Search Results for author: Riwei Lai

Found 4 papers, 3 papers with code

Matryoshka Representation Learning for Recommendation

1 code implementation11 Jun 2024 Riwei Lai, Li Chen, Weixin Chen, Rui Chen

In this paper, we introduce a novel matryoshka representation learning method for recommendation (MRL4Rec), by which we restructure user and item vectors into matryoshka representations with incrementally dimensional and overlapping vector spaces to explicitly represent user preferences and item features at different hierarchical levels.

Recommendation Systems Representation Learning

A Survey on Data-Centric Recommender Systems

no code implementations31 Jan 2024 Riwei Lai, Rui Chen, Chi Zhang

Recommender systems (RSs) have become an essential tool for mitigating information overload in a range of real-world applications.

Recommendation Systems Survey

Adaptive Hardness Negative Sampling for Collaborative Filtering

1 code implementation10 Jan 2024 Riwei Lai, Rui Chen, Qilong Han, Chi Zhang, Li Chen

Negative sampling is essential for implicit collaborative filtering to provide proper negative training signals so as to achieve desirable performance.

Collaborative Filtering

Augmented Negative Sampling for Collaborative Filtering

1 code implementation11 Aug 2023 Yuhan Zhao, Rui Chen, Riwei Lai, Qilong Han, Hongtao Song, Li Chen

To balance efficiency and effectiveness, the vast majority of existing methods follow the two-pass approach, in which the first pass samples a fixed number of unobserved items by a simple static distribution and then the second pass selects the final negative items using a more sophisticated negative sampling strategy.

Collaborative Filtering

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