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Modern large-scale recommendation systems rely heavily on user interaction history sequences to enhance the model performance. The advent of large language models and sequential modeling techniques, particularly transformer-like…

Information Retrieval · Computer Science 2026-03-27 Zhimin Chen , Chenyu Zhao , Ka Chun Mo , Yunjiang Jiang , Jane H. Lee , Khushhall Chandra Mahajan , Ning Jiang , Kai Ren , Jinhui Li , Wen-Yun Yang

This study focuses on the problem of path modeling in heterogeneous information networks and proposes a multi-hop path-aware recommendation framework. The method centers on multi-hop paths composed of various types of entities and…

Information Retrieval · Computer Science 2025-05-12 Hongye Zheng , Yue Xing , Lipeng Zhu , Xu Han , Junliang Du , Wanyu Cui

In large-scale industrial recommendation systems, retrieval must produce high-quality candidates from massive corpora under strict latency. Recently, Generative Retrieval (GR) has emerged as a viable alternative to Embedding-Based Retrieval…

Information Retrieval · Computer Science 2026-01-27 Zhongchao Yi , Kai Feng , Xiaojian Ma , Yalong Wang , Yongqi Liu , Han Li , Zhengyang Zhou , Yang Wang

As an intelligent infrastructure connecting users with commercial content, advertising recommendation systems play a central role in information flow and value creation within the digital economy. However, existing multi-stage advertising…

In order to develop effective sequential recommenders, a series of sequence representation learning (SRL) methods are proposed to model historical user behaviors. Most existing SRL methods rely on explicit item IDs for developing the…

Information Retrieval · Computer Science 2022-06-14 Yupeng Hou , Shanlei Mu , Wayne Xin Zhao , Yaliang Li , Bolin Ding , Ji-Rong Wen

Recent years have witnessed the remarkable success of recommendation systems (RSs) in alleviating the information overload problem. As a new paradigm of RSs, session-based recommendation (SR) specializes in users' short-term preference…

Information Retrieval · Computer Science 2025-07-15 Zihao Li , Chao Yang , Yakun Chen , Xianzhi Wang , Hongxu Chen , Guandong Xu , Lina Yao , Quan Z. Sheng

Large Language Models (LLMs) as autonomous agents are increasingly tasked with solving complex, long-horizon problems. Aligning these agents via preference-based offline methods like Direct Preference Optimization (DPO) is a promising…

Machine Learning · Computer Science 2026-03-03 Heyang Gao , Zexu Sun , Erxue Min , Hengyi Cai , Shuaiqiang Wang , Dawei Yin , Xu Chen

Session-based recommendation (SBR) is a challenging task, which aims at recommending items based on anonymous behavior sequences. Almost all the existing solutions for SBR model user preference only based on the current session without…

Information Retrieval · Computer Science 2021-06-10 Ziyang Wang , Wei Wei , Gao Cong , Xiao-Li Li , Xian-Ling Mao , Minghui Qiu

While many production-ready and robust algorithms are available for the task of recommendation systems, many of these systems do not take the order of user's consumption into account. The order of consumption can be very useful and matters…

Information Retrieval · Computer Science 2022-05-03 Mehdi Soleiman Nejad , Meysam Varasteh , Hadi Moradi , Mohammad Amin Sadeghi

Cross-domain sequential recommendation (CDSR) alleviates interaction sparsity by jointly modeling user behaviors across multiple domains. While current studies have made some progresses, they still neglect two issues that severely impact…

Information Retrieval · Computer Science 2026-05-05 Zhida Qin , Zemu Liu , Haoyan Fu , Chong Zhang , Tianyu Huang , Yidong Li , Gangyi Ding

Generative query suggestion using large language models offers a powerful way to enhance conversational systems, but aligning outputs with nuanced user preferences remains a critical challenge. To address this, we introduce a multi-stage…

Computation and Language · Computer Science 2025-12-16 Junhao Yin , Haolin Wang , Peng Bao , Ju Xu , Yongliang Wang

Transformer-based models have gained significant traction in sequential recommender systems (SRSs) for their ability to capture user-item interactions effectively. However, these models often suffer from high computational costs and slow…

Information Retrieval · Computer Science 2025-04-15 Sheng Zhang , Maolin Wang , Wanyu Wang , Jingtong Gao , Xiangyu Zhao , Yu Yang , Xuetao Wei , Zitao Liu , Tong Xu

The self-attention mechanism, which equips with a strong capability of modeling long-range dependencies, is one of the extensively used techniques in the sequential recommendation field. However, many recent studies represent that current…

Information Retrieval · Computer Science 2023-05-18 Xinyu Du , Huanhuan Yuan , Pengpeng Zhao , Jianfeng Qu , Fuzhen Zhuang , Guanfeng Liu , Victor S. Sheng

Sequential recommendation is an extensively explored approach to capturing users' evolving preferences based on past interactions, aimed at predicting their next likely choice. Despite significant advancements in this domain, including…

Information Retrieval · Computer Science 2025-04-15 Kowei Shih , Yi Han , Li Tan

Modeling user preference from his historical sequences is one of the core problems of sequential recommendation. Existing methods in this field are widely distributed from conventional methods to deep learning methods. However, most of them…

Information Retrieval · Computer Science 2021-07-28 Mengqi Zhang , Shu Wu , Xueli Yu , Qiang Liu , Liang Wang

Conversational recommender system (CRS) interacts with users through multi-turn dialogues in natural language, which aims to provide high-quality recommendations for user's instant information need. Although great efforts have been made to…

Information Retrieval · Computer Science 2023-10-27 Chenzhan Shang , Yupeng Hou , Wayne Xin Zhao , Yaliang Li , Jing Zhang

Sequential Recommendation (SR) captures users' dynamic preferences by modeling how users transit among items. However, SR models that utilize only single type of behavior interaction data encounter performance degradation when the sequences…

Information Retrieval · Computer Science 2024-02-23 Jiajie Su , Chaochao Chen , Zibin Lin , Xi Li , Weiming Liu , Xiaolin Zheng

Progress in deep learning has spawned great successes in many engineering applications. As a prime example, convolutional neural networks, a type of feedforward neural networks, are now approaching -- and sometimes even surpassing -- human…

Computer Vision and Pattern Recognition · Computer Science 2019-06-12 Drew Linsley , Junkyung Kim , Vijay Veerabadran , Thomas Serre

Automated short answer grading (ASAG) is critical for scaling educational assessment, yet large language models (LLMs) often struggle with hallucinations and strict rubric adherence due to their reliance on generalized pre-training. While…

Computation and Language · Computer Science 2026-03-23 Yucheng Chu , Haoyu Han , Shen Dong , Hang Li , Kaiqi Yang , Yasemin Copur-Gencturk , Joseph Krajcik , Namsoo Shin , Hui Liu

Traditional recommendation systems suffer from inconsistency in multi-stage optimization objectives. Generative Recommendation (GR) mitigates them through an end-to-end framework; however, existing methods still rely on matching mechanisms…