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Sequential Recommendation (SR) characterizes evolving patterns of user behaviors by modeling how users transit among items. However, the short interaction sequences limit the performance of existing SR. To solve this problem, we focus on…

Information Retrieval · Computer Science 2022-09-22 Xiaolin Zheng , Jiajie Su , Weiming Liu , Chaochao Chen

To tackle cold-start and data sparsity issues in recommender systems, numerous multimodal, sequential, and contrastive techniques have been proposed. While these augmentations can boost recommendation performance, they tend to add noise and…

Information Retrieval · Computer Science 2026-02-10 Bucher Sahyouni , Matthew Vowels , Liqun Chen , Simon Hadfield

In e-commerce platforms, the relevant recommendation is a unique scenario providing related items for a trigger item that users are interested in. However, users' preferences for the similarity and diversity of recommendation results are…

Information Retrieval · Computer Science 2023-08-22 Wei Dai , Yingmin Su , Xiaofeng Pan

Deep learning-based recommender systems have achieved remarkable success in recent years. However, these methods usually heavily rely on labeled data (i.e., user-item interactions), suffering from problems such as data sparsity and…

Information Retrieval · Computer Science 2023-10-12 Mengyuan Jing , Yanmin Zhu , Tianzi Zang , Ke Wang

Sequential recommender systems have achieved state-of-the-art recommendation performance by modeling the sequential dynamics of user activities. However, in most recommendation scenarios, the popular items comprise the major part of the…

Information Retrieval · Computer Science 2023-08-08 Yi Ren , Xu Zhao , Hongyan Tang , Shuai Li

Sequential recommendation aims to choose the most suitable items for a user at a specific timestamp given historical behaviors. Existing methods usually model the user behavior sequence based on the transition-based methods like Markov…

Information Retrieval · Computer Science 2022-07-11 Zijian Li , Ruichu Cai , Fengzhu Wu , Sili Zhang , Hao Gu , Yuexing Hao , Yuguang

Collaborative Metric Learning (CML) has recently emerged as a popular method in recommendation systems (RS), closing the gap between metric learning and collaborative filtering. Following the convention of RS, existing practices exploit…

Information Retrieval · Computer Science 2024-09-04 Shilong Bao , Qianqian Xu , Zhiyong Yang , Yuan He , Xiaochun Cao , Qingming Huang

An efficient solution to the large-scale recommender system is to represent users and items as binary hash codes in the Hamming space. Towards this end, existing methods tend to code users by modeling their Hamming similarities with the…

Information Retrieval · Computer Science 2023-01-16 Han Liu , Yinwei Wei , Jianhua Yin , Liqiang Nie

Sequential recommender systems predict items that may interest users by modeling their preferences based on historical interactions. Traditional sequential recommendation methods rely on capturing implicit collaborative filtering signals…

Information Retrieval · Computer Science 2024-03-28 Shenghao Yang , Weizhi Ma , Peijie Sun , Qingyao Ai , Yiqun Liu , Mingchen Cai , Min Zhang

Click-through rate (CTR) prediction tasks typically estimate the probability of a user clicking on a candidate item by modeling both user behavior sequence features and the item's contextual features, where the user behavior sequence is…

Information Retrieval · Computer Science 2026-03-16 Yi Xu , Chaofan Fan , Moyu Zhang , Jinxin Hu , Jiahao Wang , Hao Zhang , Shizhun Wang , Yu Zhang , Xiaoyi Zeng

Personalized generative recommender systems have emerged as a promising solution for fashion recommendation. However, existing methods primarily rely on implicit visual embeddings from historical interactions, which often contain…

Information Retrieval · Computer Science 2026-05-19 Mingzhe Yu , Lei Wu , Qianru Sun , Yunshan Ma

The sequential patterns within the user interactions are pivotal for representing the user's preference and capturing latent relationships among items. The recent advancements of sequence modeling by Transformers advocate the community to…

Information Retrieval · Computer Science 2021-06-14 Ziwei Fan , Zhiwei Liu , Lei Zheng , Shen Wang , Philip S. Yu

Recommender systems are crucial to alleviate the information overload problem in online worlds. Most of the modern recommender systems capture users' preference towards items via their interactions based on collaborative filtering…

Information Retrieval · Computer Science 2019-07-17 Wenqi Fan , Yao Ma , Dawei Yin , Jianping Wang , Jiliang Tang , Qing Li

The chronological order of user-item interactions can reveal time-evolving and sequential user behaviors in many recommender systems. The items that users will interact with may depend on the items accessed in the past. However, the…

Information Retrieval · Computer Science 2019-12-30 Chen Ma , Liheng Ma , Yingxue Zhang , Jianing Sun , Xue Liu , Mark Coates

Sequential recommendation aims to recommend the next item that matches a user's interest, based on the sequence of items he/she interacted with before. Scrutinizing previous studies, we can summarize a common learning-to-classify paradigm…

Information Retrieval · Computer Science 2023-11-01 Zhengyi Yang , Jiancan Wu , Zhicai Wang , Xiang Wang , Yancheng Yuan , Xiangnan He

Recently, Graph Convolutional Network (GCN) has become a novel state-of-art for Collaborative Filtering (CF) based Recommender Systems (RS). It is a common practice to learn informative user and item representations by performing embedding…

Information Retrieval · Computer Science 2024-05-08 Yinan Zhang , Pei Wang , Congcong Liu , Xiwei Zhao , Hao Qi , Jie He , Junsheng Jin , Changping Peng , Zhangang Lin , Jingping Shao

Graph Convolution Networks (GCNs) have significantly succeeded in learning user and item representations for recommendation systems. The core of their efficacy is the ability to explicitly exploit the collaborative signals from both the…

Information Retrieval · Computer Science 2024-11-11 Fan Liu , Shuai Zhao , Zhiyong Cheng , Liqiang Nie , Mohan Kankanhalli

The increasing availability and diversity of multimodal data in recommender systems offer new avenues for enhancing recommendation accuracy and user satisfaction. However, these systems must contend with high-dimensional, sparse user-item…

Information Retrieval · Computer Science 2024-12-04 Yasser Khalafaoui , Martino Lovisetto , Basarab Matei , Nistor Grozavu

Diffusion models (DMs) have emerged as promising approaches for sequential recommendation due to their strong ability to model data distributions and generate high-quality items. Existing work typically adds noise to the next item and…

Information Retrieval · Computer Science 2025-02-12 Wenyu Mao , Shuchang Liu , Haoyang Liu , Haozhe Liu , Xiang Li , Lantao Hu

The goal of personalized history-based recommendation is to automatically output a distribution over all the items given a sequence of previous purchases of a user. In this work, we present a novel approach that uses a recurrent network for…

Machine Learning · Computer Science 2017-09-25 Tian Wang , Kyunghyun Cho