Maverick: Discovering Exceptional Facts from Knowledge Graphs
Maverick: Discovering Exceptional Facts from Knowledge Graphs
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Maverick:从知识图中发现特殊事实
DOI:
10.1145/3183713.3183730
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Li, Chengkai
中科院分区:
文献类型:
--
作者:
Zhang, Gensheng;Jimenez, Damian;Li, Chengkai
We present Maverick, a general, extensible framework that discovers exceptional facts about entities in knowledge graphs. To the best of our knowledge, there was no previous study of the problem. We model an exceptional fact about an entity of interest as a context-subspace pair, in which a subspace is a set of attributes and a context is defined by a graph query pattern of which the entity is a match. The entity is exceptional among the entities in the context, with regard to the subspace. The search spaces of both patterns and subspaces are exponentially large. Maverick conducts beam search on the patterns which uses a match-based pattern construction method to evade the evaluation of invalid patterns. It applies two heuristics to select promising patterns to form the beam in each iteration. Maverick traverses and prunes the subspaces organized as a set enumeration tree by exploiting the upper bound properties of exceptionality scoring functions. Results of experiments and user studies using real-world datasets demonstrated substantial performance improvement of the proposed framework over the baselines as well as its effectiveness in discovering exceptional facts.
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DOI:
--
发表时间:
2011-10
期刊:
--
影响因子:
--
作者:
Sarah Cohen;Chengkai Li;Jun Yang;Cong Yu
通讯作者:
Sarah Cohen;Chengkai Li;Jun Yang;Cong Yu
DOI:
10.1145/2996453
发表时间:
2017
期刊:
ACM Transactions on Database Systems (TODS)
影响因子:
--
作者:
You Wu;P. Agarwal;Chengkai Li;Jun Yang;Cong Yu
通讯作者:
Cong Yu
DOI:
10.1145/2020408.2020601
发表时间:
2011-08
期刊:
--
影响因子:
--
作者:
Xiao Jiang;Chengkai Li;Ping Luo;Min Wang;Yong Yu
通讯作者:
Xiao Jiang;Chengkai Li;Ping Luo;Min Wang;Yong Yu
影响因子:
22.7
作者:
Vrandecic, Denny;Kroetzsch, Markus
通讯作者:
Kroetzsch, Markus
影响因子:
22.7
作者:
Cohen, Sarah;Hamilton, James T.;Turner, Fred
通讯作者:
Turner, Fred