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arXiv 2208.02438cs.IR
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基于图扩散的稀疏专家推荐简化算法

Simplifying Sparse Expert Recommendation by Revisiting Graph Diffusion

Vaibhav Krishna, Nino Antulov-Fantulin

摘要:

社区问答(CQA)网站已经成为有价值的知识库,个人通过提问和回答问题来交换信息。随着问题数量的不断增加和用户在社区内外的大量迁移,一个关键的挑战是设计有效的策略来推荐专家解决新问题。在本文中,我们提出了一个简单的图扩散专家推荐模型CQA,可以超越最先进的深度学习代表和协作模型。我们所提出的方法学习用户的专业知识,在语义和时间信息的背景下,捕捉他们不断变化的兴趣和活动水平随着时间的推移。在来自Stack Exchange网络的五个真实数据集上的实验表明,我们的方法优于有竞争力的基线方法。此外,对冷启动用户(具有有限历史记录的用户)的实验表明,与最佳基线方法相比,我们的模型实现了平均约30%的性能增益。

英文摘要:

Community Question Answering (CQA) websites have become valuable knowledge repositories where individuals exchange information by asking and answering questions. With an ever-increasing number of questions and high migration of users in and out of communities, a key challenge is to design effective strategies for recommending experts for new questions. In this paper, we propose a simple graph-diffusion expert recommendation model for CQA, that can outperform state-of-the art deep learning representatives and collaborative models. Our proposed method learns users' expertise in the context of both semantic and temporal information to capture their changing interest and activity levels with time. Experiments on five real-world datasets from the Stack Exchange network demonstrate that our approach outperforms competitive baseline methods. Further, experiments on cold-start users (users with a limited historical record) show our model achieves an average of ~ 30% performance gain compared to the best baseline method.

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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