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The existing machine learning algorithms for minimizing the convex function over a closed convex set suffer from slow convergence because their learning rates must be determined before running them. This paper proposes two machine learning…

最优化与控制 · 数学 2019-09-02 Kazuhiro Hishinuma , Hideaki Iiduka

Recent works have demonstrated the superiority of supervised Convolutional Neural Networks (CNNs) in learning hierarchical representations from time series data for successful classification. These methods require sufficiently large labeled…

机器学习 · 计算机科学 2023-09-12 Fanling Huang , Yangdong Deng

Imbalanced classification is a well-known challenge faced by many real-world applications. This issue occurs when the distribution of the target variable is skewed, leading to a prediction bias toward the majority class. With the arrival of…

机器学习 · 计算机科学 2023-10-10 Carla Vairetti , José Luis Assadi , Sebastián Maldonado

Data augmentation using generative models has emerged as a powerful paradigm for enhancing performance in computer vision tasks. However, most existing augmentation approaches primarily focus on optimizing intrinsic data attributes -- such…

计算机视觉与模式识别 · 计算机科学 2025-10-29 Jiyu Guo , Shuo Yang , Yiming Huang , Yancheng Long , Xiaobo Xia , Xiu Su , Bo Zhao , Zeke Xie , Liqiang Nie

Deep convolutional neural networks often perform poorly when faced with datasets that suffer from quantity imbalances and classification difficulties. Despite advances in the field, existing two-stage approaches still exhibit dataset bias…

机器学习 · 计算机科学 2023-03-16 Liang Xu , Yi Cheng , Fan Zhang , Bingxuan Wu , Pengfei Shao , Peng Liu , Shuwei Shen , Peng Yao , Ronald X. Xu

Imbalanced Data (ID) is a problem that deters Machine Learning (ML) models for achieving satisfactory results. ID is the occurrence of a situation where the quantity of the samples belonging to one class outnumbers that of the other by a…

Recent advances in generative models, such as diffusion models, have made generating high-quality synthetic images widely accessible. Prior works have shown that training on synthetic images improves many perception tasks, such as image…

计算机视觉与模式识别 · 计算机科学 2024-04-18 Jacob Schnell , Jieke Wang , Lu Qi , Vincent Tao Hu , Meng Tang

Imbalanced node classification widely exists in real-world networks where graph neural networks (GNNs) are usually highly inclined to majority classes and suffer from severe performance degradation on classifying minority class nodes.…

人工智能 · 计算机科学 2023-05-01 Jie Liu , Mengting He , Guangtao Wang , Nguyen Quoc Viet Hung , Xuequn Shang , Hongzhi Yin

Deep neural network models have demonstrated their effectiveness in classifying multi-label data from various domains. Typically, they employ a training mode that combines mini-batches with optimizers, where each sample is randomly selected…

机器学习 · 计算机科学 2024-03-28 Ao Zhou , Bin Liu , Jin Wang , Grigorios Tsoumakas

Visual scene graph generation is a challenging task. Previous works have achieved great progress, but most of them do not explicitly consider the class imbalance issue in scene graph generation. Models learned without considering the class…

计算机视觉与模式识别 · 计算机科学 2020-11-10 Jingyi Zhang , Yong Zhang , Baoyuan Wu , Yanbo Fan , Fumin Shen , Heng Tao Shen

State-of-the-art deep learning methods have shown a remarkable capacity to model complex data domains, but struggle with geospatial data. In this paper, we introduce SpaceGAN, a novel generative model for geospatial domains that learns…

机器学习 · 计算机科学 2019-05-24 Konstantin Klemmer , Adriano Koshiyama , Sebastian Flennerhag

Real-world datasets are often biased with respect to key demographic factors such as race and gender. Due to the latent nature of the underlying factors, detecting and mitigating bias is especially challenging for unsupervised machine…

机器学习 · 计算机科学 2020-07-01 Kristy Choi , Aditya Grover , Trisha Singh , Rui Shu , Stefano Ermon

The usage of medical image data for the training of large-scale machine learning approaches is particularly challenging due to its scarce availability and the costly generation of data annotations, typically requiring the engagement of…

计算机视觉与模式识别 · 计算机科学 2024-06-26 Joshua Niemeijer , Jan Ehrhardt , Hristina Uzunova , Heinz Handels

Early detection of breast cancer has a major contribution to curability, and using mammographic images, this can be achieved non-invasively. Supervised deep learning, the dominant CADe tool currently, has played a great role in object…

图像与视频处理 · 电气工程与系统科学 2019-09-06 Basel Alyafi , Oliver Diaz , Robert Marti

Classification tasks require a balanced distribution of data to ensure the learner to be trained to generalize over all classes. In real-world datasets, however, the number of instances vary substantially among classes. This typically leads…

机器学习 · 计算机科学 2020-11-24 Joel Jang , Yoonjeon Kim , Kyoungho Choi , Sungho Suh

Despite the surge of deep learning in the past decade, some users are skeptical to deploy these models in practice due to their black-box nature. Specifically, in the medical space where there are severe potential repercussions, we need to…

计算机视觉与模式识别 · 计算机科学 2022-04-19 Amil Dravid , Florian Schiffers , Boqing Gong , Aggelos K. Katsaggelos

In this paper, we propose a novel data augmentation technique called GenMix, which combines generative and mixture approaches to leverage the strengths of both methods. While generative models excel at creating new data patterns, they face…

计算机视觉与模式识别 · 计算机科学 2024-07-18 Hansang Lee , Haeil Lee , Helen Hong

The accurate automated classification of variable stars into their respective sub-types is difficult. Machine learning based solutions often fall foul of the imbalanced learning problem, which causes poor generalisation performance in…

天体物理仪器与方法 · 物理学 2020-03-18 Zafiirah Hosenie , Robert Lyon , Benjamin Stappers , Arrykrishna Mootoovaloo , Vanessa McBride

Generative Adversarial networks (GANs) have obtained remarkable success in many unsupervised learning tasks and unarguably, clustering is an important unsupervised learning problem. While one can potentially exploit the latent-space…

机器学习 · 计算机科学 2019-01-29 Sudipto Mukherjee , Himanshu Asnani , Eugene Lin , Sreeram Kannan

Class imbalance in a dataset is a major problem for classifiers that results in poor prediction with a high true positive rate (TPR) but a low true negative rate (TNR) for a majority positive training dataset. Generally, the pre-processing…

机器学习 · 计算机科学 2022-03-29 Anuraganand Sharma , Prabhat Kumar Singh , Rohitash Chandra