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Highly imbalanced datasets are ubiquitous in medical image classification problems. In such problems, it is often the case that rare classes associated to less prevalent diseases are severely under-represented in labeled databases,…

计算机视觉与模式识别 · 计算机科学 2022-09-15 Adrian Galdran , Gustavo Carneiro , Miguel A. González Ballester

The rehearsal strategy is widely used to alleviate the catastrophic forgetting problem in class incremental learning (CIL) by preserving limited exemplars from previous tasks. With imbalanced sample numbers between old and new classes, the…

计算机视觉与模式识别 · 计算机科学 2023-08-28 Xiuwei Chen , Xiaobin Chang

Training datasets are crucial for convolutional neural network-based algorithms, which directly impact their overall performance. As such, using a well-structured dataset that has minimum level of bias is always desirable. In this paper, we…

计算机视觉与模式识别 · 计算机科学 2021-06-29 Ekberjan Derman

Although binary classification is a well-studied problem in computer vision, training reliable classifiers under severe class imbalance remains a challenging problem. Recent work has proposed techniques that mitigate the effects of training…

机器学习 · 计算机科学 2024-06-06 Kelsey Lieberman , Shuai Yuan , Swarna Kamlam Ravindran , Carlo Tomasi

Numerous studies attempt to mitigate classification bias caused by class imbalance. However, existing studies have yet to explore the collaborative optimization of imbalanced learning and model training. This constraint hinders further…

机器学习 · 计算机科学 2025-12-30 Chuantao Li , Zhi Li , Jiahao Xu , Jie Li , Sheng Li

Data rebalancing techniques, including oversampling and undersampling, are a common approach to addressing the challenges of imbalanced data. To tackle unresolved problems related to both oversampling and undersampling, we propose a new…

机器学习 · 计算机科学 2025-07-11 Karen Medlin , Sven Leyffer , Krishnan Raghavan

Synthesis planning seeks an efficient sequence of chemical reactions that produce a target molecule. Typically, a pretrained single-step (autoregressive) retrosynthesis model is repeatedly invoked to generate such a sequence. Classifier…

机器学习 · 计算机科学 2026-05-14 Najwa Laabid , Vikas Garg

Most of previous machine learning algorithms are proposed based on the i.i.d. hypothesis. However, this ideal assumption is often violated in real applications, where selection bias may arise between training and testing process. Moreover,…

计算机视觉与模式识别 · 计算机科学 2018-08-24 Zheyan Shen , Peng Cui , Kun Kuang , Bo Li , Peixuan Chen

Class-incremental learning (CIL) in medical image-guided diagnosis requires retaining prior diagnostic knowledge while adapting to newly emerging disease categories, which is critical for scalable clinical deployment. This problem is…

计算机视觉与模式识别 · 计算机科学 2026-03-26 Xinyao Wu , Zhe Xu , Cheng Chen , Jiawei Ma , Yefeng Zheng , Raymond Kai-yu Tong

Encrypted network traffic Classification tackles the problem from different approaches and with different goals. One of the common approaches is using Machine learning or Deep Learning-based solutions on a fixed number of classes, leading…

机器学习 · 计算机科学 2024-03-20 Amir Lukach , Ran Dubin , Amit Dvir , Chen Hajaj

In document classification for, e.g., legal and biomedical text, we often deal with hundreds of classes, including very infrequent ones, as well as temporal concept drift caused by the influence of real world events, e.g., policy changes,…

计算与语言 · 计算机科学 2022-03-16 Ilias Chalkidis , Anders Søgaard

Semi-supervised learning on class-imbalanced data, although a realistic problem, has been under studied. While existing semi-supervised learning (SSL) methods are known to perform poorly on minority classes, we find that they still generate…

计算机视觉与模式识别 · 计算机科学 2021-06-18 Chen Wei , Kihyuk Sohn , Clayton Mellina , Alan Yuille , Fan Yang

Unsupervised cell type identification is crucial for uncovering and characterizing heterogeneous populations in single cell omics studies. Although a range of clustering methods have been developed, most focus exclusively on intrinsic…

人工智能 · 计算机科学 2025-12-12 Liang Peng , Haopeng Liu , Yixuan Ye , Cheng Liu , Wenjun Shen , Si Wu , Hau-San Wong

Objectives To develop and validate a deep learning-based diagnostic model incorporating uncertainty estimation so as to facilitate radiologists in the preoperative differentiation of the pathological subtypes of renal cell carcinoma (RCC)…

图像与视频处理 · 电气工程与系统科学 2023-11-14 Ni Yao , Hang Hu , Kaicong Chen , Chen Zhao , Yuan Guo , Boya Li , Jiaofen Nan , Yanting Li , Chuang Han , Fubao Zhu , Weihua Zhou , Li Tian

Traditional resampling methods for handling class imbalance typically uses fixed distributions, undersampling the majority or oversampling the minority. These static strategies ignore changes in class-wise learning difficulty, which can…

机器学习 · 计算机科学 2026-02-17 Arjun Basandrai , Shourya Jain , K. Ilanthenral

Class imbalance poses a significant challenge in classification tasks, where traditional approaches often lead to biased models and unreliable predictions. Undersampling and oversampling techniques have been commonly employed to address…

This paper focuses on the critical load restoration problem in distribution systems following major outages. To provide fast online response and optimal sequential decision-making support, a reinforcement learning (RL) based approach is…

系统与控制 · 电气工程与系统科学 2024-01-30 Xiangyu Zhang , Abinet Tesfaye Eseye , Bernard Knueven , Weijia Liu , Matthew Reynolds , Wesley Jones

Existing multilingual embedding models often encounter challenges in cross-lingual scenarios due to imbalanced linguistic resources and less consideration of cross-lingual alignment during training. Although standardized contrastive…

计算与语言 · 计算机科学 2026-04-15 Seungyoon Lee , Minhyuk Kim , Seongtae Hong , Youngjoon Jang , Dongsuk Oh , Heuiseok Lim

Computational Super-Resolution (CSR) in fluorescence microscopy has, despite being an ill-posed problem, a long history. At its very core, CSR is about finding a prior that can be used to extrapolate frequencies in a micrograph that have…

计算机视觉与模式识别 · 计算机科学 2026-01-28 Anirban Ray , Vera Galinova , Florian Jug

Class imbalance poses a significant challenge to supervised classification, particularly in critical domains like medical diagnostics and anomaly detection where minority class instances are rare. While numerous studies have explored…

机器学习 · 计算机科学 2025-09-10 Ali Nawaz , Amir Ahmad , Shehroz S. Khan