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Recommendation is the task of improving customer experience through personalized recommendation based on users' past feedback. In this paper, we investigate the most common scenario: the user-item (U-I) matrix of implicit feedback. Even…

Machine Learning · Computer Science 2017-07-21 Peng Yang , Peilin Zhao , Xin Gao , Yong Liu

User preferences for items can be inferred from either explicit feedback, such as item ratings, or implicit feedback, such as rental histories. Research in collaborative filtering has concentrated on explicit feedback, resulting in the…

Machine Learning · Computer Science 2015-03-19 Andriy Mnih , Yee Whye Teh

Instruction-following is a fundamental capability of language models, requiring the model to recognize even the most subtle requirements in the instructions and accurately reflect them in its output. Such an ability is well-suited for and…

Computation and Language · Computer Science 2025-03-18 Jiale Cheng , Xiao Liu , Cunxiang Wang , Xiaotao Gu , Yida Lu , Dan Zhang , Yuxiao Dong , Jie Tang , Hongning Wang , Minlie Huang

We introduce Probabilistic Rank and Reward (PRR), a scalable probabilistic model for personalized slate recommendation. Our approach allows off-policy estimation of the reward in the scenario where the user interacts with at most one item…

Information Retrieval · Computer Science 2024-07-08 Imad Aouali , Achraf Ait Sidi Hammou , Otmane Sakhi , David Rohde , Flavian Vasile

The modeling of users' behaviors is crucial in modern recommendation systems. A lot of research focuses on modeling users' lifelong sequences, which can be extremely long and sometimes exceed thousands of items. These models use the target…

Information Retrieval · Computer Science 2024-07-16 Kaiming Shen , Xichen Ding , Zixiang Zheng , Yuqi Gong , Qianqian Li , Zhongyi Liu , Guannan Zhang

Sequential recommender systems (SRS) have gained increasing popularity due to their remarkable proficiency in capturing dynamic user preferences. In the current setup of SRS, a common configuration is to uniformly consider each historical…

Information Retrieval · Computer Science 2025-06-03 Hao Zhang , Mingyue Cheng , Zhiding Liu , Junzhe Jiang

Leveraging users' long engagement histories is essential for personalized content recommendations. The success of pretrained language models (PLMs) in NLP has led to their use in encoding user histories and candidate items, framing content…

Information Retrieval · Computer Science 2024-05-24 Chiyu Zhang , Yifei Sun , Jun Chen , Jie Lei , Muhammad Abdul-Mageed , Sinong Wang , Rong Jin , Sem Park , Ning Yao , Bo Long

Recommender systems play a critical role in enhancing user experience by providing personalized suggestions based on user preferences. Traditional approaches often rely on explicit numerical ratings or assume access to fully ranked lists of…

Information Retrieval · Computer Science 2025-08-22 Bahar Boroomand , James R. Wright

The ability to extract value from historical data is essential for enterprise decision-making. However, much of this information remains inaccessible within large legacy file systems that lack structured organization and semantic indexing,…

Information Retrieval · Computer Science 2025-12-16 Duy A. Nguyen , Hai H. Do , Minh Doan , Minh N. Do

Ordinal user-provided ratings across multiple items are frequently encountered in both scientific and commercial applications. Whilst recommender systems are known to do well on these type of data from a predictive point of view, their…

Methodology · Statistics 2025-03-05 Sjoerd Hermes

In real-world recommendation systems, users would engage in variety scenarios, such as homepages, search pages, and related recommendation pages. Each of these scenarios would reflect different aspects users focus on. However, the user…

Information Retrieval · Computer Science 2025-06-24 Zhijian Feng , Wenhao Zheng , Xuanji Xiao

Multi-interest learning method for sequential recommendation aims to predict the next item according to user multi-faceted interests given the user historical interactions. Existing methods mainly consist of a multi-interest extractor that…

Information Retrieval · Computer Science 2024-04-30 Xue Dong , Xuemeng Song , Tongliang Liu , Weili Guan

The personalized recommendation is an essential part of modern e-commerce, where user's demands are not only conditioned by their profile but also by their recent browsing behaviors as well as periodical purchases made some time ago. In…

Information Retrieval · Computer Science 2022-02-08 Jiarui Jin , Xianyu Chen , Weinan Zhang , Junjie Huang , Ziming Feng , Yong Yu

The emerging meta- and multi-verse landscape is yet another step towards the more prevalent use of already ubiquitous online markets. In such markets, recommender systems play critical roles by offering items of interest to the users,…

Information Retrieval · Computer Science 2022-09-28 Ehsan Gholami , Mohammad Motamedi , Ashwin Aravindakshan

The vocabulary gap is a core challenge in information retrieval (IR). In e-commerce applications like product search, the vocabulary gap is reported to be a bigger challenge than in more traditional application areas in IR, such as news…

Information Retrieval · Computer Science 2020-07-21 Fatemeh Sarvi , Nikos Voskarides , Lois Mooiman , Sebastian Schelter , Maarten de Rijke

Traditional recommendation systems estimate user preference on items from past interaction history, thus suffering from the limitations of obtaining fine-grained and dynamic user preference. Conversational recommendation system (CRS) brings…

Information Retrieval · Computer Science 2020-07-02 Wenqiang Lei , Gangyi Zhang , Xiangnan He , Yisong Miao , Xiang Wang , Liang Chen , Tat-Seng Chua

Machine Learning's proliferation in critical fields such as healthcare, banking, and criminal justice has motivated the creation of tools which ensure trust and transparency in ML models. One such tool is Actionable Recourse (AR) for…

Machine Learning · Computer Science 2023-09-07 Jayanth Yetukuri , Ian Hardy , Yang Liu

Detailed image captioning is essential for tasks like data generation and aiding visually impaired individuals. High-quality captions require a balance between precision and recall, which remains challenging for current multimodal large…

Computer Vision and Pattern Recognition · Computer Science 2025-06-05 Mingi Jung , Saehyung Lee , Eunji Kim , Sungroh Yoon

Sequential Recommendation (SR) predicts users next interactions by modeling the temporal order of their historical behaviors. Existing approaches, including traditional sequential models and generative recommenders, achieve strong…

Information Retrieval · Computer Science 2026-03-06 Sirui Huang , Jing Long , Qian Li , Guandong Xu , Qing Li

Although Large language Model (LLM)-powered information extraction (IE) systems have shown impressive capabilities, current fine-tuning paradigms face two major limitations: high training costs and difficulties in aligning with LLM…

Computation and Language · Computer Science 2025-12-16 Yushen Fang , Jianjun Li , Mingqian Ding , Chang Liu , Xinchi Zou , Wenqi Yang