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Recommender and search systems commonly rely on Learning To Rank models trained on logged user interactions to order items by predicted relevance. However, such interaction data is often subject to position bias, as users are more likely to…

Information Retrieval · Computer Science 2025-09-05 Aleksandr V. Petrov , Michael Murtagh , Karthik Nagesh

Complementary recommendations suggest combinations of useful items that play important roles in e-commerce. However, complementary relationships are often subjective and vary among individuals, making them difficult to infer from historical…

Information Retrieval · Computer Science 2025-10-10 Madoka Hagiri , Kazushi Okamoto , Koki Karube , Kei Harada , Atsushi Shibata

A Conversational Recommender System (CRS) offers increased transparency and control to users by enabling them to engage with the system through a real-time multi-turn dialogue. Recently, Large Language Models (LLMs) have exhibited an…

Large language models (LLMs) are increasingly used for text-rich graph machine learning tasks such as node classification in high-impact domains like fraud detection and recommendation systems. Yet, despite a surge of interest, the field…

Computation and Language · Computer Science 2026-03-03 Ben Finkelshtein , Silviu Cucerzan , Sujay Kumar Jauhar , Ryen White

Large language models (LLMs) excel at generating code from natural language (NL) descriptions. However, the plain textual descriptions are inherently ambiguous and often fail to capture complex requirements like intricate system behaviors,…

Artificial Intelligence · Computer Science 2025-11-06 Wenxin Mao , Zhitao Wang , Long Wang , Sirong Chen , Cuiyun Gao , Luyang Cao , Ziming Liu , Qiming Zhang , Jun Zhou , Zhi Jin

Recommendation systems aim to assist users to discover most preferred contents from an ever-growing corpus of items. Although recommenders have been greatly improved by deep learning, they still faces several challenges: (1) Behaviors are…

Information Retrieval · Computer Science 2020-11-19 Wendi Ji , Keqiang Wang , Xiaoling Wang , TingWei Chen , Alexandra Cristea

Recent advancements in large language models (LLMs) have enabled understanding webpage contexts, product details, and human instructions. Utilizing LLMs as the foundational architecture for either reward models or policies in reinforcement…

Machine Learning · Computer Science 2024-08-30 Shuang Feng , Grace Feng

Conversational recommender systems (CRSs) aim to recommend high-quality items to users through a dialogue interface. It usually contains multiple sub-tasks, such as user preference elicitation, recommendation, explanation, and item…

Information Retrieval · Computer Science 2023-08-14 Yue Feng , Shuchang Liu , Zhenghai Xue , Qingpeng Cai , Lantao Hu , Peng Jiang , Kun Gai , Fei Sun

Conversational Recommender Systems (CRSs) have emerged as a transformative paradigm for offering personalized recommendations through natural language dialogue. However, they face challenges with knowledge sparsity, as users often provide…

Computation and Language · Computer Science 2025-03-11 Zhangchi Qiu , Linhao Luo , Zicheng Zhao , Shirui Pan , Alan Wee-Chung Liew

User profiling is pivotal for recommendation systems, as it transforms raw user interaction data into concise and structured representations that drive personalized recommendations. While traditional embedding-based profiles lack…

Information Retrieval · Computer Science 2025-06-24 Lu Wang , Di Zhang , Fangkai Yang , Pu Zhao , Jianfeng Liu , Yuefeng Zhan , Hao Sun , Qingwei Lin , Weiwei Deng , Dongmei Zhang , Feng Sun , Qi Zhang

Product bundling boosts e-commerce revenue by recommending complementary item combinations. However, existing methods face two critical challenges: (1) collaborative filtering approaches struggle with cold-start items owing to dependency on…

Computation and Language · Computer Science 2026-04-16 Zhe Huang , Peng Wang , Yan Zheng , Sen Song , Longjun Cai

Sequential recommendation aims to predict users' next interaction with items based on their past engagement sequence. Recently, the advent of Large Language Models (LLMs) has sparked interest in leveraging them for sequential…

Information Retrieval · Computer Science 2024-05-07 Jiayi Liao , Sihang Li , Zhengyi Yang , Jiancan Wu , Yancheng Yuan , Xiang Wang , Xiangnan He

Multimodal recommendation combines the user historical behaviors with the modal features of items to capture the tangible user preferences, presenting superior performance compared to the conventional ID-based recommender systems. However,…

Information Retrieval · Computer Science 2026-01-27 Yuzhuo Dang , Xin Zhang , Zhiqiang Pan , Yuxiao Duan , Wanyu Chen , Fei Cai , Honghui Chen

Scientific innovation is pivotal for humanity, and harnessing large language models (LLMs) to generate research ideas could transform discovery. However, existing LLMs often produce simplistic and repetitive suggestions due to their limited…

Artificial Intelligence · Computer Science 2024-10-29 Xiang Hu , Hongyu Fu , Jinge Wang , Yifeng Wang , Zhikun Li , Renjun Xu , Yu Lu , Yaochu Jin , Lili Pan , Zhenzhong Lan

Recommender systems serve as foundational infrastructure in modern information ecosystems, helping users navigate digital content and discover items aligned with their preferences. At their core, recommender systems address a fundamental…

Information Retrieval · Computer Science 2026-05-12 Min Hou , Le Wu , Yuxin Liao , Yonghui Yang , Zhen Zhang , Yu Wang , Changlong Zheng , Han Wu , Richang Hong

The sequential recommendation problem has attracted considerable research attention in the past few years, leading to the rise of numerous recommendation models. In this work, we explore how Large Language Models (LLMs), which are nowadays…

Information Retrieval · Computer Science 2025-01-14 Artun Boz , Wouter Zorgdrager , Zoe Kotti , Jesse Harte , Panos Louridas , Dietmar Jannach , Vassilios Karakoidas , Marios Fragkoulis

Large Language Models (LLMs) have demonstrated impressive reasoning capabilities in complex problem-solving tasks, sparking growing interest in their application to preference reasoning in recommendation systems. Existing methods typically…

Artificial Intelligence · Computer Science 2025-10-27 Yang Zhang , Wenxin Xu , Xiaoyan Zhao , Wenjie Wang , Fuli Feng , Xiangnan He , Tat-Seng Chua

The importance of recommender systems is growing rapidly due to the exponential increase in the volume of content generated daily. This surge in content presents unique challenges for designing effective recommender systems. Key among these…

Computation and Language · Computer Science 2025-06-12 Jiahao Tian , Jinman Zhao , Zhenkai Wang , Zhicheng Ding

Collaborative information from user-item interactions is a fundamental source of signal in successful recommender systems. Recently, researchers have attempted to incorporate this knowledge into large language model-based recommender…

Information Retrieval · Computer Science 2026-03-24 Shahrooz Pouryousef , Ali Montazeralghaem

Recommender systems have become increasingly ubiquitous in daily life. While traditional recommendation approaches primarily rely on ID-based representations or item-side content features, they often fall short in capturing the underlying…

Information Retrieval · Computer Science 2025-08-12 Yunze Luo , Yinjie Jiang , Gaode Chen , Xinghua Zhang , Jun Zhang , Jian Liang , Kaigui Bian