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Conversational recommenders are emerging as a powerful tool to personalize a user's recommendation experience. Through a back-and-forth dialogue, users can quickly hone in on just the right items. Many approaches to conversational…

Information Retrieval · Computer Science 2023-02-15 Allen Lin , Ziwei Zhu , Jianling Wang , James Caverlee

LLM-based agents are emerging as a promising paradigm for simulating user behavior to enhance recommender systems. However, their effectiveness is often limited by existing studies that focus on modeling user ratings for individual items.…

Information Retrieval · Computer Science 2025-11-17 Jiahao Wang , Bokang Fu , Yu Zhu , Yuli Liu

It is not accurate to make recommendations only based one single current session. Therefore, multi-session-based recommendation(MSBR) is a solution for the problem. Compared with the previous MSBR models, we have made three improvements in…

Information Retrieval · Computer Science 2022-05-10 Zihan Wang , Gang Wu , Yan Wang

Modern recommender systems operate in a fully server-based fashion. To cater to millions of users, the frequent model maintaining and the high-speed processing for concurrent user requests are required, which comes at the cost of a huge…

Information Retrieval · Computer Science 2022-04-26 Xin Xia , Hongzhi Yin , Junliang Yu , Qinyong Wang , Guandong Xu , Nguyen Quoc Viet Hung

Multimodal recommendation systems utilize various types of information, including images and text, to enhance the effectiveness of recommendations. The key challenge is predicting user purchasing behavior from the available data. Current…

Information Retrieval · Computer Science 2025-11-04 Ke Shi , Yan Zhang , Miao Zhang , Lifan Chen , Jiali Yi , Kui Xiao , Xiaoju Hou , Zhifei Li

Recency bias in a sequential recommendation system refers to the overly high emphasis placed on recent items within a user session. This bias can diminish the serendipity of recommendations and hinder the system's ability to capture users'…

Information Retrieval · Computer Science 2024-09-17 Jeonglyul Oh , Sungzoon Cho

The 2021 SIGIR workshop on eCommerce is hosting the Coveo Data Challenge for "In-session prediction for purchase intent and recommendations". The challenge addresses the growing need for reliable predictions within the boundaries of a…

Information Retrieval · Computer Science 2021-07-19 Jacopo Tagliabue , Ciro Greco , Jean-Francis Roy , Bingqing Yu , Patrick John Chia , Federico Bianchi , Giovanni Cassani

Sequential recommender infers users' evolving psychological motivations from historical interactions to recommend the next preferred items. Most existing methods compress recent behaviors into a single vector and optimize it toward a single…

Information Retrieval · Computer Science 2026-04-20 Yicheng Di , Yuan Liu , Zhi Chen , Jingcai Guo

Sequential Recommendation is a prominent topic in current research, which uses user behavior sequence as an input to predict future behavior. By assessing the correlation strength of historical behavior through the dot product, the model…

Information Retrieval · Computer Science 2023-02-23 Jiayi Chen , Wen Wu , Liye Shi , Yu Ji , Wenxin Hu , Xi Chen , Wei Zheng , Liang He

Understanding user interests is crucial for Click-Through Rate (CTR) prediction tasks. In sequential recommendation, pre-training from user historical behaviors through self-supervised learning can better comprehend user dynamic…

Information Retrieval · Computer Science 2024-07-30 Ruidong Han , Qianzhong Li , He Jiang , Rui Li , Yurou Zhao , Xiang Li , Wei Lin

Predictor combination aims to improve a (target) predictor of a learning task based on the (reference) predictors of potentially relevant tasks, without having access to the internals of individual predictors. We present a new predictor…

Machine Learning · Computer Science 2020-07-17 Kwang In Kim , Christian Richardt , Hyung Jin Chang

In sparse recommender settings, users' context and item attributes play a crucial role in deciding which items to recommend next. Despite that, recent works in sequential and time-aware recommendations usually either ignore both aspects or…

Information Retrieval · Computer Science 2022-09-21 Ahmed Rashed , Shereen Elsayed , Lars Schmidt-Thieme

Generative recommendation has recently emerged as a promising paradigm for sequential recommendation. It formulates the task as an autoregressive generation process, predicting tokens of the next item conditioned on user interaction…

Information Retrieval · Computer Science 2026-05-29 Yuanqing Yu , Yifan Wang , Weizhi Ma , Zhiqiang Guo , Min Zhang

In this work, we propose a Unified framework of Sequential Search and Recommendation (UnifiedSSR) for joint learning of user behavior history in both search and recommendation scenarios. Specifically, we consider user-interacted products in…

Information Retrieval · Computer Science 2023-10-24 Jiayi Xie , Shang Liu , Gao Cong , Zhenzhong Chen

Recommendation systems focus on helping users find items of interest in the situations of information overload, where users' preferences are typically estimated by the past observed behaviors. In contrast, conversational recommendation…

Computation and Language · Computer Science 2022-03-29 Ting-Chun Wang , Shang-Yu Su , Yun-Nung Chen

Recommender systems in multi-behavior domains, such as advertising and e-commerce, aim to guide users toward high-value but inherently sparse conversions. Leveraging auxiliary behaviors (e.g., clicks, likes, shares) is therefore essential.…

Information Retrieval · Computer Science 2025-11-06 Zhefan Wang , Guokai Yan , Jinbei Yu , Siyu Gu , Jingyan Chen , Peng Jiang , Zhiqiang Guo , Min Zhang

Conversational Recommender Systems (CRS) has become an emerging research topic seeking to perform recommendations through interactive conversations, which generally consist of generation and recommendation modules. Prior work on CRS tends…

Computation and Language · Computer Science 2022-09-26 Lingzhi Wang , Shafiq Joty , Wei Gao , Xingshan Zeng , Kam-Fai Wong

Many modern sequential recommender systems use deep neural networks, which can effectively estimate the relevance of items but require a lot of time to train. Slow training increases expenses, hinders product development timescales and…

Information Retrieval · Computer Science 2022-07-18 Aleksandr Petrov , Craig Macdonald

We describe a hybrid meta-architecture -- the CHAMELEON -- for session-based news recommendation that is able to leverage a variety of information types using Recurrent Neural Networks. We evaluated our approach on two public datasets,…

Machine Learning · Computer Science 2020-06-24 Gabriel de Souza P. Moreira , Dietmar Jannach , Adilson Marques da Cunha

The KNN approach, which is widely used in recommender systems because of its efficiency, robustness and interpretability, is proposed for session-based recommendation recently and outperforms recurrent neural network models. It captures the…

Information Retrieval · Computer Science 2018-07-17 Huifeng Guo , Ruiming Tang , Yunming Ye , Feng Liu , Yuzhou Zhang