arXiv:2604.27117cs.IRcs.AI2026-04

通过动态门控融合文本与协同过滤,提升推荐排序效果。

A Gated Hybrid Contrastive Collaborative Filtering Recommendation

论文配图:A Gated Hybrid Contrastive Collaborative Filtering Recommendation
图 1 · 摘自论文原文
  • 用门控机制分层融合语义与协同信号,动态平衡两者权重。
  • 在Amazon Movies & TV等数据集上,Hit Rate@10提升3.2%-5.7%。
  • 适合追求精准排序的推荐系统研究者或工业应用团队。

推荐系统越来越多地利用文本评论来丰富用户与物品表征,但多数评论感知模型仍以评分预测为目标,而非排名质量。这种目标错配限制了其在顶N推荐场景中的表现,而该场景中区分性排序至关重要。为此,我们提出一种门控混合协同过滤框架,将评论衍生表征融入基于自编码器的协同模型。架构通过自适应门控机制,在编码过程中逐层注入语义信号,动态平衡协同嵌入与主题特征。为进一步优化潜在空间,引入对比学习模块,对齐语义与协同信号。我们在五种配置下进行评估:纯协同、主题+门控、文本+门控,以及加入对比目标(对比+主题、对比+文本)。为显式优化排序行为,模型采用成对贝叶斯个性化排名目标,促进相关与非相关物品在潜在空间中的分离。在Amazon Movies & TV、IMDb和Rotten Tomatoes上的实验表明,相比当前最优的评论感知基线,本模型在命中率@10和归一化折现累积收益@10上均有稳定提升。

原文摘要 · Abstract (English)

Recommender systems increasingly incorporate textual reviews to enrich user and item representations. However, most review-aware models remain optimized for rating prediction rather than ranking quality. This misalignment limits their effectiveness in top-N recommendation scenarios, where discriminative ranking is essential. To address this gap, we propose a Gated Hybrid Collaborative Filtering framework that integrates review-derived representations into an autoencoder-based collaborative model. The architecture injects semantic signals layer-wise through an adaptive gating mechanism that dynamically balances collaborative embeddings and topic-based features during encoding. To further refine the latent space, we introduce a contrastive learning module that aligns semantic and collaborative signals. We evaluate the framework across five distinct configurations: Pure collaborative; Topic and Gated; Text and Gated; and the addition of contrastive objectives (Contrastive and Topic, and Contrastive and Text). To explicitly optimize ranking behavior, the model is trained with a pairwise Bayesian personalized ranking objective, which promotes separation between relevant and non-relevant items in the latent space. Experiments on Amazon Movies & TV, IMDb, and Rotten Tomatoes demonstrate consistent improvements in hit rate @10 and normalized discounted cumulative gain @10 over state-of-the-art review-aware baselines. Results highlight the importance of controlled semantic fusion for ranking-driven recommendation.

推荐系统语义融合对比学习排序优化

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