Feature Selection for Genomic Signal Processing: Unsupervised, Supervised, and Self-Supervised Scenarios
Identifieur interne : 002A84 ( Main/Exploration ); précédent : 002A83; suivant : 002A85Feature Selection for Genomic Signal Processing: Unsupervised, Supervised, and Self-Supervised Scenarios
Auteurs : S. Y. Kung [États-Unis, République populaire de Chine] ; Yuhui Luo [États-Unis] ; Man-Wai MakSource :
- Journal of Signal Processing Systems [ 1939-8018 ] ; 2010-10-01.
English descriptors
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Abstract
Abstract: An effective data mining system lies in the representation of pattern vectors. For many bioinformatic applications, data are represented as vectors of extremely high dimension. This motivates the research on feature selection. In the literature, there are plenty of reports on feature selection methods. In terms of training data types, they are divided into the unsupervised and supervised categories. In terms of selection methods, they fall into filter and wrapper categories. This paper will provide a brief overview on the state-of-the-arts feature selection methods on all these categories. Sample applications of these methods for genomic signal processing will be highlighted. This paper also describes a notion of self-supervision. A special method called vector index adaptive SVM (VIA-SVM) is described for selecting features under the self-supervision scenario. Furthermore, the paper makes use of a more powerful symmetric doubly supervised formulation, for which VIA-SVM is particularly useful. Based on several subcellular localization experiments, and microarray time course experiments, the VIA-SVM algorithm when combined with some filter-type metrics appears to deliver a substantial dimension reduction (one-order of magnitude) with only little degradation on accuracy.
Url:
DOI: 10.1007/s11265-008-0273-8
Affiliations:
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