The class imbalance problems have been reported to severely hinder classification performance of many standard learning algorithms, and have attracted a great deal of attention from researchers of different fields. Therefore, a number of methods, such as sampling methods, cost-sensitive learning methods, and bagging and boosting based ensemble methods, have been proposed to solve these problems...

This contribution proposes a powerful technique for two-class imbalanced classification problems by combining the synthetic minority over-sampling technique (SMOTE) and the particle swarm optimisation (PSO) aided radial basis function (RBF) classifier. In order to enhance the significance of the small and specific region belonging to the positive class in the decision region, the SMOTE is appli...

The paper discusses problems of constructing classifiers from imbalanced data. Re-sampling approaches that change the original class distribution are often used to improve performance of classifiers for the minority class. We describe a new approach to selective pre-processing of imbalanced data which combines local over-sampling of the minority class with filtering difficult examples from majo...

Classification with imbalanced datasets supposes a new challenge for researches in the framework of machine learning. This problem appears when the number of patterns that represents one of the classes of the dataset (usually the concept of interest) is much lower than in the remaining classes. Thus, the learning model must be adapted to this situation, which is very common in real applications...

imbalanced-learn is an open-source python toolbox aiming at providing a wide range of methods to cope with the problem of imbalanced dataset frequently encountered in machine learning and pattern recognition. The implemented state-of-the-art methods can be categorized into 4 groups: (i) under-sampling, (ii) over-sampling, (iii) combination of overand under-sampling, and (iv) ensemble learning m...

Support vector machine (SVM) is biased towards the majority class, in some case dataset is class-imbalanced and the bias is even larger for high-dimensional. In order to improve the classification accuracy of SVM on high-dimensional imbalanced data, we combine signal-noise ratio (SNR) and under-sampling technique based on K-means. In this article firstly we apply SNR into feature selection to r...

There is an increasing interest in application of Evolutionary Algorithms to induce classification rules. This hybrid approach can aid in areas that classical methods to rule induction have not been completely successful. One example is the induction of classification rules in imbalanced domains. Imbalanced data occur when some classes heavily outnumbers other classes. Frequently, classical Mac...

Imbalanced classification refers to problems in which there are significantly more instances available for some classes than others. Such scenarios require special attention because traditional classifiers tend be biased towards the majority class has a large number of examples. Different strategies, such as re-sampling, have been suggested improve imbalanced learning. Ensemble methods also pro...

The imbalance and concept drift problems in data streams become more complex multi-class environment, extreme variation class ratio may also exist. To tackle the above problems, Hybrid Sampling Dynamic Weighted-based classification method for Multi-class Imbalanced stream (HSDW-MI) is proposed. HSDW-MI algorithm deals with through hybrid sampling dynamic weighting phases, respectively. In phase...