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Deep neural networks (DNNs) are incredibly brittle due to adversarial examples. To robustify DNNs, adversarial training was proposed, which requires large-scale but well-labeled data. However, it is quite expensive to annotate large-scale…

机器学习 · 计算机科学 2019-11-21 Jingfeng Zhang , Bo Han , Gang Niu , Tongliang Liu , Masashi Sugiyama

To protect deep neural networks (DNNs) from adversarial attacks, adversarial training (AT) is developed by incorporating adversarial examples (AEs) into model training. Recent studies show that adversarial attacks disproportionately impact…

机器学习 · 计算机科学 2024-10-17 Fengpeng Li , Kemou Li , Haiwei Wu , Jinyu Tian , Jiantao Zhou

Ad-hoc retrieval models with implicit feedback often have problems, e.g., the imbalanced classes in the data set. Too few clicked documents may hurt generalization ability of the models, whereas too many non-clicked documents may harm…

信息检索 · 计算机科学 2019-10-21 Dae Hoon Park , Yi Chang

Topic models are often used to identify human-interpretable topics to help make sense of large document collections. We use knowledge distillation to combine the best attributes of probabilistic topic models and pretrained transformers. Our…

计算与语言 · 计算机科学 2020-10-07 Alexander Hoyle , Pranav Goel , Philip Resnik

Dialogue Act (DA) classification is a challenging problem in dialogue interpretation, which aims to attach semantic labels to utterances and characterize the speaker's intention. Currently, many existing approaches formulate the DA…

计算与语言 · 计算机科学 2018-11-14 Yao Wan , Wenqiang Yan , Jianwei Gao , Zhou Zhao , Jian Wu , Philip S. Yu

Deep neural networks (DNNs) fail to learn effectively under label noise and have been shown to memorize random labels which affect their generalization performance. We consider learning in isolation, using one-hot encoded labels as the sole…

计算机视觉与模式识别 · 计算机科学 2020-09-18 Fahad Sarfraz , Elahe Arani , Bahram Zonooz

Dynamic topic modeling facilitates the identification of topical trends over time in temporal collections of unstructured documents. We introduce a novel unsupervised neural dynamic topic model named as Recurrent Neural Network-Replicated…

计算与语言 · 计算机科学 2018-07-10 Pankaj Gupta , Subburam Rajaram , Hinrich Schütze , Bernt Andrassy

Ideally, what confuses neural network should be confusing to humans. However, recent experiments have shown that small, imperceptible perturbations can change the network prediction. To address this gap in perception, we propose a novel…

机器学习 · 计算机科学 2018-10-31 Alexander Matyasko , Lap-Pui Chau

Probabilistic topic models are widely used to discover latent topics in document collections, while latent feature vector representations of words have been used to obtain high performance in many NLP tasks. In this paper, we extend two…

计算与语言 · 计算机科学 2018-10-16 Dat Quoc Nguyen , Richard Billingsley , Lan Du , Mark Johnson

Neural language models show vulnerability to adversarial examples which are semantically similar to their original counterparts with a few words replaced by their synonyms. A common way to improve model robustness is adversarial training…

计算与语言 · 计算机科学 2022-03-25 Hanjie Chen , Yangfeng Ji

Remarkable successes were made in Medical Image Classification (MIC) recently, mainly due to wide applications of convolutional neural networks (CNNs). However, adversarial examples (AEs) exhibited imperceptible similarity with raw data,…

图像与视频处理 · 电气工程与系统科学 2024-03-12 Shuai Li , Xiaoguang Ma , Shancheng Jiang , Lu Meng

Adversarial training is an important topic in robust deep learning, but the community lacks attention to its practical usage. In this paper, we aim to resolve a real-world challenge, i.e., training a model on an imbalanced and noisy dataset…

机器学习 · 计算机科学 2023-12-05 Guanlin Li , Kangjie Chen , Yuan Xu , Han Qiu , Tianwei Zhang

Diffusion models (DMs) have achieved remarkable success in text-to-image generation, but they also pose safety risks, such as the potential generation of harmful content and copyright violations. The techniques of machine unlearning, also…

计算机视觉与模式识别 · 计算机科学 2024-10-10 Yimeng Zhang , Xin Chen , Jinghan Jia , Yihua Zhang , Chongyu Fan , Jiancheng Liu , Mingyi Hong , Ke Ding , Sijia Liu

Adversarial training (AT) is an important and attractive topic in deep learning security, exhibiting mysteries and odd properties. Recent studies of neural network training dynamics based on Neural Tangent Kernel (NTK) make it possible to…

机器学习 · 计算机科学 2023-12-06 Guanlin Li , Han Qiu , Shangwei Guo , Jiwei Li , Tianwei Zhang

Generalization performance of trained computer vision systems that use computer graphics (CG) generated data is not yet effective due to the concept of 'domain-shift' between virtual and real data. Although simulated data augmented with a…

计算机视觉与模式识别 · 计算机科学 2017-07-10 V S R Veeravasarapu , Constantin Rothkopf , Ramesh Visvanathan

Deep learning is found to be vulnerable to adversarial examples. However, its adversarial susceptibility in image caption generation is under-explored. We study adversarial examples for vision and language models, which typically adopt an…

计算机视觉与模式识别 · 计算机科学 2021-07-08 Nayyer Aafaq , Naveed Akhtar , Wei Liu , Mubarak Shah , Ajmal Mian

Topic modeling analyzes a collection of documents to learn meaningful patterns of words. However, previous topic models consider only the spelling of words and do not take into consideration the homography of words. In this study, we…

计算与语言 · 计算机科学 2024-10-04 Takashi Shibuya , Takehito Utsuro

Though word embeddings and topics are complementary representations, several past works have only used pretrained word embeddings in (neural) topic modeling to address data sparsity in short-text or small collection of documents. This work…

计算与语言 · 计算机科学 2021-04-20 Pankaj Gupta , Yatin Chaudhary , Hinrich Schütze

Open-domain neural dialogue models have achieved high performance in response ranking and evaluation tasks. These tasks are formulated as a binary classification of responses given in a dialogue context, and models generally learn to make…

计算与语言 · 计算机科学 2021-06-11 Prakhar Gupta , Yulia Tsvetkov , Jeffrey P. Bigham

We present a neural network framework for learning a survival model to predict a time-to-event outcome while simultaneously learning a topic model that reveals feature relationships. In particular, we model each subject as a distribution…

机器学习 · 计算机科学 2024-06-06 George H. Chen , Linhong Li , Ren Zuo , Amanda Coston , Jeremy C. Weiss