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Darknet markets provide a large platform for trading illicit goods and services due to their anonymity. Learning an invariant representation of each user based on their posts on different markets makes it easy to aggregate user information…

Machine Learning · Computer Science 2023-03-21 Hongmeng Liu , Jiapeng Zhao , Yixuan Huo , Yuyan Wang , Chun Liao , Liyan Shen , Shiyao Cui , Jinqiao Shi

Modeling long histories plays a pivotal role in enhancing recommendation systems, allowing to capture user's evolving preferences, resulting in more precise and personalized recommendations. In this study we tackle the challenges of…

Computation and Language · Computer Science 2024-01-11 Sumanth Doddapaneni , Krishna Sayana , Ambarish Jash , Sukhdeep Sodhi , Dima Kuzmin

We have witnessed the discovery of many techniques for network representation learning in recent years, ranging from encoding the context in random walks to embedding the lower order connections, to finding latent space representations with…

Machine Learning · Computer Science 2017-10-10 Yanlei Yu , Zhiwu Lu , Jiajun Liu , Guoping Zhao , Ji-Rong Wen , Kai Zheng

Social media user representation learning aims to capture user preferences, interests, and behaviors in low-dimensional vector representations. These representations are critical to a range of social problems, including predicting user…

Social and Information Networks · Computer Science 2025-03-24 Siyi Guo , Keith Burghardt , Valeria Pantè , Kristina Lerman

Models for image representation learning are typically designed for either recognition or generation. Various forms of contrastive learning help models learn to convert images to embeddings that are useful for classification, detection, and…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Matthew Gwilliam , Xiao Wang , Xuefeng Hu , Zhenheng Yang

Recommender systems (RecSys) have become essential in modern society, driving user engagement and satisfaction across diverse online platforms. Most RecSys focuses on designing a powerful encoder to embed users and items into…

Information Retrieval · Computer Science 2025-03-25 Xi Wu , Dan Zhang , Chao Zhou , Liangwei Yang , Tianyu Lin , Jibing Gong

Recent state-of-the-art recommender systems predominantly rely on either implicit or explicit feedback from users to suggest new items. While effective in recommending novel options, many recommender systems often use uninterpretable…

Information Retrieval · Computer Science 2024-07-22 Jerome Ramos , Hossen A. Rahmani , Xi Wang , Xiao Fu , Aldo Lipani

Recent advancement of large-scale pretrained models such as BERT, GPT-3, CLIP, and Gopher, has shown astonishing achievements across various task domains. Unlike vision recognition and language models, studies on general-purpose user…

Information Retrieval · Computer Science 2022-11-23 Kyuyong Shin , Hanock Kwak , Su Young Kim , Max Nihlen Ramstrom , Jisu Jeong , Jung-Woo Ha , Kyung-Min Kim

Reducing negative user experiences is essential for the success of recommendation platforms. Exposing users to inappropriate content could not only adversely affect users' psychological well-beings, but also potentially drive users away…

Information Retrieval · Computer Science 2025-02-18 Chenghui Yu , Peiyi Li , Haoze Wu , Yiri Wen , Bingfeng Deng , Hongyu Xiong

It is common practice nowadays to use multiple social networks for different social roles. Although this, these networks assume differences in content type, communications and style of speech. If we intend to understand human behaviour as a…

Computer Vision and Pattern Recognition · Computer Science 2020-05-07 Timur Sokhin , Nikolay Butakov , Denis Nasonov

User simulation is increasingly vital to develop and evaluate recommender systems (RSs). While Large Language Models (LLMs) offer promising avenues to simulate user behavior, they often struggle with the absence of specific task alignment…

Human-Computer Interaction · Computer Science 2026-04-20 Tianjun Wei , Huizhong Guo , Yingpeng Du , Zhu Sun , Huang Chen , Dongxia Wang , Jie Zhang

Content-based recommendation systems play a crucial role in delivering personalized content to users in the digital world. In this work, we introduce EmbSum, a novel framework that enables offline pre-computations of users and candidate…

Information Retrieval · Computer Science 2024-08-20 Chiyu Zhang , Yifei Sun , Minghao Wu , Jun Chen , Jie Lei , Muhammad Abdul-Mageed , Rong Jin , Angli Liu , Ji Zhu , Sem Park , Ning Yao , Bo Long

With the advent of large labelled datasets and high-capacity models, the performance of machine vision systems has been improving rapidly. However, the technology has still major limitations, starting from the fact that different vision…

Computer Vision and Pattern Recognition · Computer Science 2024-02-27 Hakan Bilen , Andrea Vedaldi

We present a unified network for simultaneously generating videos and their corresponding entity segmentation and depth maps from text prompts. We utilize colormap to represent entity masks and depth maps, tightly integrating dense…

Computer Vision and Pattern Recognition · Computer Science 2025-03-13 Lehan Yang , Lu Qi , Xiangtai Li , Sheng Li , Varun Jampani , Ming-Hsuan Yang

A key challenge in complex visuomotor control is learning abstract representations that are effective for specifying goals, planning, and generalization. To this end, we introduce universal planning networks (UPN). UPNs embed differentiable…

Machine Learning · Computer Science 2018-04-05 Aravind Srinivas , Allan Jabri , Pieter Abbeel , Sergey Levine , Chelsea Finn

Leveraging Large Language Models (LLMs) for recommendation has demonstrated notable success in various domains, showcasing their potential for open-domain recommendation. A key challenge to advancing open-domain recommendation lies in…

Information Retrieval · Computer Science 2025-07-29 Honghui Bao , Wenjie Wang , Xinyu Lin , Fengbin Zhu , Teng Sun , Fuli Feng , Tat-Seng Chua

Modeling user interests is crucial in real-world recommender systems. In this paper, we present a new user interest representation model for personalized recommendation. Specifically, the key novelty behind our model is that it explicitly…

Information Retrieval · Computer Science 2020-11-12 Shuai Zhang , Huoyu Liu , Aston Zhang , Yue Hu , Ce Zhang , Yumeng Li , Tanchao Zhu , Shaojian He , Wenwu Ou

Collaborative filtering problems are commonly solved based on matrix completion techniques which recover the missing values of user-item interaction matrices. In a matrix, the rating position specifically represents the user given and the…

Information Retrieval · Computer Science 2022-10-11 Taejun Lim , Siqu Long , Josiah Poon , Soyeon Caren Han

Large Language Models have shown great success in recommender systems. However, the limited and sparse nature of user data often restricts the LLM's ability to effectively model behavior patterns. To address this, existing studies have…

Information Retrieval · Computer Science 2026-04-17 Lei Guo , Hongyun Yang , Pengjie Ren , Tong Chen , Hui Liu , Zhumin Chen

Representation learning is the foundation of natural language processing (NLP). This work presents new methods to employ visual information as assistant signals to general NLP tasks. For each sentence, we first retrieve a flexible number of…

Computation and Language · Computer Science 2023-01-10 Zhuosheng Zhang , Kehai Chen , Rui Wang , Masao Utiyama , Eiichiro Sumita , Zuchao Li , Hai Zhao