Motor imagery brain-computer interfaces (BCIs) have demonstrated great potential and attract world-spread attentions. Due to the\nnonstationary character of the motor imagery signals, costly and boring calibration sessions must be proceeded before use. This\nprevents them from going into our realistic life. In this paper, the source subjectâ??s data are explored to perform calibration for\ntarget subjects. Model trained on source subjects is transferred to work for target subjects, in which the critical problem to\nhandle is the distribution shift...........................
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