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- W4300622067 abstract "AUC (Area under the ROC curve) is an important performance measure for applications where the data is highly imbalanced. Learning to maximize AUC performance is thus an important research problem. Using a max-margin based surrogate loss function, AUC optimization problem can be approximated as a pairwise rankSVM learning problem. Batch learning methods for solving the kernelized version of this problem suffer from scalability and may not result in sparse classifiers. Recent years have witnessed an increased interest in the development of online or single-pass online learning algorithms that design a classifier by maximizing the AUC performance. The AUC performance of nonlinear classifiers, designed using online methods, is not comparable with that of nonlinear classifiers designed using batch learning algorithms on many real-world datasets. Motivated by these observations, we design a scalable algorithm for maximizing AUC performance by greedily adding the required number of basis functions into the classifier model. The resulting sparse classifiers perform faster inference. Our experimental results show that the level of sparsity achievable can be order of magnitude smaller than the Kernel RankSVM model without affecting the AUC performance much." @default.
- W4300622067 created "2022-10-03" @default.
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- W4300622067 date "2016-12-27" @default.
- W4300622067 modified "2023-09-30" @default.
- W4300622067 title "A Sparse Nonlinear Classifier Design Using AUC Optimization" @default.
- W4300622067 doi "https://doi.org/10.48550/arxiv.1612.08633" @default.
- W4300622067 hasPublicationYear "2016" @default.
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