Search (2 results, page 1 of 1)

  • × author_ss:"Willett, P."
  • × theme_ss:"Retrievalstudien"
  • × year_i:[1990 TO 2000}
  1. Ekmekcioglu, F.C.; Robertson, A.M.; Willett, P.: Effectiveness of query expansion in ranked-output document retrieval systems (1992) 0.00 
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    Abstract
    Reports an evaluation of 3 methods for the expansion of natural language queries in ranked output retrieval systems. The methods are based on term co-occurrence data, on Soundex codes, and on a string similarity measure. Searches for 110 queries in a data base of 26.280 titles and abstracts suggest that there is no significant difference in retrieval effectiveness between any of these methods and unexpanded searches
    Source
    Journal of information science. 18(1992) no.2, S.139-147
    Theme
    Semantisches Umfeld in Indexierung u. Retrieval
  2. Clarke, S.J.; Willett, P.: Estimating the recall performance of Web search engines (1997) 0.00 
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    Source
    Aslib proceedings. 49(1997) no.7, S.184-189

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