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标题: "TimeRoute: Time-Aware Modality Routing and Diffusion for Multi-Modal Recommendation"
原文链接: "https://arxiv.org/abs/2608.10983"
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## Computer Science > Information Retrieval

## Title:TimeRoute: Time-Aware Modality Routing and Diffusion for Multi-Modal Recommendation

Authors:[Pengyu Zhang](https://arxiv.org/search/cs?searchtype=author&query=Zhang,+P), [Yangqin Jiang](https://arxiv.org/search/cs?searchtype=author&query=Jiang,+Y), [Klim Zaporojets](https://arxiv.org/search/cs?searchtype=author&query=Zaporojets,+K), [Congfeng Cao](https://arxiv.org/search/cs?searchtype=author&query=Cao,+C), [Paul Groth](https://arxiv.org/search/cs?searchtype=author&query=Groth,+P)

[View PDF](https://arxiv.org/pdf/2608.10983) [HTML (experimental)](https://arxiv.org/html/2608.10983v1)

> Abstract:Multi-modal recommenders fuse collaborative signals with item modalities such as text, images, and audio, but the usefulness of each drifts over time and at different rates. For example, chocolate purchases typically guided by textual ingredient cues can shift toward visual packaging and ambient audio around Valentine's Day. This modality time-scale mismatch gives rise to two coupled challenges: (1) users require different modality proportions across temporal contexts, and (2) less relevant modalities are more likely to introduce outdated or misleading signals into the recommender. We address both challenges within a unified diffusion-based recommender, TimeRoute. A temporal-aware modal router maps each user's aggregated behavioral features to a personalized modality distribution, replacing the globally shared fusion weights used in prior work. The diffusion-based graph reconstructor is then conditioned on the same temporal profile through Feature-wise Linear Modulation (FiLM) with dual-stream long- and short-term denoising heads, suppressing outdated modality edges before they enter the propagation graph. Experiments on TikTok, Amazon-Baby, and Amazon-Sports demonstrate consistent improvements of up to 9.8\\% in Recall@K, Precision@K, and NDCG@K over strong baselines across 10-seed paired tests. Code is available at [this https URL](https://anonymous.4open.science/r/TimeRoute).

| Subjects: | Information Retrieval (cs.IR); Artificial Intelligence (cs.AI) |
| --- | --- |
| Cite as: | [arXiv:2608.10983](https://arxiv.org/abs/2608.10983) \[cs.IR\] |
|  | (or [arXiv:2608.10983v1](https://arxiv.org/abs/2608.10983v1) \[cs.IR\] for this version) |
|  | [https://doi.org/10.48550/arXiv.2608.10983](https://doi.org/10.48550/arXiv.2608.10983) |

## Submission history

From: Pengyu Zhang \[[view email](https://arxiv.org/show-email/a0562d8b/2608.10983)\]  
**\[v1\]** Tue, 11 Aug 2026 14:36:30 UTC (459 KB)

[Which authors of this paper are endorsers?](https://arxiv.org/auth/show-endorsers/2608.10983) | Disable MathJax ([What is MathJax?](https://info.arxiv.org/help/mathjax.html))
