Search (5 results, page 1 of 1)

  • × author_ss:"Robertson, S.E."
  • × type_ss:"a"
  • × year_i:[1970 TO 1980}
  1. Robertson, S.E.: ¬The probabilistic character of relevance (1977) 0.00 
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    Source
    Information processing and management. 13(1977), S.247-251
  2. Robertson, S.E.; Sparck Jones, K.: Relevance weighting of search terms (1976) 0.00 
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    Abstract
    Examines statistical techniques for exploiting relevance information to weight search terms. These techniques are presented as a natural extension of weighting methods using information about the distribution of index terms in documents in general. A series of relevance weighting functions is derived and is justified by theoretical considerations. In particular, it is shown that specific weighted search methods are implied by a general probabilistic theory of retrieval. Different applications of relevance weighting are illustrated by experimental results for test collections
    Source
    Journal of the American Society for Information Science. 27(1976), S.129-146
  3. Robertson, S.E.: ¬The probability ranking principle in IR (1977) 0.00 
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    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willet. San Francisco: Morgan Kaufmann 1997. S.281-286.
  4. Robertson, S.E.: Theories and models in information retrieval (1977) 0.00 
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    Abstract
    This paper is concerned with recent work in the theory of information retrieval. More particularly, it is concerned with theories which tackle the problem of retrieval performance, in a sense which will be explained. The aim is not an exhaustive survey of such work; rather it is an analysis and synthesis of those contributions which I feel to be important or find interesting
  5. Robertson, S.E.; Walker, S.: Some simple effective approximations to the 2-Poisson molde for probabilisitc weighted retrieval (1979) 0.00 
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    Footnote
    Wiederabgedruckt in: Readings in information retrieval. Ed.: K. Sparck Jones u. P. Willett. San Francisco: Morgan Kaufmann 1997. S.345-453.

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