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arXiv 2606.02417cs.IR
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动态谱去噪与全局上下文注意力在多行为推荐中的应用

Dynamic Spectral Denoising with Global-Context Attention for Multi-Behavior Recommendation

National University of Singapore(新加坡国立大学);Singapore Management University(新加坡管理大学);Hefei University of Technology(合肥工业大学);University of Science and Technology of China(中国科学技术大学)

Miaomiao Cai, Yunshan Ma, Fangqi Zhu, Junfeng Fang, Zhijie Zhang, Zhiyong Cheng, Xiang Wang, See-Kiong Ng

AI总结:

针对多行为推荐中行为依赖噪声和异质性导致的表示级瓶颈,提出动态特征级谱滤波和全局上下文注意力融合的SpectraMB模型,实现表示净化与可靠性感知融合。

摘要:

多行为推荐通过利用异构的辅助反馈(例如,浏览、收藏和加购)来改进目标行为预测,但其鲁棒性受到行为依赖的噪声和不一致性的损害。我们认为关键瓶颈是由两种耦合的异质性导致的表示级失败。首先,当多跳传播在嵌入空间中将偶然信号与真实偏好混合时,会产生行为内表示纠缠,使得粗粒度的空间去噪无法在不牺牲信息性小众信号的情况下抑制噪声。其次,行为间可靠性异质性使跨行为融合复杂化,因为辅助行为的预测价值因用户和上下文而异。没有可靠性校准,频繁但不可靠的信号可能主导聚合并导致目标意图漂移。为了解决这一瓶颈,我们提出了动态谱去噪与全局上下文注意力用于多行为推荐(SpectraMB),这是一个目标导向的模型,在可靠性感知融合之前执行表示净化。SpectraMB引入了动态特征级谱滤波,它将嵌入沿特征维度重新参数化到特征-频率空间,并在目标监督下学习视图自适应的谱调制,从而无需手工设计的频率假设即可实现分量级净化。它还提出了全局上下文注意力融合,使用净化后的全局表示作为上下文锚点来评估视图兼容性并执行可靠性感知聚合,同时残差全局骨干保留协作结构。在三个真实世界数据集上的大量实验表明,SpectraMB在大多数评估设置中取得了最佳结果,并在噪声交互下表现出改进的鲁棒性。

英文摘要:

Multi-behavior recommendation improves target-behavior prediction by exploiting heterogeneous auxiliary feedback (e.g., view, collect, and cart), yet its robustness is undermined by behavior-dependent noise and inconsistency. We argue that the key bottleneck is a representation-level failure caused by two coupled heterogeneities. First, intra-behavior representation entanglement arises when multi-hop propagation blends incidental signals with true preferences in the embedding space, making coarse spatial denoising unable to suppress noise without sacrificing informative niche signals. Second, inter-behavior reliability heterogeneity complicates cross-behavior fusion because the predictive value of auxiliary behaviors varies across users and contexts. Without reliability calibration, frequent yet unreliable signals may dominate aggregation and cause target-intent drift. To address this bottleneck, we propose Dynamic Spectral Denoising with Global-Context Attention for Multi-Behavior Recommendation (SpectraMB), a target-oriented model that performs representation purification before reliability-aware fusion. SpectraMB introduces Dynamic Feature-Level Spectral Filtering, which re-parameterizes embeddings along the feature dimension into a feature-frequency space and learns view-adaptive spectral modulation under target supervision, enabling component-wise purification without hand-crafted frequency assumptions. It further proposes Global-Context Attention Fusion, which uses a purified global representation as a context anchor to assess view compatibility and perform reliability-aware aggregation, while a residual global backbone preserves collaborative structure. Extensive experiments on three real-world datasets show that SpectraMB achieves the best results in most evaluation settings and exhibits improved robustness under noisy interactions.

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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