http://arxiv.org/abs/1805.05781
"Active Semi-supervised Transfer Learning (ASTL) for Offline BCI Calibration. (arXiv:1805.05781v1 [cs.LG])"
"Because of individual differences..some subject-specific..data are required to tailor the classifier for each subject. Transfer learning has been extensively used to reduce..calibration data requirement, by making use of auxiliary data from similar..subjects/tasks. However, all previous research assumes that.. auxiliary data have been labeled." #ML