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...results. u-kranks and global top-k are two semantics of top-k queries in uncertain database, which consider every alternative in x-tuple as single one...tuple, we define two novel top-k queries semantics in uncertain database, uncertain x-kranks queries (u-x-kranks) and global...
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top-k processing in uncertain databases is semanti- cally and computationally different from traditional top-k processing. the interplay between score and...introduce new probabilistic formulations for top-k queries. our for- mulations are based on "marriage" of traditional top-k se- mantics and possible worlds semantics. in the light of these formulations...
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...for which this product is in the top- k query result set? we identify a novel query type, namely reverse top-k query, that is essential for manufacturers...the support of rank-aware query processing, has attracted much attention in the database research community. top-k queries (1)-(10) retrieve only the k objects that best match the...
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...study a new kind of top-k queries, probabilistic fuzzy top-k queries (pf-topk queries) which can return k results from uncertain objects for fuzzy query conditions...bounding functions, which answers fuzzy top-k queries over uncertain objects in high-dimensional query space efficiently. we also propose...
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...for which this product is in the top- k query result set? we identify a novel query type, namely reverse top-k query, that is essential for manufacturers...helps to understand the reverse top-k query conceptually. then, we study in more details the case of bichromatic reverse top- k query, which is more interesting for...
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...considering the complex uncertain database, top-kquery processing in uncertain databases is semantically and computationally different from classical top-kprocessing. score is not the...cpugpu cooperative computing framework to processing top-k queries in uncertain database. two parallel gpu algorithms are...
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...introduces novel polynomial algorithms for processing top-k queries in uncertain databases under the generally adopted model...the best known algorithms for top-k query processing in uncertain databases, in terms of both runtime and memory usage. in the single-alternative case, the...
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...polynomial-time al- gorithms for processing top-k queries in uncertain databases, under the generally adopted model...the best known algorithms for top-k query processing in uncertain databases, in terms of both running time...
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...their aggregate values and returns k groups with the highest aggregate values. however, compared to top-k in traditional databases, queries over uncertain database are more complicated because of...as a powerful semantic of top-k in uncertain database, global top-k return k highest-ranked tuples according to...
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top-k processing in uncertain databases is semantically and com- putationally...cesses new probabilistic formulations of top-k queries in uncertain databases. the new formulations are based...