The imbalanced class distribution is one of the main issue in data mining. This problem exists in multi class imbalance, when samples containing in one class are greater or lower than that of other classes. Most existing imbalance learning techniques are only designed and tested for two-class scenarios. The new negative correlation learning (NCL) algorithm for classification ensembles, called A...

NAND flash-based Solid State Devices (SSDs) offer the desirable features of high performance, energy efficiency, and fast growing capacity. Thus, the use of SSDs is increasing in distributed storage systems. A key obstacle in this context is that the natural unbalance in distributed I/O workloads can result in wear imbalance across the SSDs in a distributed setting. This, in turn can have signi...

Classifying non-stationary and imbalanced data streams encompasses two important challenges, namely concept drift and class imbalance. ‘‘Concept drift’’ (or nonstationarity) is changes in the underlying function being learnt, and class imbalance is vast difference between the numbers of instances in different classes of data. Class imbalance is an obstacle for the efficiency of most classifiers...

background: gender preference is prevalent in some communities and using medical techniques to choose the baby’s sex may cause the gender discrimination and gender imbalance in communities. therefore, evaluating the gender preferences and attitudes towards using sex selection technologies seems to be necessary. methods: this cross-sectional study was conducted in avicenna fertility center. part...

In this paper we give a systematic analysis of the relationship between imbalance and overlap as factors influencing classifier performance. We demonstrate that these two factors have interdependent effects and that we cannot form a full understanding of their effects by considering them only in isolation. Although the imbalance problem can be considered a symptom of the small disjuncts problem...

The higher sex ratio at birth and the male marriage squeeze in China are receiving considerable attention. Scholars speculated that they might have a series of negative consequences for public safety, but there is little quantitative evidence. Using data from a survey of 364 villages in rural China, this study explores the challenge of gender imbalance to social order and safety at the village ...

The imbalance and excess loss in multimode interference couplers with fabrication errors are examined. Remarkably, there exists a number of optimum access waveguide widths which give a minimum imbalance. Furthermore, quite low excess loss can be simultaneously achieved by choosing one particular optimum width. It is also shown that paired interference couplers have better imbalance performance ...