Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"Difficult queries"”.
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Improving Web Search for Difficult Queries
… very successfully, there are still a lot of queries that search engines can not answer very effectively and these queries always make users feel frustrated. Since it is quite often that users encounter such ``difficult queries,'' improving Web search for these queries can bring significant …
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Systematic optimization of search engines for difficult queries
… engines, there is still a considerable number of queries that even the best search engines perform poorly on. In this dissertation, we propose a method of optimizing a search engine to better handle such “difficult queries”, which addresses issues and opportunities at three different stages of an …
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Leveraging user interaction to improve search experience with difficult and exploratory queries
… the effective differentiator terms to make their queries specific and precise. In reality, however, a large number of queries are problematic return either too many or no relevant documents in the initial search results. Existing search systems provide no assistance to the users when they cannot …
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The effect of denormalized schemas on ad-hoc query formulation: a human factors experiment in database design
… study of one particular class of query, queries involving join operations. The research presented here provides empirical support for this assertion. However, the implicit assumption that all other queries are neutral in their bias toward a particular level of normalization was found to …