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- W2023221658 abstract "Feature selection is an essential component of data mining. In many data analysis tasks where the number of data point is much less than the number of features, efficient feature selection approaches are desired to extract meaningful features and to eliminate redundant ones. In the previous study, many data mining techniques have been applied to tackle the above challenging problem. In this paper, we propose a new ℓ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2,1</sub> -norm SVM, that is, multi-class hinge loss with a structured regularization term for all the classes to naturally select features for multi-class without bothering further heuristic strategy. Rather than directly solving the multi-class hinge loss with ℓ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2,1</sub> -norm regularization minimization, which has not been solved before due to its optimization difficulty, we are the first to give an efficient algorithm bridging the new problem with a previous solvable optimization problem to do multi-class feature selection. A global convergence proof for our method is also presented. Via the proposed efficient algorithm, we select features across multiple classes with jointly sparsity, i.e., each feature has either small or large score over all classes. Comprehensive experiments have been performed on six bioinformatics data sets to show that our method can obtain better or competitive performance compared with exiting state-of-art multi-class feature selection approaches." @default.
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- W2023221658 date "2011-12-01" @default.
- W2023221658 modified "2023-10-18" @default.
- W2023221658 title "Multi-Class L2,1-Norm Support Vector Machine" @default.
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- W2023221658 doi "https://doi.org/10.1109/icdm.2011.105" @default.
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