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  • × author_ss:"Willett, P."
  1. Robertson, A.M.; Willett, P.: Applications of n-grams in textual information systems (1998) 0.04 
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    Source
    Journal of documentation. 54(1998) no.1, S.48-69
  2. Jones, G.; Robertson, A.M.; Willett, P.: ¬An introduction to genetic algorithms and to their use in information retrieval (1994) 0.02 
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    Abstract
    This paper provides an introduction to genetic algorithms, a new approach to the investigation of computationally-intensive problems that may be insoluble using conventional, deterministic approaches. A genetic algorithm takes an initial set of possible starting solutions and then iteratively improves theses solutions using operators that are analogous to those involved in Darwinian evolution. The approach is illusrated by reference to several problems in information retrieval
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  3. Robertson, A.M.; Willett, P.: Generation of equifrequent groups of words using a genetic algorithm (1994) 0.01 
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    Abstract
    Genetic algorithms are a class of non-deterministic algorithms that derive from Darwinian evolution and that provide good, though not necessarily optimal, solutions to combinatorial problems. We describe their application to the identification of characteristics that occur approximately equifrequently in a database, using two different methods for the creation of the chromosome data structures that lie at the heart of a genetic algortihm. Experiments with files of English and Turkish text suggest that the genetic algorithm developed here can produce results superior to those produced by existing non-deterministic algorithms; however, the results are inferior to those produced by an existing deterministic algorithm
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  4. Artymiuk, P.J.; Spriggs, R.V.; Willett, P.: Graph theoretic methods for the analysis of structural relationships in biological macromolecules (2005) 0.01 
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    Date
    22. 7.2006 14:40:10
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  5. Griffiths, A.; Robinson, L.A.; Willett, P.: Hierarchic agglomerative clustering methods for automatic document classification (1984) 0.00 
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  6. Willett, P.: Recent trends in hierarchic document clustering : a critical review (1988) 0.00 
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  7. Al-Hawamdeh, S.; Smith, G.; Willett, P.: Paragraph-based access to full-text documents using a hypertext system (1991) 0.00 
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  8. Griffiths, A.; Luckhurst, H.C.; Willett, P.: Using interdocument similarity information in document retrieval systems (1986) 0.00 
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  9. Perry, R.; Willett, P.: ¬A revies of the use of inverted files for best match searching in information retrieval systems (1983) 0.00 
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  10. Ekmekcioglu, F.C.; Willett, P.: Effectiveness of stemming for Turkish text retrieval (2000) 0.00 
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  11. Willett, P.; Robertson, S.: In memoriam: Karen Sparck Jones (2007) 0.00 
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  12. Willett, P.: Best-match text retrieval (1993) 0.00 
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  13. Al-Hawamdeh, S.; Smith, G.; Willett, P.; Vere, R. de: Using nearest-neighbour searching techniques to access full-text documents (1991) 0.00 
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  14. Shaw, R.J.; Willett, P.: On the non-random nature of nearest-neighbour document clusters (1993) 0.00 
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  15. Robertson, A.M.; Willett, P.: Identification of word-variants in historical text databases : report for the period October 1990 to September 1992 (1994) 0.00 
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  16. Furner-Hines, J.; Willett, P.: ¬The use of hypertext in libraries in the United Kingdom (1994) 0.00 
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  17. Robertson, A.M.; Willett, P.: Use of genetic algorithms in information retrieval (1995) 0.00 
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  18. Ingwersen, P.; Willett, P.: ¬An introduction to algorithmic and cognitive approaches for information retrieval (1995) 0.00 
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  19. Robertson, M.; Willett, P.: ¬An upperbound to the performance of ranked output searching : optimal weighting of query terms using a genetic algorithms (1996) 0.00 
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  20. Clarke, S.J.; Willett, P.: Estimating the recall performance of Web search engines (1997) 0.00 
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