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Sequential recommender systems rank relevant items by modeling a user's interaction history and computing the inner product between the resulting user representation and stored item embeddings. To avoid the significant memory overhead of…

There is a rapidly-growing research interest in modeling user preferences via pre-training multi-domain interactions for recommender systems. However, Existing pre-trained multi-domain recommendations mostly select the item texts to be…

Information Retrieval · Computer Science 2023-11-06 Wenqi Sun , Ruobing Xie , Shuqing Bian , Wayne Xin Zhao , Jie Zhou

Item representation learning (IRL) plays an essential role in recommender systems, especially for sequential recommendation. Traditional sequential recommendation models usually utilize ID embeddings to represent items, which are not shared…

Information Retrieval · Computer Science 2023-12-22 Shenghao Yang , Chenyang Wang , Yankai Liu , Kangping Xu , Weizhi Ma , Yiqun Liu , Min Zhang , Haitao Zeng , Junlan Feng , Chao Deng

Recent advances in deep forecasting models have achieved remarkable performance, yet most approaches still struggle to provide both accurate predictions and interpretable insights into temporal dynamics. This paper proposes CaReTS, a novel…

Machine Learning · Computer Science 2025-11-14 Fulong Yao , Wanqing Zhao , Chao Zheng , Xiaofei Han

Session-based recommendation (SBR) aims to capture dynamic user preferences by analyzing item sequences within individual sessions. However, most existing approaches focus mainly on intra-session item relationships, neglecting the…

Information Retrieval · Computer Science 2025-05-28 Wooseong Yang , Chen Wang , Zihe Song , Weizhi Zhang , Philip S. Yu

Transformer-based architectures are widely adopted in sequential recommendation systems, yet their application in Financial Services (FS) presents distinct practical and modeling challenges for real-time recommendation. These include:a)…

Machine Learning · Computer Science 2025-11-20 Dwipam Katariya , Snehita Varma , Akshat Shreemali , Benjamin Wu , Kalanand Mishra , Pranab Mohanty

Graph neural networks (GNNs) have revolutionized recommender systems by effectively modeling complex user-item interactions, yet data sparsity and the item cold-start problem significantly impair performance, particularly for new items with…

Machine Learning · Computer Science 2026-03-04 Jialin Liu , Zhaorui Zhang , Ray C. C. Cheung

Modern DNN-based recommendation systems rely on training-derived embeddings of sparse features. Input sparsity makes obtaining high-quality embeddings for rarely-occurring categories harder as their representations are updated infrequently.…

Machine Learning · Computer Science 2023-09-29 Zihao Deng , Benjamin Ghaemmaghami , Ashish Kumar Singh , Benjamin Cho , Leo Orshansky , Mattan Erez , Michael Orshansky

Click-Through Rate (CTR) prediction on cold users is a challenging task in recommender systems. Recent researches have resorted to meta-learning to tackle the cold-user challenge, which either perform few-shot user representation learning…

Information Retrieval · Computer Science 2022-10-31 Yanyan Shen , Lifan Zhao , Weiyu Cheng , Zibin Zhang , Wenwen Zhou , Kangyi Lin

In e-commerce, where users face a vast array of possible item choices, recommender systems are vital for helping them discover suitable items they might otherwise overlook. While many recommender systems primarily rely on a user's purchase…

Information Retrieval · Computer Science 2025-08-29 Kyungho Kim , Sunwoo Kim , Geon Lee , Kijung Shin

Transformer-based recommender systems, such as BERT4Rec or SASRec, achieve state-of-the-art results in sequential recommendation. However, it is challenging to use these models in production environments with catalogues of millions of…

Information Retrieval · Computer Science 2024-08-20 Aleksandr V. Petrov , Craig Macdonald , Nicola Tonellotto

Long-term user engagement (LTE) optimization in sequential recommender systems (SRS) is shown to be suited by reinforcement learning (RL) which finds a policy to maximize long-term rewards. Meanwhile, RL has its shortcomings, particularly…

Information Retrieval · Computer Science 2023-05-09 Xiong-Hui Chen , Bowei He , Yang Yu , Qingyang Li , Zhiwei Qin , Wenjie Shang , Jieping Ye , Chen Ma

Tabular Foundation Models have recently established the state of the art in supervised tabular learning, by leveraging pretraining to learn generalizable representations of numerical and categorical structured data. However, they lack…

The lack of training data gives rise to the system cold-start problem in recommendation systems, making them struggle to provide effective recommendations. To address this problem, Large Language Models (LLMs) can model recommendation tasks…

Information Retrieval · Computer Science 2024-12-25 Wenlin Zhang , Chuhan Wu , Xiangyang Li , Yuhao Wang , Kuicai Dong , Yichao Wang , Xinyi Dai , Xiangyu Zhao , Huifeng Guo , Ruiming Tang

Repeat consumption, such as repurchasing items and relistening songs, is a common scenario in daily life. To model repeat consumption, the repeat-aware recommendation has been proposed to predict which item will be re-interacted based on…

Information Retrieval · Computer Science 2025-06-11 Shigang Quan , Shui Liu , Zhenzhe Zheng , Fan Wu

Deep neural networks are widely used in personalized recommendation systems. Unlike regular DNN inference workloads, recommendation inference is memory-bound due to the many random memory accesses needed to lookup the embedding tables. The…

In recent years, sequential recommender systems (SRSs) and session-based recommender systems (SBRSs) have emerged as a new paradigm of RSs to capture users' short-term but dynamic preferences for enabling more timely and accurate…

Information Retrieval · Computer Science 2022-05-24 Shoujin Wang , Qi Zhang , Liang Hu , Xiuzhen Zhang , Yan Wang , Charu Aggarwal

Transformer-based sequential recommenders are very powerful for capturing both short-term and long-term sequential item dependencies. This is mainly attributed to their unique self-attention networks to exploit pairwise item-item…

Information Retrieval · Computer Science 2022-12-09 Huiyuan Chen , Yusan Lin , Menghai Pan , Lan Wang , Chin-Chia Michael Yeh , Xiaoting Li , Yan Zheng , Fei Wang , Hao Yang

In the one-class recommendation problem, it's required to make recommendations basing on users' implicit feedback, which is inferred from their action and inaction. Existing works obtain representations of users and items by encoding…

Information Retrieval · Computer Science 2024-01-22 Chu-Jen Shao , Hao-Ming Fu , Pu-Jen Cheng

Transformer-based approaches such as BERT4Rec and SASRec demonstrate strong performance in Next Item Recommendation (NIR) tasks. However, applying these architectures to Next-Basket Recommendation (NBR) tasks, which often involve highly…

Information Retrieval · Computer Science 2024-12-23 Oleg Lashinin , Denis Krasilnikov , Aleksandr Milogradskii , Marina Ananyeva