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    Content
    Vgl.: http%3A%2F%2Fdelab.csd.auth.gr%2F~dimitris%2Fcourses%2Fir_spring06%2Fpage_rank_computing%2Fp527-li.pdf. Vgl. auch: http://www2002.org/CDROM/refereed/643/.
  12. Gossen, T.: Search engines for children : search user interfaces and information-seeking behaviour (2016) 0.02 
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    Date
    1. 2.2016 18:25:22
  13. Koch, T.: Searching the Web : systematic overview over indexes (1995) 0.02 
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  14. Koch, T.: Suchmaschinen im Internet (1996) 0.02 
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  15. Ardö, A.; Koch, T.: Automatic classification applied to full-text Internet documents in a robot-generated subject index (1999) 0.02 
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  16. Stanley, T.: Alta Vista vs. Lycos (1996) 0.02 
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  17. MacLeod, R.: Promoting a subject gateway : a case study from EEVL (Edinburgh Engineering Virtual Library) (2000) 0.02 
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    Date
    22. 6.2002 19:40:22
  18. Vidmar, D.J.: Darwin on the Web : the evolution of search tools (1999) 0.02 
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    Source
    Computers in libraries. 19(1999) no.5, S.22-28
  19. Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000) 0.02 
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    Date
    25. 8.2005 17:42:22
  20. Dunning, A.: Do we still need search engines? (1999) 0.02 
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              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=6021)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Ariadne. 1999, no.22

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