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… way to do this is to look at the application of special features, in this case query expansion (QE) and relevance feedback (RF). Both these methods aim for a better matching of documents and the searchers information need. Another feature of these methods is that they can …
… of any importance i. e. if many terms from a thesaurus helped or destroyed a query. To answer these questions i used two online thesauri, Rogets thesaurus and Merriam-Webster Online and one printed bilingual dictionary, Norstedts English-Swedish dictionary. Even though the …
En komparativ studie av fyra metoder för relevance feedback
… 20 % of the topics. Further analysis argued that this depends on the lack of query expansion in the binary independence model which is advantageous for some topics although has a negative effect on retrieval efficiency in general. On the second ground Okapi BM25 performed …
