Search (7 results, page 1 of 1)

  • × author_ss:"Robertson, S.E."
  • × year_i:[1970 TO 1980}
  1. Robertson, S.E.: Indexing theory and retrieval effectiveness (1979) 0.00 
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  2. Robertson, S.E.; Belkin, N.J.: Ranking in principle (1978) 0.00 
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  3. Robertson, S.E.: ¬The probabilistic character of relevance (1977) 0.00 
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  4. 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
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  5. Robertson, S.E.: ¬The probability ranking principle in IR (1977) 0.00 
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  6. 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
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  7. 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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