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In the past decade, deep learning (DL) models have gained prominence for their exceptional accuracy on benchmark datasets in recommender systems (RecSys). However, their evaluation has primarily relied on offline metrics, overlooking direct…

Information Retrieval · Computer Science 2024-05-03 Ruixuan Sun , Xinyi Wu , Avinash Akella , Ruoyan Kong , Bart Knijnenburg , Joseph A. Konstan

The essence of sequential recommender systems (RecSys) lies in understanding how users make decisions. Most existing approaches frame the task as sequential prediction based on users' historical purchase records. While effective in…

Information Retrieval · Computer Science 2024-09-11 Xiaoyu Liu , Jiaxin Yuan , Yuhang Zhou , Jingling Li , Furong Huang , Wei Ai

Multimodal recommender systems leverage diverse data sources, such as user interactions, content features, and contextual information, to address challenges like cold-start and data sparsity. However, existing methods often suffer from one…

Information Retrieval · Computer Science 2026-02-24 Adamya Shyam , Venkateswara Rao Kagita , Bharti Rana , Vikas Kumar

The extensive world knowledge and powerful reasoning capabilities of large language models (LLMs) have attracted significant attention in recommendation systems (RS). Specifically, The chain of thought (CoT) has been shown to improve the…

Information Retrieval · Computer Science 2025-08-22 Yu Xia , Rui Zhong , Zeyu Song , Wei Yang , Junchen Wan , Qingpeng Cai , Chi Lu , Peng Jiang

Deep learning and symbolic learning are two frequently employed methods in Sequential Recommendation (SR). Recent neural-symbolic SR models demonstrate their potential to enable SR to be equipped with concurrent perception and cognition…

Artificial Intelligence · Computer Science 2023-05-16 Huanhuan Yuan , Pengpeng Zhao , Xuefeng Xian , Guanfeng Liu , Victor S. Sheng , Lei Zhao

Owing to their powerful semantic reasoning capabilities, Large Language Models (LLMs) have been effectively utilized as recommenders, achieving impressive performance. However, the high inference latency of LLMs significantly restricts…

Information Retrieval · Computer Science 2024-08-21 Yu Cui , Feng Liu , Pengbo Wang , Bohao Wang , Heng Tang , Yi Wan , Jun Wang , Jiawei Chen

While Large Language Models (LLMs) demonstrate exceptional performance in surface-level text generation, their nature in handling complex multi-step reasoning tasks often remains one of ``statistical fitting'' rather than systematic logical…

Machine Learning · Computer Science 2026-01-27 Lianlei Shan , Han Chen , Yixuan Wang , Zhenjie Liu , Wei Li

While large language models (LLMs) demonstrate emerging reasoning capabilities, current inference-time expansion methods incur prohibitive computational costs by exhaustive sampling. Through analyzing decoding trajectories, we observe that…

Artificial Intelligence · Computer Science 2026-02-03 Ziheng Li , Hengyi Cai , Xiaochi Wei , Yuchen Li , Shuaiqiang Wang , Zhi-Hong Deng , Dawei Yin

Decision Transformer (DT) is an innovative algorithm leveraging recent advances of the transformer architecture in reinforcement learning (RL). However, a notable limitation of DT is its reliance on recalling trajectories from datasets,…

Machine Learning · Computer Science 2023-11-02 Yi Ma , Chenjun Xiao , Hebin Liang , Jianye Hao

Learning control policies to perform complex robotics tasks from human preference data presents significant challenges. On the one hand, the complexity of such tasks typically requires learning policies to perform a variety of subtasks,…

Machine Learning · Computer Science 2025-01-03 Utsav Singh , Souradip Chakraborty , Wesley A. Suttle , Brian M. Sadler , Vinay P Namboodiri , Amrit Singh Bedi

Sequential recommendation requires the recommender to capture the evolving behavior characteristics from logged user behavior data for accurate recommendations. However, user behavior sequences are viewed as a script with multiple ongoing…

Information Retrieval · Computer Science 2022-06-15 Zhiyu Yao , Xinyang Chen , Sinan Wang , Qinyan Dai , Yumeng Li , Tanchao Zhu , Mingsheng Long

Traditional recommender systems such as matrix factorization methods have primarily focused on learning a shared dense embedding space to represent both items and user preferences. Subsequently, sequence models such as RNN, GRUs, and,…

Information Retrieval · Computer Science 2024-08-27 Yaoyiran Li , Xiang Zhai , Moustafa Alzantot , Keyi Yu , Ivan Vulić , Anna Korhonen , Mohamed Hammad

Conventional sequential recommendation models have achieved remarkable success in mining implicit behavioral patterns. However, these architectures remain structurally blind to explicit user intent: they struggle to adapt when a user's…

Information Retrieval · Computer Science 2026-03-06 Fuyuan Lyu , Chenglin Luo , Qiyuan Zhang , Yupeng Hou , Haolun Wu , Xing Tang , Xue Liu , Jin L. C. Guo , Xiuqiang He

Recent advancements in diffusion models have shown promising results in sequential recommendation (SR). Existing approaches predominantly rely on implicit conditional diffusion models, which compress user behaviors into a single…

Information Retrieval · Computer Science 2025-03-19 Hongtao Huang , Chengkai Huang , Tong Yu , Xiaojun Chang , Wen Hu , Julian McAuley , Lina Yao

Referring Expression Comprehension (REC) is one of the most important tasks in visual reasoning that requires a model to detect the target object referred by a natural language expression. Among the proposed pipelines, the one-stage…

Computer Vision and Pattern Recognition · Computer Science 2022-10-28 Zhipeng Zhang , Zhimin Wei , Zhongzhen Huang , Rui Niu , Peng Wang

Although Long Reasoning Models (LRMs) have achieved superior performance on various reasoning scenarios, they often suffer from increased computational costs and inference latency caused by overthinking. To address these limitations, we…

Artificial Intelligence · Computer Science 2025-10-15 Yujian Zhang , Keyu Chen , Zhifeng Shen , Ruizhi Qiao , Xing Sun

Hierarchical reinforcement learning (HRL) enables agents to solve complex, long-horizon tasks by decomposing them into manageable sub-tasks. However, HRL methods face two fundamental challenges: (i) non-stationarity caused by the evolving…

Conversational recommender systems (CRS) dynamically obtain the user preferences via multi-turn questions and answers. The existing CRS solutions are widely dominated by deep reinforcement learning algorithms. However, deep reinforcement…

Information Retrieval · Computer Science 2022-09-01 A S M Ahsan-Ul Haque , Hongning Wang

Deep reinforcement learning (DRL) has demonstrated its potential in solving complex manufacturing decision-making problems, especially in a context where the system learns over time with actual operation in the absence of training data. One…

Machine Learning · Computer Science 2023-04-14 Miguel Neves , Pedro Neto

We propose AdaRec, a few-shot in-context learning framework that leverages large language models for an adaptive personalized recommendation. AdaRec introduces narrative profiling, transforming user-item interactions into natural language…

Computation and Language · Computer Science 2025-11-11 Meiyun Wang , Charin Polpanumas