Two-timescale neurodynamic approaches to supervised feature selection based on alternative problem formulations. (October 2021)

• Record Type: Journal Article
• Authors: Wang, Yadi; Wang, Jun; Che, Hangjun
• Is Part Of: Neural networks. Volume 142(2021)
• Page Start: 180
• Page End: 191
• Publication Date: 2021-10
• Subjects: Feature selection -- Recurrent neural networks -- Neurodynamic optimization -- Two-timescale neurodynamics; Neural computers -- Periodicals; Neural networks (Computer science) -- Periodicals; Neural networks (Neurobiology) -- Periodicals; Nervous System -- Periodicals; Ordinateurs neuronaux -- Périodiques; Réseaux neuronaux (Informatique) -- Périodiques; Réseaux neuronaux (Neurobiologie) -- Périodiques; Neural computers; Neural networks (Computer science); Neural networks (Neurobiology); Periodicals; 006.32
• DOI: 10.1016/j.neunet.2021.04.038
• Languages: English
• ISSNs: 0893-6080

Abstract

Abstract: Feature selection is a crucial step in data processing and machine learning. While many greedy and sequential feature selection approaches are available, a holistic neurodynamics approach to supervised feature selection is recently developed via fractional programming by minimizing feature redundancy and maximizing relevance simultaneously. In view that the gradient of the fractional objective function is also fractional, alternative problem formulations are desirable to obviate the fractional complexity. In this paper, the fractional programming problem formulation is equivalently reformulated as bilevel and bilinear programming problems without using any fractional function. Two two-timescale projection neural networks are adapted for solving the reformulated problems. Experimental results on six benchmark datasets are elaborated to demonstrate the global convergence and high classification performance of the proposed neurodynamic approaches in comparison with six mainstream feature selection approaches.