arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2006.08893cs.SIcs.IR
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社交网络中的智能群体事件推荐系统

An Intelligent Group Event Recommendation System in Social networks

Guoqiong Liao, Xiaomei Huang, Neal N. Xiong, Changxuan Wan

摘要:

背景的重要性已被广泛认可的个人推荐系统。然而,大多数现有的基于事件的社交网络(EBSNs)中的群体推荐模型关注于如何聚合群体成员的偏好以形成群体偏好。在这些模型中,虽然考虑了情境对群体的影响,但只是简单地以手动方式定义,无法模拟情境与群体之间复杂而深入的交互。在本文中,我们提出了一个基于注意力的上下文感知的组事件推荐模型(ACGER)EBSN。ACGER通过多层神经网络对上下文对用户、组和事件的深层非线性影响进行建模。特别地,设计了一种新的注意力机制,使得上下文对用户/组的影响权重随着事件的发生而动态变化。考虑到群体可能具有与群体成员完全不同的行为模式,我们提出需要从间接和直接两个角度(分别称为间接偏好和直接偏好)来获得群体的偏好。为了获得间接偏好,提出了一种基于注意力机制的偏好聚集方法。与已有的预定义策略相比,该方法可以根据群组关注的事件灵活地调整策略。为了获得直接的偏好,我们采用神经网络直接学习它从群体事件的相互作用。此外,为了充分利用EBSN中丰富的用户-事件交互,我们将上下文感知的个人推荐任务集成到ACGER中,从而提高了用户嵌入和事件嵌入学习的准确性。在Meetings的两个真实数据集上进行的大量实验表明,我们的模型ACGER显着优于最先进的模型。

英文摘要:

The importance of contexts has been widely recognized in recommender systems for individuals. However, most existing group recommendation models in Event-Based Social Networks (EBSNs) focus on how to aggregate group members' preferences to form group preferences. In these models, the influence of contexts on groups is considered but simply defined in a manual way, which cannot model the complex and deep interactions between contexts and groups. In this paper, we propose an Attention-based Context-aware Group Event Recommendation model (ACGER) in EBSNs. ACGER models the deep, non-linear influence of contexts on users, groups, and events through multi-layer neural networks. Especially, a novel attention mechanism is designed to enable the influence weights of contexts on users/groups change dynamically with the events concerned. Considering that groups may have completely different behavior patterns from group members, we propose that the preference of a group need to be obtained from indirect and direct perspectives (called indirect preference and direct preference respectively). In order to obtain the indirect preference, we propose a method of aggregating preferences based on attention mechanism. Compared with existing predefined strategies, this method can flexibly adapt the strategy according to the events concerned by the group. In order to obtain the direct preference, we employ neural networks to directly learn it from group-event interactions. Furthermore, to make full use of rich user-event interactions in EBSNs, we integrate the context-aware individual recommendation task into ACGER, which enhances the accuracy of learning of user embeddings and event embeddings. Extensive experiments on two real datasets from Meetup show that our model ACGER significantly outperforms the state-of-the-art models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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