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"High Quality Related Search Query Suggestions" task aims at recommending search queries which are real, accurate, diverse, relevant and engaging. Obtaining large amounts of query-quality human annotations is expensive. Prior work on…

Information Retrieval · Computer Science 2021-08-11 Praveen Kumar Bodigutla

In recent years, Multi-task Learning (MTL) has yielded immense success in Recommender System (RS) applications. However, current MTL-based recommendation models tend to disregard the session-wise patterns of user-item interactions because…

Information Retrieval · Computer Science 2023-03-13 Ziru Liu , Jiejie Tian , Qingpeng Cai , Xiangyu Zhao , Jingtong Gao , Shuchang Liu , Dayou Chen , Tonghao He , Dong Zheng , Peng Jiang , Kun Gai

Multi-task learning (MTL) aims at learning related tasks in a unified model to achieve mutual improvement among tasks considering their shared knowledge. It is an important topic in recommendation due to the demand for multi-task prediction…

Information Retrieval · Computer Science 2023-02-10 Yuhao Wang , Ha Tsz Lam , Yi Wong , Ziru Liu , Xiangyu Zhao , Yichao Wang , Bo Chen , Huifeng Guo , Ruiming Tang

Deep learning has proved an effective means to capture the non-linear associations of user preferences. However, the main drawback of existing deep learning architectures is that they follow a fixed recommendation strategy, ignoring users'…

Information Retrieval · Computer Science 2020-12-02 Dimitrios Rafailidis , Stefanos Antaris

State-of-the-art methods on conversational recommender systems (CRS) leverage external knowledge to enhance both items' and contextual words' representations to achieve high quality recommendations and responses generation. However, the…

Information Retrieval · Computer Science 2023-04-19 Huy Dao , Dung D. Le , Cuong Chu

To address the long-standing data sparsity problem in recommender systems (RSs), cross-domain recommendation (CDR) has been proposed to leverage the relatively richer information from a richer domain to improve the recommendation…

Information Retrieval · Computer Science 2021-03-03 Feng Zhu , Yan Wang , Chaochao Chen , Jun Zhou , Longfei Li , Guanfeng Liu

Though recent end-to-end neural models have shown promising progress on Conversational Recommender System (CRS), two key challenges still remain. First, the recommended items cannot be always incorporated into the generated replies…

Computation and Language · Computer Science 2021-09-28 Zujie Liang , Huang Hu , Can Xu , Jian Miao , Yingying He , Yining Chen , Xiubo Geng , Fan Liang , Daxin Jiang

Strategic recommendations (SR) refer to the problem where an intelligent agent observes the sequential behaviors and activities of users and decides when and how to interact with them to optimize some long-term objectives, both for the user…

Machine Learning · Computer Science 2020-09-17 Georgios Theocharous , Yash Chandak , Philip S. Thomas , Frits de Nijs

With the recent prevalence of Reinforcement Learning (RL), there have been tremendous interests in developing RL-based recommender systems. In practical recommendation sessions, users will sequentially access multiple scenarios, such as the…

Information Retrieval · Computer Science 2020-08-18 Xiangyu Zhao , Long Xia , Linxin Zou , Hui Liu , Dawei Yin , Jiliang Tang

E-commerce pre-sales dialogue aims to understand and elicit user needs and preferences for the items they are seeking so as to provide appropriate recommendations. Conversational recommender systems (CRSs) learn user representation and…

Computation and Language · Computer Science 2024-10-21 Yuanxing Liu , Wei-Nan Zhang , Yifan Chen , Yuchi Zhang , Haopeng Bai , Fan Feng , Hengbin Cui , Yongbin Li , Wanxiang Che

Training conversational recommender systems (CRS) requires extensive dialogue data, which is challenging to collect at scale. To address this, researchers have used simulated user-recommender conversations. Traditional simulation approaches…

Artificial Intelligence · Computer Science 2026-03-20 Jerome Ramos , Feng Xia , Xi Wang , Shubham Chatterjee , Xiao Fu , Hossein A. Rahmani , Aldo Lipani

In the vast landscape of internet information, recommender systems (RecSys) have become essential for guiding users through a sea of choices aligned with their preferences. These systems have applications in diverse domains, such as news…

Information Retrieval · Computer Science 2024-08-01 Liangwei Yang , Zhiwei Liu , Jianguo Zhang , Rithesh Murthy , Shelby Heinecke , Huan Wang , Caiming Xiong , Philip S. Yu

Conversational Recommender Systems (CRSs) leverage natural language interactions for personalized recommendation, yet information-scarce dialogue histories and single-turn recommendation paradigms may severely hinder accurate modeling of…

Information Retrieval · Computer Science 2026-04-07 Xingyuan Xiang , Xiangchen Pan , Wei Wei

Conversational recommendation systems (CRS) engage with users by inferring user preferences from dialog history, providing accurate recommendations, and generating appropriate responses. Previous CRSs use knowledge graph (KG) based…

Computation and Language · Computer Science 2021-12-16 Bowen Yang , Cong Han , Yu Li , Lei Zuo , Zhou Yu

Conversational recommender systems (CRSs) aim to proactively capture user preferences through natural language dialogue and recommend high-quality items. To achieve this, CRS gathers user preferences via a dialog module and builds user…

Artificial Intelligence · Computer Science 2025-11-12 Zhenye Yang , Jinpeng Chen , Huan Li , Xiongnan Jin , Xuanyang Li , Junwei Zhang , Hongbo Gao , Kaimin Wei , Senzhang Wang

Searching for and making decisions about information is becoming increasingly difficult as the amount of information and number of choices increases. Recommendation systems help users find items of interest of a particular type, such as…

Information Retrieval · Computer Science 2011-07-04 M. H. Goker , P. Langley , C. A. Thompson

Large-scale industrial recommender systems are usually confronted with computational problems due to the enormous corpus size. To retrieve and recommend the most relevant items to users under response time limits, resorting to an efficient…

Information Retrieval · Computer Science 2019-11-21 Han Zhu , Daqing Chang , Ziru Xu , Pengye Zhang , Xiang Li , Jie He , Han Li , Jian Xu , Kun Gai

Sequential Recommendation Systems (SRS) have become essential in many real-world applications. However, existing SRS methods often rely on collaborative filtering signals and fail to capture real-time user preferences, while Conversational…

Information Retrieval · Computer Science 2025-09-12 Yifan Wang , Shen Gao , Jiabao Fang , Rui Yan , Billy Chiu , Shuo Shang

Recommender Systems (RS) aim to provide personalized suggestions of items for users against consumer over-choice. Although extensive research has been conducted to address different aspects and challenges of RS, there still exists a gap…

Information Retrieval · Computer Science 2023-03-07 Peiyan Zhang , Sunghun Kim

Large language models (LLMs) exhibit enhanced capabilities in language understanding and generation. By utilizing their embedded knowledge, LLMs are increasingly used as conversational recommender systems (CRS), achieving improved…

Information Retrieval · Computer Science 2026-04-14 Zhenrui Yue , Honglei Zhuang , Zhen Qin , Zhankui He , Huimin Zeng , Julian McAuley , Dong Wang