Efficient k-Regret Query Algorithm with Restriction-free Bound for any Dimensionality
Efficient k-Regret Query Algorithm with Restriction-free Bound for any Dimensionality
复制标题
任意维度无限制边界的高效 k-Regret 查询算法
DOI:
10.1145/3183713.3196903
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发表时间:
2018-05
期刊:
影响因子:
--
通讯作者:
Ashwin Lall
中科院分区:
文献类型:
--
作者:
Min Xie;Raymond Chi Wing Wong;Jian Li;Cheng Long;Ashwin Lall
Extracting interesting tuples from a large database is an important problem in multi-criteria decision making. Two representative queries were proposed in the literature: top- k queries and skyline queries. A top- k query requires users to specify their utility functions beforehand and then returns k tuples to the users. A skyline query does not require any utility function from users but it puts no control on the number of tuples returned to users. Recently, a k-regret query was proposed and received attention from the community because it does not require any utility function from users and the output size is controllable, and thus it avoids those deficiencies of top- k queries and skyline queries. Specifically, it returns k tuples that minimize a criterion called the maximum regret ratio . In this paper, we present the lower bound of the maximum regret ratio for the k -regret query. Besides, we propose a novel algorithm, called SPHERE, whose upper bound on the maximum regret ratio is asymptotically optimal and restriction-free for any dimensionality, the best-known result in the literature. We conducted extensive experiments to show that SPHERE performs better than the state-of-the-art methods for the k -regret query.
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DOI:
10.1016/j.is.2008.04.004
发表时间:
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期刊:
Inf. Syst.
影响因子:
--
作者:
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通讯作者:
Jongwuk Lee;Gae-won You;Seung-won Hwang
影响因子:
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DOI:
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发表时间:
2008-04
期刊:
2008 IEEE 24th International Conference on Data Engineering
影响因子:
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影响因子:
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DOI:
10.1109/sfcs.1992.267805
发表时间:
1992-10
期刊:
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影响因子:
--
作者:
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