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User preferences follow a dynamic pattern over a day, e.g., at 8 am, a user might prefer to read news, while at 8 pm, they might prefer to watch movies. Time modeling aims to enable recommendation systems to perceive time changes to capture…

Information Retrieval · Computer Science 2024-05-01 Yongchun Zhu , Jingwu Chen , Ling Chen , Yitan Li , Feng Zhang , Zuotao Liu

State-of-the-art sequential recommendation relies heavily on self-attention-based recommender models. Yet such models are computationally expensive and often too slow for real-time recommendation. Furthermore, the self-attention operation…

Information Retrieval · Computer Science 2023-11-09 Zhenrui Yue , Yueqi Wang , Zhankui He , Huimin Zeng , Julian McAuley , Dong Wang

Click-Through Rate (CTR) prediction, a core task in recommendation systems, estimates user click likelihood using historical behavioral data. Modeling user behavior sequences as text to leverage Language Models (LMs) for this task has…

Computation and Language · Computer Science 2025-08-06 Zixuan Li , Binzong Geng , Jing Xiong , Yong He , Yuxuan Hu , Jian Chen , Dingwei Chen , Xiyu Chang , Liang Zhang , Linjian Mo , Chengming Li , Chuan Yuan , Zhenan Sun

Test-Time Training (TTT) is an emerging paradigm that enables models to adapt their parameters during inference, improving performance on tasks such as few-shot learning, retrieval-augmented generation, and complex reasoning. However, this…

Machine Learning · Computer Science 2026-05-25 Simone Antonelli , Sadegh Akhondzadeh , Aleksandar Bojchevski

Recent advances in path-based explainable recommendation systems have attracted increasing attention thanks to the rich information provided by knowledge graphs. Most existing explainable recommendations only utilize static knowledge graphs…

Information Retrieval · Computer Science 2021-11-25 Yicong Li , Hongxu Chen , Yile Li , Lin Li , Philip S. Yu , Guandong Xu

Sequential recommendation (SR) models often capture user preferences based on the historically interacted item IDs, which usually obtain sub-optimal performance when the interaction history is limited. Content-based sequential…

Information Retrieval · Computer Science 2025-10-20 Donglin Zhou , Weike Pan , Zhong Ming

Click-Through Rate (CTR) prediction is one of the core tasks in recommender systems (RS). It predicts a personalized click probability for each user-item pair. Recently, researchers have found that the performance of CTR model can be…

Information Retrieval · Computer Science 2021-08-11 Qiwei Chen , Changhua Pei , Shanshan Lv , Chao Li , Junfeng Ge , Wenwu Ou

Capturing the evolving trends of user interest is important for both recommendation systems and advertising systems, and user behavior sequences have been successfully used in Click-Through-Rate(CTR) prediction problems. However, if the…

Information Retrieval · Computer Science 2022-10-10 Dike Sun , Kai Liu , ShengKai Yang

Session-based Recurrent Neural Networks (RNNs) are gaining increasing popularity for recommendation task, due to the high autocorrelation of user's behavior on the latest session and the effectiveness of RNN to capture the sequence order…

Machine Learning · Computer Science 2019-09-13 Mei Wang , Weizhi Li , Yan Yan

Retrieval-Augmented Generation (RAG) has emerged as a powerful approach for enhancing large language models' question-answering capabilities through the integration of external knowledge. However, when adapting RAG systems to specialized…

Computation and Language · Computer Science 2026-01-19 Xin Sun , Zhongqi Chen , Qiang Liu , Shu Wu , Bowen Song , Weiqiang Wang , Zilei Wang , Liang Wang

Sequential recommender systems (SRS) predict the next items that users may prefer based on user historical interaction sequences. Inspired by the rise of large language models (LLMs) in various AI applications, there is a surge of work on…

Information Retrieval · Computer Science 2024-10-17 CanYi Liu , Wei Li , Youchen , Zhang , Hui Li , Rongrong Ji

Sequential recommendation (SR) aims to model users dynamic preferences from a series of interactions. A pivotal challenge in user modeling for SR lies in the inherent variability of user preferences. An effective SR model is expected to…

Information Retrieval · Computer Science 2023-08-14 Juyong Jiang , Peiyan Zhang , Yingtao Luo , Chaozhuo Li , Jae Boum Kim , Kai Zhang , Senzhang Wang , Xing Xie , Sunghun Kim

Sequential recommendation leverages interaction sequences to predict forthcoming user behaviors, crucial for crafting personalized recommendations. However, the true preferences of a user are inherently complex and high-dimensional, while…

Information Retrieval · Computer Science 2024-07-26 Shu Chen , Jinwei Luo , Weike Pan , Jiangxing Yu , Xin Huang , Zhong Ming

Sequential recommender systems have demonstrated a huge success for next-item recommendation by explicitly exploiting the temporal order of users' historical interactions. In practice, user interactions contain more useful temporal…

Information Retrieval · Computer Science 2023-07-25 Chen Rui , Liang Guotao , Ma Chenrui , Han Qilong , Li Li , Huang Xiao

Sequential recommendation aims to predict the next item which interests users via modeling their interest in items over time. Most of the existing works on sequential recommendation model users' dynamic interest in specific items while…

Information Retrieval · Computer Science 2024-10-30 Chengkai Huang , Shoujin Wang , Xianzhi Wang , Lina Yao

Reciprocal recommender system (RRS), considering a two-way matching between two parties, has been widely applied in online platforms like online dating and recruitment. Existing RRS models mainly capture static user preferences, which have…

Information Retrieval · Computer Science 2023-06-27 Bowen Zheng , Yupeng Hou , Wayne Xin Zhao , Yang Song , Hengshu Zhu

In collaborative filtering, it is an important way to make full use of social information to improve the recommendation quality, which has been proved to be effective because user behavior will be affected by her friends. However, existing…

Social and Information Networks · Computer Science 2021-09-29 Yunzhe Li , Yue Ding , Bo Chen , Xin Xin , Yule Wang , Yuxiang Shi , Ruiming Tang , Dong Wang

The rapid growth of location acquisition technologies makes Point-of-Interest(POI) recommendation possible due to redundant user check-in records. In this paper, we focus on next POI recommendation in which next POI is based on previous…

Information Retrieval · Computer Science 2024-04-11 Yiping Sun

The recommendation has been playing a key role in many industries, e.g., e-commerce, streaming media, social media, etc. Recently, a new recommendation scenario, called Trigger-Induced Recommendation (TIR), where users are able to…

Information Retrieval · Computer Science 2024-08-06 Zhibo Xiao , Luwei Yang , Tao Zhang , Wen Jiang , Wei Ning , Yujiu Yang

Effective user modeling requires distinguishing between short-term and long-term preference evolution. While item embeddings have become a key component of recommender systems, standard approaches like Item2Vec treat user histories as…

Information Retrieval · Computer Science 2026-04-20 Rafael T. Sereicikas , Pedro R. Pires , Gregorio F. Azevedo , Tiago A. Almeida