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Deep neural networks (DNNs) are vulnerable to adversarial examples, which are crafted by adding imperceptible perturbations to inputs. Recently different attacks and strategies have been proposed, but how to generate adversarial examples…

Machine Learning · Computer Science 2021-01-13 Tao Bai , Jun Zhao , Jinlin Zhu , Shoudong Han , Jiefeng Chen , Bo Li , Alex Kot

Recent studies have shown that state-of-the-art deep learning models are vulnerable to the inputs with small perturbations (adversarial examples). We observe two critical obstacles in adversarial examples: (i) Strong adversarial attacks…

Computer Vision and Pattern Recognition · Computer Science 2020-04-02 Xiaoyong Yuan , Pan He , Xiaolin Andy Li , Dapeng Oliver Wu

Deep latent variable models, trained using variational autoencoders or generative adversarial networks, are now a key technique for representation learning of continuous structures. However, applying similar methods to discrete structures,…

Machine Learning · Computer Science 2018-07-02 Jake Zhao , Yoon Kim , Kelly Zhang , Alexander M. Rush , Yann LeCun

Patch-based adversarial attacks were proven to compromise the robustness and reliability of computer vision systems. However, their conspicuous and easily detectable nature challenge their practicality in real-world setting. To address…

Cryptography and Security · Computer Science 2023-11-22 Amira Guesmi , Ruitian Ding , Muhammad Abdullah Hanif , Ihsen Alouani , Muhammad Shafique

Simulating complex physical systems often involves solving partial differential equations (PDEs) with some closures due to the presence of multi-scale physics that cannot be fully resolved. Therefore, reliable and accurate closure models…

Computational Physics · Physics 2020-02-19 Jin-Long Wu , Karthik Kashinath , Adrian Albert , Dragos Chirila , Prabhat , Heng Xiao

In principle, applying variational autoencoders (VAEs) to sequential data offers a method for controlled sequence generation, manipulation, and structured representation learning. However, training sequence VAEs is challenging:…

Machine Learning · Computer Science 2022-12-19 Đorđe Miladinović , Kumar Shridhar , Kushal Jain , Max B. Paulus , Joachim M. Buhmann , Mrinmaya Sachan , Carl Allen

Diffusion probabilistic models (DPMs) have shown remarkable results on various image synthesis tasks such as text-to-image generation and image inpainting. However, compared to other generative methods like VAEs and GANs, DPMs lack a…

Computer Vision and Pattern Recognition · Computer Science 2023-07-13 Yipeng Leng , Qiangjuan Huang , Zhiyuan Wang , Yangyang Liu , Haoyu Zhang

The field of neural generative models is dominated by the highly successful Generative Adversarial Networks (GANs) despite their challenges, such as training instability and mode collapse. Auto-Encoders (AE) with regularized latent space…

Computer Vision and Pattern Recognition · Computer Science 2020-05-19 Arnab Kumar Mondal , Sankalan Pal Chowdhury , Aravind Jayendran , Parag Singla , Himanshu Asnani , Prathosh AP

Assisted by neural networks, reinforcement learning agents have been able to solve increasingly complex tasks over the last years. The simulation environment in which the agents interact is an essential component in any reinforcement…

Machine Learning · Computer Science 2018-09-03 Aqeel Labash , Ardi Tampuu , Tambet Matiisen , Jaan Aru , Raul Vicente

Online Passive-Aggressive (PA) learning is a class of online margin-based algorithms suitable for a wide range of real-time prediction tasks, including classification and regression. PA algorithms are formulated in terms of deterministic…

Machine Learning · Statistics 2015-09-09 Arnold Salas , Stephen J. Roberts , Michael A. Osborne

Variational auto-encoders (VAEs) provide an attractive solution to image generation problem. However, they tend to produce blurred and over-smoothed images due to their dependence on pixel-wise reconstruction loss. This paper introduces a…

Computer Vision and Pattern Recognition · Computer Science 2018-04-30 Salman H. Khan , Munawar Hayat , Nick Barnes

The existence of adversarial examples brings huge concern for people to apply Deep Neural Networks (DNNs) in safety-critical tasks. However, how to generate adversarial examples with categorical data is an important problem but lack of…

Machine Learning · Computer Science 2023-11-08 Han Xu , Pengfei He , Jie Ren , Yuxuan Wan , Zitao Liu , Hui Liu , Jiliang Tang

In this paper, we introduce ControlVAE, a novel model-based framework for learning generative motion control policies based on variational autoencoders (VAE). Our framework can learn a rich and flexible latent representation of skills and a…

Graphics · Computer Science 2022-10-13 Heyuan Yao , Zhenhua Song , Baoquan Chen , Libin Liu

Leveraging machine learning methods to solve constraint satisfaction problems has shown promising, but they are mostly limited to a static situation where the problem description is completely known and fixed from the beginning. In this…

Machine Learning · Computer Science 2025-09-23 Wook Lee , Frans A. Oliehoek

Neural networks are known to be susceptible to adversarial samples: small variations of natural examples crafted to deliberately mislead the models. While they can be easily generated using gradient-based techniques in digital and physical…

Computer Vision and Pattern Recognition · Computer Science 2024-01-18 Haotian Xue , Alexandre Araujo , Bin Hu , Yongxin Chen

Accurately predicting pedestrian trajectories is crucial in applications such as autonomous driving or service robotics, to name a few. Deep generative models achieve top performance in this task, assuming enough labelled trajectories are…

Computer Vision and Pattern Recognition · Computer Science 2025-05-28 Mirko Zaffaroni , Federico Signoretta , Marco Grangetto , Attilio Fiandrotti

Collected and annotated datasets, which are obtained through extensive efforts, are effective for training Deep Neural Network (DNN) models. However, these datasets are susceptible to be misused by unauthorized users, resulting in…

Cryptography and Security · Computer Science 2023-11-23 Fan Xing , Xiaoyi Zhou , Xuefeng Fan , Zhuo Tian , Yan Zhao

Unrestricted adversarial examples (UAEs), allow the attacker to create non-constrained adversarial examples without given clean samples, posing a severe threat to the safety of deep learning models. Recent works utilize diffusion models to…

Machine Learning · Computer Science 2025-04-17 Zeyu Dai , Shengcai Liu , Rui He , Jiahao Wu , Ning Lu , Wenqi Fan , Qing Li , Ke Tang

We propose a new class of physics-informed neural networks, called physics-informed Variational Autoencoder (PI-VAE), to solve stochastic differential equations (SDEs) or inverse problems involving SDEs. In these problems the governing…

Machine Learning · Statistics 2022-11-09 Weiheng Zhong , Hadi Meidani

Persona-based dialogue systems aim to generate consistent responses based on historical context and predefined persona. Unlike conventional dialogue generation, the persona-based dialogue needs to consider both dialogue context and persona,…

Computation and Language · Computer Science 2024-01-11 Qiushi Huang , Yu Zhang , Tom Ko , Xubo Liu , Bo Wu , Wenwu Wang , Lilian Tang