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We investigate a variational method for ill-posed problems, named $\texttt{graphLa+}\Psi$, which embeds a graph Laplacian operator in the regularization term. The novelty of this method lies in constructing the graph Laplacian based on a…

Numerical Analysis · Mathematics 2024-10-22 Davide Bianchi , Davide Evangelista , Stefano Aleotti , Marco Donatelli , Elena Loli Piccolomini , Wenbin Li

Modern social networks frequently encompass multiple distinct types of connectivity information; for instance, explicitly acknowledged friend relationships might complement behavioral measures that link users according to their actions or…

Social and Information Networks · Computer Science 2015-06-17 Brandon Oselio , Alex Kulesza , Alfred O. Hero

Despite substantial progress in no-reference image quality assessment (NR-IQA), previous training models often suffer from over-fitting due to the limited scale of used datasets, resulting in model performance bottlenecks. To tackle this…

Computer Vision and Pattern Recognition · Computer Science 2023-02-21 Jiamu Sheng , Jiayuan Fan , Peng Ye , Jianjian Cao

In this paper we propose a new augmentation technique, called patch augmentation, that, in our experiments, improves model accuracy and makes networks more robust to adversarial attacks. In brief, this data-independent approach creates new…

Computer Vision and Pattern Recognition · Computer Science 2019-11-26 Marcus D. Bloice , Peter M. Roth , Andreas Holzinger

Counterfactual data augmentation (CDA) is a method for controlling information or biases in training datasets by generating a complementary dataset with typically opposing biases. Prior work often either relies on hand-crafted rules or…

Machine Learning · Computer Science 2025-02-26 Mitchell Plyler , Min Chi

We present a method for training a neural network to perform image denoising without access to clean training examples or access to paired noisy training examples. Our method requires only a single noisy realization of each training example…

Image and Video Processing · Electrical Eng. & Systems 2019-10-29 Nick Moran , Dan Schmidt , Yu Zhong , Patrick Coady

Collaborative filtering (CF) recommendation has been significantly advanced by integrating Graph Neural Networks (GNNs) and Graph Contrastive Learning (GCL). However, (i) random edge perturbations often distort critical structural signals…

Machine Learning · Computer Science 2026-03-18 Yixuan Huang , Jiawei Chen , Shengfan Zhang , Zongsheng Cao

Lack of training data presents a grand challenge to scaling out spoken language understanding (SLU) to low-resource languages. Although various data augmentation approaches have been proposed to synthesize training data in low-resource…

Computation and Language · Computer Science 2021-09-06 Yingmei Guo , Linjun Shou , Jian Pei , Ming Gong , Mingxing Xu , Zhiyong Wu , Daxin Jiang

Training of Generative Adversarial Networks (GANs) is notoriously fragile, requiring to maintain a careful balance between the generator and the discriminator in order to perform well. To mitigate this issue we introduce a new…

Computer Vision and Pattern Recognition · Computer Science 2019-10-29 Dan Zhang , Anna Khoreva

Data limitation is one of the most common issues in training machine learning classifiers for medical applications. Due to ethical concerns and data privacy, the number of people that can be recruited to such experiments is generally…

Audio and Speech Processing · Electrical Eng. & Systems 2020-04-14 Bahman Mirheidari , Yilin Pan , Daniel Blackburn , Ronan O'Malley , Traci Walker , Annalena Venneri , Markus Reuber , Heidi Christensen

For proper generalization performance of convolutional neural networks (CNNs) in medical image segmentation, the learnt features should be invariant under particular non-linear shape variations of the input. To induce invariance in CNNs to…

Computer Vision and Pattern Recognition · Computer Science 2020-03-10 Mauricio Orbes Arteaga , Lauge Sørensen , M. Jorge Cardoso , Marc Modat , Sebastien Ourselin , Stefan Sommer , Mads Nielsen , Christian Igel , Akshay Pai

In order to reduce overfitting, neural networks are typically trained with data augmentation, the practice of artificially generating additional training data via label-preserving transformations of existing training examples. While these…

Computer Vision and Pattern Recognition · Computer Science 2019-01-23 Cecilia Summers , Michael J. Dinneen

This paper introduces a novel dual-region augmentation approach designed to reduce reliance on large-scale labeled datasets while improving model robustness and adaptability across diverse computer vision tasks, including source-free domain…

Computer Vision and Pattern Recognition · Computer Science 2025-06-04 Prasanna Reddy Pulakurthi , Majid Rabbani , Celso M. de Melo , Sohail A. Dianat , Raghuveer M. Rao

Data augmentation is a widely used technique in machine learning to improve model performance. However, existing data augmentation techniques in natural language understanding (NLU) may not fully capture the complexity of natural language…

Computation and Language · Computer Science 2023-07-06 Zhengqing Yuan , Xiaolong Zhang , Yue Wang , Xuecong Hou , Huiwen Xue , Zhuanzhe Zhao , Yongming Liu

Data augmentation is an effective way to diversify corpora in machine translation, but previous methods may introduce semantic inconsistency between original and augmented data because of irreversible operations and random subword sampling…

Computation and Language · Computer Science 2025-02-21 Jiashu Yao , Heyan Huang , Zeming Liu , Yuhang Guo

Coherence evaluation aims to assess the organization and structure of a discourse, which remains challenging even in the era of large language models. Due to the scarcity of annotated data, data augmentation is commonly used for training…

Computation and Language · Computer Science 2024-04-02 Dawei Zhu , Wenhao Wu , Yifan Song , Fangwei Zhu , Ziqiang Cao , Sujian Li

The `Signal plus Noise' model for nonparametric regression can be extended to the case of observations taken at the vertices of a graph. This model includes many familiar regression problems. This article discusses the use of the edges of a…

Methodology · Statistics 2009-11-11 Arne Kovac , Andrew D. A. C. Smith

Most real-world knowledge graphs (KG) are far from complete and comprehensive. This problem has motivated efforts in predicting the most plausible missing facts to complete a given KG, i.e., knowledge graph completion (KGC). However,…

Machine Learning · Computer Science 2022-08-17 Zhenwei Tang , Shichao Pei , Zhao Zhang , Yongchun Zhu , Fuzhen Zhuang , Robert Hoehndorf , Xiangliang Zhang

Electronic nose has been proven to be effective in alternative herbal medicine classification, but due to the nature of supervised learning, previous research heavily relies on the labelled training data, which are time-costly and…

Machine Learning · Computer Science 2021-07-20 Li Liu , Xianghao Zhan , Rumeng Wu , Xiaoqing Guan , Zhan Wang , Wei Zhang , Mert Pilanci , You Wang , Zhiyuan Luo , Guang Li

In recent years, semi-supervised graph learning with data augmentation (DA) is currently the most commonly used and best-performing method to enhance model robustness in sparse scenarios with few labeled samples. Differing from homogeneous…

Machine Learning · Computer Science 2022-12-02 Ying Chen , Siwei Qiang , Mingming Ha , Xiaolei Liu , Shaoshuai Li , Lingfeng Yuan , Xiaobo Guo , Zhenfeng Zhu
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