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In recent years, large language models have shown exceptional performance in fulfilling diverse human needs. However, their training data can introduce harmful content, underscoring the necessity for robust value alignment. Mainstream…

Artificial Intelligence · Computer Science 2024-12-19 Rui Zou , Mengqi Wei , Jintian Feng , Qian Wan , Jianwen Sun , Sannyuya Liu

Visual modality is the most vulnerable to privacy leakage in real-world multimodal applications like autonomous driving with visual and radar data; Machine unlearning removes specific training data from pre-trained models to address privacy…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Jinghan Xu Yuyang Zhang Qixuan Cai Jiancheng Chen Keqiu Li

A fundamental limitation of current LLM-based AI agents is their inability to build differentiated trust among each other at the onset of an agent-to-agent dialogue. However, autonomous and interoperable trust establishment becomes…

Cryptography and Security · Computer Science 2026-05-28 Sandro Rodriguez Garzon , Awid Vaziry , Enis Mert Kuzu , Dennis Enrique Gehrmann , Buse Varkan , Alexander Gaballa , Axel Küpper

Reward decomposition is a critical problem in centralized training with decentralized execution~(CTDE) paradigm for multi-agent reinforcement learning. To take full advantage of global information, which exploits the states from all agents…

Machine Learning · Computer Science 2021-02-26 Jianzhun Shao , Hongchang Zhang , Yuhang Jiang , Shuncheng He , Xiangyang Ji

Visual Dialog is a challenging vision-language task since the visual dialog agent needs to answer a series of questions after reasoning over both the image content and dialog history. Though existing methods try to deal with the cross-modal…

Computer Vision and Pattern Recognition · Computer Science 2022-04-18 Feilong Chen , Xiuyi Chen , Shuang Xu , Bo Xu

Exploration in cooperative multi-agent reinforcement learning (MARL) remains challenging for value-based agents due to the absence of an explicit policy. Existing approaches include individual exploration based on uncertainty towards the…

Artificial Intelligence · Computer Science 2024-12-31 Guangchong Zhou , Zeren Zhang , Guoliang Fan

Multimodal learning from document data has achieved great success lately as it allows to pre-train semantically meaningful features as a prior into a learnable downstream task. In this paper, we approach the document classification problem…

Computer Vision and Pattern Recognition · Computer Science 2023-05-12 Souhail Bakkali , Zuheng Ming , Mickael Coustaty , Marçal Rusiñol , Oriol Ramos Terrades

Open-Vocabulary Temporal Action Detection (OV-TAD) aims to classify and localize action segments in untrimmed videos for unseen categories. Previous methods rely solely on global alignment between label-level semantics and visual features,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-26 Sa Zhu , Wanqian Zhang , Lin Wang , Xiaohua Chen , Chenxu Cui , Jinchao Zhang , Bo Li

We consider the core reinforcement-learning problem of on-policy value function approximation from a batch of trajectory data, and focus on various issues of Temporal Difference (TD) learning and Monte Carlo (MC) policy evaluation. The two…

Sequential recommendation is one of the important branches of recommender system, aiming to achieve personalized recommended items for the future through the analysis and prediction of users' ordered historical interactive behaviors.…

Information Retrieval · Computer Science 2024-05-09 Zeyu Hu , Yuzhi Xiao , Tao Huang , Xuanrong Huo

Ransomware has become a critical threat to cybersecurity due to its rapid evolution, the necessity for early detection, and growing diversity, posing significant challenges to traditional detection methods. While AI-based approaches had…

Cryptography and Security · Computer Science 2025-10-28 Zhixin Pan , Ziyu Shu , Amberbir Alemayoh

The collaboration between agents has gradually become an important topic in multi-agent systems. The key is how to efficiently solve the credit assignment problems. This paper introduces MGAN for collaborative multi-agent reinforcement…

Multiagent Systems · Computer Science 2021-05-14 Zhiwei Xu , Bin Zhang , Yunpeng Bai , Dapeng Li , Guoliang Fan

We propose a novel VAE-based deep auto-encoder model that can learn disentangled latent representations in a fully unsupervised manner, endowed with the ability to identify all meaningful sources of variation and their cardinality. Our…

Machine Learning · Computer Science 2019-02-06 Minyoung Kim , Yuting Wang , Pritish Sahu , Vladimir Pavlovic

Contrastive divergence (CD) learning is a classical method for fitting unnormalized statistical models to data samples. Despite its wide-spread use, the convergence properties of this algorithm are still not well understood. The main source…

Machine Learning · Computer Science 2021-03-17 Omer Yair , Tomer Michaeli

This paper proposes a cold start recommendation model that integrates contrastive learning, aiming to solve the problem of performance degradation of recommendation systems in cold start scenarios due to the scarcity of user and item…

Information Retrieval · Computer Science 2025-02-07 Jiacheng Hu , Tai An , Zidong Yu , Junliang Du , Yuanshuai Luo

Large multimodal models (LMMs) often struggle to recognize novel concepts, as they rely on pre-trained knowledge and have limited ability to capture subtle visual details. Domain-specific knowledge gaps in training also make them prone to…

Computer Vision and Pattern Recognition · Computer Science 2025-06-06 Yu Zhou , Bingxuan Li , Mohan Tang , Xiaomeng Jin , Te-Lin Wu , Kuan-Hao Huang , Heng Ji , Kai-Wei Chang , Nanyun Peng

Detecting abnormal nodes from attributed networks is of great importance in many real applications, such as financial fraud detection and cyber security. This task is challenging due to both the complex interactions between the anomalous…

Machine Learning · Computer Science 2023-10-02 Jiaqiang Zhang , Senzhang Wang , Songcan Chen

We study policy evaluation problems in multi-task reinforcement learning (RL) under a low-rank representation setting. In this setting, we are given $N$ learning tasks where the corresponding value function of these tasks lie in an…

Machine Learning · Computer Science 2025-03-05 Yitao Bai , Sihan Zeng , Justin Romberg , Thinh T. Doan

Embracing the deep learning techniques for representation learning in clustering research has attracted broad attention in recent years, yielding a newly developed clustering paradigm, viz. the deep clustering (DC). Typically, the DC models…

Machine Learning · Computer Science 2022-01-17 Shuai Chang

Value decomposition methods have gained popularity in the field of cooperative multi-agent reinforcement learning. However, almost all existing methods follow the principle of Individual Global Max (IGM) or its variants, which limits their…

Multiagent Systems · Computer Science 2023-05-18 Zhiwei Xu , Bin Zhang , Dapeng Li , Guangchong Zhou , Zeren Zhang , Guoliang Fan