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arXiv 1104.3219cs.SI
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基于熟人约束的社会时态组查询

On Social-Temporal Group Query with Acquaintance Constraint

De-Nian Yang, Yi-Ling Chen, Wang-Chien Lee, Ming-Syan Chen

摘要:

三个基本标准对于活动规划是重要的,包括:(1)找到一组熟悉发起者的参与者,(2)确保组中的每个参与者与组中的大多数成员有紧密的社交关系,以及(3)选择可供所有参与者使用的活动时段。因此,本文提出了社会-时间组查询,以找到活动时间和参与者与最小的总社会距离的发起者。此外,该查询结合了熟人约束,以避免找到具有相互不熟悉的与会者的组。有效地处理社会时态组查询是非常具有挑战性的。通过证明证明该问题是NP-难的,并利用可编程语言将该问题形式化。然后,我们提出了两个有效的算法,SGSelect和STGSelect,其中包括有效的修剪技术,并采用枢轴时隙的想法,以大大减少运行时间,找到最优的解决方案。实验结果表明,该算法具有更高的效率和可扩展性。在解决方案的质量比较,我们表明,STGSelect优于由发起人代表手动协调的算法。

英文摘要:

Three essential criteria are important for activity planning, including: (1) finding a group of attendees familiar with the initiator, (2) ensuring each attendee in the group to have tight social relations with most of the members in the group, and (3) selecting an activity period available for all attendees. Therefore, this paper proposes Social-Temporal Group Query to find the activity time and attendees with the minimum total social distance to the initiator. Moreover, this query incorporates an acquaintance constraint to avoid finding a group with mutually unfamiliar attendees. Efficient processing of the social-temporal group query is very challenging. We show that the problem is NP-hard via a proof and formulate the problem with Integer Programming. We then propose two efficient algorithms, SGSelect and STGSelect, which include effective pruning techniques and employ the idea of pivot time slots to substantially reduce the running time, for finding the optimal solutions. Experimental results indicate that the proposed algorithms are much more efficient and scalable. In the comparison of solution quality, we show that STGSelect outperforms the algorithm that represents manual coordination by the initiator.

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