College of Building Environment Engineering;
Zhengzhou University of Light Industry;
Zhengzhou 450002;
China;
.2.College of Artificial Intelligence and Data Science;
Hebei University of Technology;
Tianjin 300130;
China;
intelligent prosthesis; surface electromyography(sEMG); relevance vector machine(RVM); high-order zero-crossing; bat algorithm(BA); locomotion-mode identification;