U2Multi-UDA: A Unified Multilevel Multisource Unsupervised Domain Adaptation Method for Motor Imagery.
Motor imagery (MI) is a core paradigm in Brain-computer interface (BCI) research, but its practical application remains limited by intersubject variability and the scarcity of labeled target-domain data. Existing methods usually focus on a single adaptation level, such as domain alignment, feature interaction, or model...