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Imbalanced data represent a distribution with more frequencies of one class (majority) than the other (minority). This phenomenon occurs across various domains, such as security, medical care and human activity. In imbalanced learning,…

Machine Learning · Computer Science 2025-03-25 Hadi Mohammadi , Ehsan Nazerfard , Mostafa Haghir Chehreghani

With the rapidly spreading usage of Internet of Things (IoT) devices, a network intrusion detection system (NIDS) plays an important role in detecting and protecting various types of attacks in the IoT network. To evaluate the robustness of…

Cryptography and Security · Computer Science 2024-03-29 Jesse Atuhurra , Takanori Hara , Yuanyu Zhang , Masahiro Sasabe , Shoji Kasahara

Class imbalance classification is a challenging research problem in data mining and machine learning, as most of the real-life datasets are often imbalanced in nature. Existing learning algorithms maximise the classification accuracy by…

Machine Learning · Computer Science 2018-09-05 Farshid Rayhan , Sajid Ahmed , Asif Mahbub , Md. Rafsan Jani , Swakkhar Shatabda , Dewan Md. Farid

In this research we use a data stream approach to mining data and construct Decision Tree models that predict software build outcomes in terms of software metrics that are derived from source code used in the software construction process.…

Software Engineering · Computer Science 2014-07-10 Russel Pears , Jacqui Finlay , Andy M. Connor

In this work, we employ the Synthetic Minority Oversampling Technique (SMOTE) to generate instances of the minority class of an imbalanced Coronary Artery Disease dataset. We firstly analyze the public dataset Z -- Alizadeh Sani, a dataset…

Medical Physics · Physics 2020-04-09 Ioannis D. Apostolopoulos

The effectiveness of machine learning models, particularly in unbalanced classification tasks, is often hindered by the failure to differentiate between critical instances near the decision boundary and redundant samples concentrated in the…

Machine Learning · Computer Science 2025-09-25 Samir Brahim Belhaouari , Yunis Carreon Kahalan , Humaira Shaffique , Ismael Belhaouari , Ashhadul Islam

In many application domains such as medicine, information retrieval, cybersecurity, social media, etc., datasets used for inducing classification models often have an unequal distribution of the instances of each class. This situation,…

Machine Learning · Computer Science 2022-01-21 Mohamed S. Kraiem , Fernando Sánchez-Hernández , María N. Moreno-García

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…

Machine Learning · Computer Science 2025-07-11 Karen Medlin , Sven Leyffer , Krishnan Raghavan

Many important real-world applications involve time-series data with skewed distribution. Compared to conventional imbalance learning problems, the classification of imbalanced time-series data is more challenging due to high dimensionality…

Machine Learning · Computer Science 2022-04-19 Tuanfei Zhu , Cheng Luo , Jing Li , Siqi Ren , Zhihong Zhang

The key to overcome class imbalance problems is to capture the distribution of minority class accurately. Generative Adversarial Networks (GANs) have shown some potentials to tackle class imbalance problems due to their capability of…

Machine Learning · Computer Science 2020-08-06 Jingyu Hao , Chengjia Wang , Heye Zhang , Guang Yang

There are many real-world classification problems wherein the issue of data imbalance (the case when a data set contains substantially more samples for one/many classes than the rest) is unavoidable. While under-sampling the problematic…

Computer Vision and Pattern Recognition · Computer Science 2018-01-09 John McKay , Isaac Gerg , Vishal Monga

Class imbalance remains a critical challenge in semi-supervised learning (SSL), especially when distributional mismatches between labeled and unlabeled data lead to biased classification. Although existing methods address this issue by…

Machine Learning · Computer Science 2025-11-25 Senmao Tian , Xiang Wei , Shunli Zhang

Imbalanced classification is a significant challenge in machine learning, especially in critical applications like medical diagnosis, fraud detection, and cybersecurity. Traditional oversampling techniques, such as SMOTE, often fail to…

Machine Learning · Computer Science 2025-09-16 Mahabubur Rahman Miraj , Hongyu Huang , Ting Yang , Jinxue Zhao , Nankun Mu , Xinyu Lei

In this paper we address imbalanced binary classification (IBC) tasks. Applying resampling strategies to balance the class distribution of training instances is a common approach to tackle these problems. Many state-of-the-art methods find…

Machine Learning · Computer Science 2022-05-31 Vitor Cerqueira , Luis Torgo , Paula Branco , Colin Bellinger

Crash data is often greatly imbalanced, with the majority of crashes being non-fatal crashes, and only a small number being fatal crashes due to their rarity. Such data imbalance issue poses a challenge for crash severity modeling since it…

Machine Learning · Computer Science 2024-04-04 Junlan Chen , Ziyuan Pu , Nan Zheng , Xiao Wen , Hongliang Ding , Xiucheng Guo

The learning from imbalanced data is a deeply studied problem in standard classification and, in recent times, also in multilabel classification. A handful of multilabel resampling methods have been proposed in late years, aiming to balance…

Machine Learning · Computer Science 2018-02-15 Francisco Charte , Antonio J. Rivera , María J. del Jesus , Francisco Herrera

Over 85 oversampling algorithms, mostly extensions of the SMOTE algorithm, have been built over the past two decades, to solve the problem of imbalanced datasets. However, it has been evident from previous studies that different…

Machine Learning · Computer Science 2021-07-16 Saptarshi Bej , Kristian Schultz , Prashant Srivastava , Markus Wolfien , Olaf Wolkenhauer

This research addresses the challenges of handling unbalanced datasets for binary classification tasks. In such scenarios, standard evaluation metrics are often biased by the disproportionate representation of the minority class. Conducting…

Class imbalance (CI) in classification problems arises when the number of observations belonging to one class is lower than the other. Ensemble learning combines multiple models to obtain a robust model and has been prominently used with…

Machine Learning · Computer Science 2023-11-28 Azal Ahmad Khan , Omkar Chaudhari , Rohitash Chandra

Background: Machine learning techniques have been widely used and demonstrate promising performance in many software security tasks such as software vulnerability prediction. However, the class ratio within software vulnerability datasets…

Cryptography and Security · Computer Science 2022-05-03 Rui Shu , Tianpei Xia , Laurie Williams , Tim Menzies
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