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Data sparsity is an inherent challenge in the recommender systems, where most of the data is collected from the implicit feedbacks of users. This causes two difficulties in designing effective algorithms: first, the majority of users only…

Information Retrieval · Computer Science 2020-07-15 Wenhui Yu , Xiao Lin , Junfeng Ge , Wenwu Ou , Zheng Qin

Recommender systems suffer from the cold-start problem whenever a new user joins the platform or a new item is added to the catalog. To address item cold-start, we propose to replace the embedding layer in sequential recommenders with a…

Information Retrieval · Computer Science 2024-10-02 Kuba Weimann , Tim O. F. Conrad

Sequential recommendation demonstrates the capability to recommend items by modeling the sequential behavior of users. Traditional methods typically treat users as sequences of items, overlooking the collaborative relationships among them.…

Information Retrieval · Computer Science 2023-08-15 Sijia Liu , Jiahao Liu , Hansu Gu , Dongsheng Li , Tun Lu , Peng Zhang , Ning Gu

Can we design effective recommender systems free from users, IDs, and GNNs? Recommender systems are central to personalized content delivery across domains, with top-K item recommendation being a fundamental task to retrieve the most…

Information Retrieval · Computer Science 2026-03-04 Minseo Jeon , Junwoo Jung , Daewon Gwak , Jinhong Jung

Sequential recommendation aims to capture user preferences by modeling sequential patterns in user-item interactions. However, these models are often influenced by noise such as accidental interactions, leading to suboptimal performance.…

Information Retrieval · Computer Science 2025-10-07 Tongzhou Wu , Yuhao Wang , Maolin Wang , Chi Zhang , Xiangyu Zhao

Candidate retrieval is the first stage in recommendation systems, where a light-weight system is used to retrieve potentially relevant items for an input user. These candidate items are then ranked and pruned in later stages of recommender…

Information Retrieval · Computer Science 2023-08-08 Ahmed El-Kishky , Thomas Markovich , Kenny Leung , Frank Portman , Aria Haghighi , Ying Xiao

As a crucial component of most modern deep recommender systems, feature embedding maps high-dimensional sparse user/item features into low-dimensional dense embeddings. However, these embeddings are usually assigned a unified dimension,…

Information Retrieval · Computer Science 2022-04-18 Liang Qu , Yonghong Ye , Ningzhi Tang , Lixin Zhang , Yuhui Shi , Hongzhi Yin

Streaming models are an essential component of real-time speech enhancement tools. The streaming regime constrains speech enhancement models to use only a tiny context of future information. As a result, the low-latency streaming setup is…

Sound · Computer Science 2023-12-06 Pavel Andreev , Nicholas Babaev , Azat Saginbaev , Ivan Shchekotov , Aibek Alanov

Recommender systems are an essential component of e-commerce marketplaces, helping consumers navigate massive amounts of inventory and find what they need or love. In this paper, we present an approach for generating personalized item…

Information Retrieval · Computer Science 2021-02-12 Tian Wang , Yuri M. Brovman , Sriganesh Madhvanath

In recommendation systems, items are likely to be exposed to various users and we would like to learn about the familiarity of a new user with an existing item. This can be formulated as an anomaly detection (AD) problem distinguishing…

Machine Learning · Computer Science 2022-09-22 Ke Bai , Aonan Zhang , Zhizhong Li , Ricardo Heano , Chong Wang , Lawrence Carin

Devising intelligent agents able to live in an environment and learn by observing the surroundings is a longstanding goal of Artificial Intelligence. From a bare Machine Learning perspective, challenges arise when the agent is prevented…

Computer Vision and Pattern Recognition · Computer Science 2022-04-27 Matteo Tiezzi , Simone Marullo , Lapo Faggi , Enrico Meloni , Alessandro Betti , Stefano Melacci

With the rapid advancement of commercial multi-modal models, image editing has garnered significant attention due to its widespread applicability in daily life. Despite impressive progress, existing image editing systems, particularly…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Yiran Zhao , Yaoqi Ye , Xiang Liu , Michael Qizhe Shieh , Trung Bui

Digital human recommendation system has been developed to help customers find their favorite products and is playing an active role in various recommendation contexts. How to timely catch and learn the dynamics of the preferences of the…

Information Retrieval · Computer Science 2022-11-07 Xiong Junwu , Xiaoyun Feng , YunZhou Shi , James Zhang , Zhongzhou Zhao , Wei Zhou

In the context of a short video & live stream mixed recommendation scenario, the live stream recommendation system (RS) decides whether to allocate at most one live stream into the video feed for each user request. To maximize long-term…

Information Retrieval · Computer Science 2025-05-27 Jingxin Liu , Xiang Gao , Yisha Li , Xin Li , Haiyang Lu , Ben Wang

With the increasing availability of online information, recommender systems have become an important tool for many web-based systems. Due to the continuous aspect of recommendation environments, these systems increasingly rely on contextual…

Information Retrieval · Computer Science 2026-04-30 Pedro R. Pires , Gregorio F. Azevedo , Rafael T. Sereicikas , Pietro L. Campos , Tiago A. Almeida

The recent popularity of edge devices and Artificial Intelligent of Things (AIoT) has driven a new wave of contextual recommendations, such as location based Point of Interest (PoI) recommendations and computing resource-aware mobile app…

Information Retrieval · Computer Science 2022-08-23 Sichun Luo , Xinyi Zhang , Yuanzhang Xiao , Linqi Song

Rating elicitation is a success element for recommender systems to perform well at cold-starting, in which the systems need to recommend items to a newly arrived user with no prior knowledge about the user's preference. Existing elicitation…

Information Retrieval · Computer Science 2024-06-04 Hieu Trung Nguyen , Duy Nguyen , Khoa Doan , Viet Anh Nguyen

Most recommender systems adopt collaborative filtering (CF) and provide recommendations based on past collective interactions. Therefore, the performance of CF algorithms degrades when few or no interactions are available, a scenario…

Information Retrieval · Computer Science 2024-09-27 Christian Ganhör , Marta Moscati , Anna Hausberger , Shah Nawaz , Markus Schedl

The goal of Feature Selection - comprising filter, wrapper, and embedded approaches - is to find the optimal feature subset for designated downstream tasks. Nevertheless, current feature selection methods are limited by: 1) the selection…

Machine Learning · Computer Science 2023-09-18 Meng Xiao , Dongjie Wang , Min Wu , Pengfei Wang , Yuanchun Zhou , Yanjie Fu

Modern deep neural networks (DNNs) have greatly facilitated the development of sequential recommender systems by achieving state-of-the-art recommendation performance on various sequential recommendation tasks. Given a sequence of…

Information Retrieval · Computer Science 2021-08-26 Yang Li , Tong Chen , Peng-Fei Zhang , Hongzhi Yin