arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.14866cs.IR
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基于球面优化的多面推荐网络

Multi-Facet Recommender Networks with Spherical Optimization

Yanchao Tan, Carl Yang, Xiangyu Wei, Yun Ma, Xiaolin Zheng

摘要:

隐式反馈在现代推荐系统中得到了广泛的研究。由于反馈通常是稀疏和不平衡的,它对用户和项目之间复杂交互的学习提出了很大的挑战。度量学习被提出来从隐式反馈中捕获用户-项目交互,但现有方法仅在单个度量空间中表示用户和项目,忽略了用户可以具有多个偏好和项目可以具有多个属性的事实,这导致潜在的冲突限制了它们在推荐中的性能。为了捕获用户偏好和项目属性的多个方面,同时解决其潜在的冲突,我们提出了新的框架,多方面推荐网络与球面优化(MARS)。通过设计一个跨方面的相似性度量,我们将用户和项目投影到多个度量空间中进行细粒度的表示学习,并只在适当的空间中进行比较。此外,我们设计了一个球形优化策略,以提高多方面的推荐框架的有效性和鲁棒性。在六个真实世界的基准数据集上进行的广泛实验显示,MARS带来了巨大的性能提升,在HR和nDCG指标方面,它不断实现比最先进的基线高出40%的改进。

英文摘要:

Implicit feedback is widely explored by modern recommender systems. Since the feedback is often sparse and imbalanced, it poses great challenges to the learning of complex interactions among users and items. Metric learning has been proposed to capture user-item interactions from implicit feedback, but existing methods only represent users and items in a single metric space, ignoring the fact that users can have multiple preferences and items can have multiple properties, which leads to potential conflicts limiting their performance in recommendation. To capture the multiple facets of user preferences and item properties while resolving their potential conflicts, we propose the novel framework of Multi-fAcet Recommender networks with Spherical optimization (MARS). By designing a cross-facet similarity measurement, we project users and items into multiple metric spaces for fine-grained representation learning, and compare them only in the proper spaces. Furthermore, we devise a spherical optimization strategy to enhance the effectiveness and robustness of the multi-facet recommendation framework. Extensive experiments on six real-world benchmark datasets show drastic performance gains brought by MARS, which constantly achieves up to 40\% improvements over the state-of-the-art baselines regarding both HR and nDCG metrics.

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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