Search (84 results, page 1 of 5)

  • × theme_ss:"Retrievalstudien"
  1. Pao, M.L.: Retrieval differences between term and citation indexing (1989) 0.05 
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    Pages
    S.113-120
  2. Sullivan, M.V.; Borgman, C.L.: Bibliographic searching by end-users and intermediaries : front-end software vs native DIALOG commands (1988) 0.04 
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    Pages
    S.120-126
  3. López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Order-based fitness functions for genetic algorithms applied to relevance feedback (2003) 0.03 
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    Abstract
    Lopez-Pujalte and Guerrero-Bote test a relevance feedback genetic algorithm while varying its order based fitness functions and generating a function based upon the Ide dec-hi method as a base line. Using the non-zero weighted term types assigned to the query, and to the initially retrieved set of documents, as genes, a chromosome of equal length is created for each. The algorithm is provided with the chromosomes for judged relevant documents, for judged irrelevant documents, and for the irrelevant documents with their terms negated. The algorithm uses random selection of all possible genes, but gives greater likelihood to those with higher fitness values. When the fittest chromosome of a previous population is eliminated it is restored while the least fittest of the new population is eliminated in its stead. A crossover probability of .8 and a mutation probability of .2 were used with 20 generations. Three fitness functions were utilized; the Horng and Yeh function which takes into account the position of relevant documents, and two new functions, one based on accumulating the cosine similarity for retrieved documents, the other on stored fixed-recall-interval precessions. The Cranfield collection was used with the first 15 documents retrieved from 33 queries chosen to have at least 3 relevant documents in the first 15 and at least 5 relevant documents not initially retrieved. Precision was calculated at fixed recall levels using the residual collection method which removes viewed documents. One of the three functions improved the original retrieval by127 percent, while the Ide dec-hi method provided a 120 percent improvement.
  4. Lancaster, F.W.: Evaluating the performance of a large computerized information system (1985) 0.02 
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    Footnote
    Original in: Journal of the American Medical Association 207(1969) S.114-120.
  5. Rijsbergen, C.J. van: ¬A test for the separation of relevant and non-relevant documents in experimental retrieval collections (1973) 0.02 
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    Date
    19. 3.1996 11:22:12
    Source
    Journal of documentation. 29(1973) no.3, S.251-257
  6. Chu, H.: Factors affecting relevance judgment : a report from TREC Legal track (2011) 0.01 
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    Date
    12. 7.2011 18:29:22
  7. Hofstede, M.: Literatuur over onderwerpen zoeken in de OPC (1994) 0.01 
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    Source
    CRI bulletin. 29(1994), Sept., S.14-15
  8. Hancock-Beaulieu, M.; McKenzie, L.; Irving, A.: Evaluative protocols for searching behaviour in online library catalogues (1991) 0.01 
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    Date
    23. 1.1999 19:52:29
  9. Harman, D.K.: ¬The TREC test collections (2005) 0.01 
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    Date
    29. 3.1996 18:16:49
  10. Buckley, C.; Voorhees, E.M.: Retrieval system evaluation (2005) 0.01 
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    Date
    29. 3.1996 18:16:49
  11. Voiskunskii, V.G.: Evaluation of search results (2000) 0.01 
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    Source
    Encyclopedia of library and information science. Vol.66, [=Suppl.29]
  12. Harman, D.K.: ¬The TREC ad hoc experiments (2005) 0.01 
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    Date
    29. 3.1996 18:16:49
  13. Robertson, S.; Callan, J.: Routing and filtering (2005) 0.01 
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    Date
    29. 3.1996 18:16:49
  14. Beaulieu, M.: Approaches to user-based studies in information seeking and retrieval : a Sheffield perspective (2003) 0.01 
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    Source
    Journal of information science. 29(2003) no.4, S.239-248
  15. Harman, D.K.: Beyond English (2005) 0.01 
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    Date
    29. 3.1996 18:16:49
  16. Voorhees, E.M.; Garofolo, J.S.: Retrieving noisy text (2005) 0.01 
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    Date
    29. 3.1996 18:16:49
  17. Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.01 
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    Date
    20.10.2000 12:22:23
  18. Tomaiuolo, N.G.; Parker, J.: Maximizing relevant retrieval : keyword and natural language searching (1998) 0.01 
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    Source
    Online. 22(1998) no.6, S.57-58
  19. Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000) 0.01 
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    Date
    11. 8.2001 16:22:19
  20. Dalrymple, P.W.: Retrieval by reformulation in two library catalogs : toward a cognitive model of searching behavior (1990) 0.01 
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    Date
    22. 7.2006 18:43:54

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