南京大学学报(自然科学版) ›› 2024, Vol. 60 ›› Issue (1): 6575.doi: 10.13232/j.cnki.jnju.2024.01.007
Liuyi Ling1,2(), Weixiao Li1, Bin Feng1,2
摘要:
运动想象脑电(Motor Imagery Electroencephalogram,MI?EEG)已经应用在脑机接口(Brain Computer Interface,BCI)中,能帮助上下肢功能障碍的患者进行康复训练.然而,现有技术对MI?EEG低效的解码性能和对MI?EEG过度依赖预处理的方式限制了BCI的广泛发展.提出了一种多模型融合的时空特征运动想象脑电解码方法(Multi?model Fusion Temporal?spatial Feature Motor Imagery EEG Decoding Method,MMFTSF).MMFTSF使用时空卷积网络提取MI?EEG中浅层信息特征,使用多头概率稀疏自注意力机制关注MI?EEG中最具有价值的信息特征,使用时间卷积网络提取MI?EEG高维时间特征,使用带有softmax分类器的全连接层对MI?EEG进行分类,并利用基于卷积的滑动窗口和空间信息增强模块进一步提升MI?EEG解码性能.在公开的BCI竞赛数据集IV?2a上进行验证.实验结果表明,MMFTSF在数据集上达到89.03%的解码准确度,在MI?EEG分类任务中具有理想的分类性能.
中图分类号:
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