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• W3080395176 abstract "The common spatial pattern (CSP) algorithm is a well-recognized spatial filtering method for feature extraction in motor imagery (MI)-based brain–computer interfaces (BCIs). However, due to the influence of nonstationary in electroencephalography (EEG) and inherent defects of the CSP objective function, the spatial filters, and their corresponding features are not necessarily optimal in the feature space used within CSP. In this work, we design a new feature selection method to address this issue by selecting features based on an improved objective function. Especially, improvements are made in suppressing outliers and discovering features with larger interclass distances. Moreover, a fusion algorithm based on the Dempster–Shafer theory is proposed, which takes into consideration the distribution of features. With two competition data sets, we first evaluate the performance of the improved objective functions in terms of classification accuracy, feature distribution, and embeddability. Then, a comparison with other feature selection methods is carried out in both accuracy and computational time. Experimental results show that the proposed methods consume less additional computational cost and result in a significant increase in the performance of MI-based BCI systems." @default.
• W3080395176 created "2020-09-01" @default.
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• W3080395176 date "2021-11-01" @default.
• W3080395176 modified "2023-10-17" @default.
• W3080395176 title "Internal Feature Selection Method of CSP Based on L1-Norm and Dempster–Shafer Theory" @default.
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• W3080395176 doi "https://doi.org/10.1109/tnnls.2020.3015505" @default.
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