{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T05:40:11Z","timestamp":1768714811988,"version":"3.49.0"},"reference-count":32,"publisher":"Wiley","license":[{"start":{"date-parts":[[2018,6,28]],"date-time":"2018-06-28T00:00:00Z","timestamp":1530144000000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Computational Intelligence and Neuroscience"],"published-print":{"date-parts":[[2018,6,28]]},"abstract":"<jats:p>In the study of the brain computer interface (BCI) system, electroencephalogram (EEG) signals induced by different movements of the same joint are hard to distinguish. This paper proposes a novel scheme that combined amplitude-frequency (AF) information of intrinsic mode function (IMF) with common spatial pattern (CSP), namely, AF-CSP to extract motor imagery (MI) features, and to improve classification performance, the second generation nondominated sorting evolutionary algorithm (NSGA-II) is used to tune hyperparameters for linear and nonlinear kernel one versus one twin support vector machine (OVO TWSVM). This model is compared with least squares support vector machine (LS-SVM), back propagation (BP), extreme learning machine (ELM), particle swarm optimization support vector machine (PSO-SVM), and grid search OVO TWSVM (GS OVO TWSVM) on our dataset; the recognition accuracy increased by 5.92%, 22.44%, 22.65%, 8.69%, and 5.75%. The proposed method has helped to achieve higher accuracy in BCI systems.<\/jats:p>","DOI":"10.1155\/2018\/6265108","type":"journal-article","created":{"date-parts":[[2018,6,28]],"date-time":"2018-06-28T19:41:23Z","timestamp":1530214883000},"page":"1-11","source":"Crossref","is-referenced-by-count":8,"title":["Multiclass Motor Imagery Recognition of Single Joint in Upper Limb Based on NSGA- II OVO TWSVM"],"prefix":"10.1155","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2501-4567","authenticated-orcid":true,"given":"Shan","family":"Guan","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering, Northeast Electric Power University, 132012 Jilin, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0883-1461","authenticated-orcid":true,"given":"Kai","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Northeast Electric Power University, 132012 Jilin, 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