［1］WALDERT S,PISTOHL T,BRAUN C,et al.A review on directional information in neural signals for brain-machine interfaces［J］.J.Physiol(Paris),2009,103(3-5):244- 254.

［2］BLANKERTZ B,TOMIOKA R,LEMM S,et al.Optimizing spatial filters for robust EEG single-trial analysis［J］.IEEE Signal Process Mag,2008,25(1):41-56.
［3］PINEDA J A,ALLISON B Z,VANKOV A.The effects of self-movement,observation and imagination on A rhythms and readiness potentials.(RP′s):toward a brain-computer interface(BCI)［J］.IEEE Trans on Rehabil.Eng,2000,8(2):219-222.

［4］LIAO X,YAO D Z,WU D,et al.Combining spatial filters for the classification of single-trial EEG in a finger movement task［J］.IEEE Trans on Biomed,2007,54(5):821-831.

［5］WANG Y,ZHANG Z,LI T,et al.BCI competition 2003 data set IV:An algorithm based on CSSD and FDA for classifying single-trial EEG［J］.IEEE Trans on Biomed,2004,51(6):1081-1086.

［6］DORNHEGE G,BLANKERTZ B,CURIO G,et al.Combining features for BCI［C］.Cambridge:Proc.of Advances in Neural Information Processing Systems(NIPS02),MIT Press,2003,15:1115-1122.

［7］DORNHEGE G,BLANKERTZ B,CURIO G.Speeding up classification of multi-channel brain-computer spatial patterns for slow cortical potential［C］.Italy:Proc.of the 1st International IEEE EMBS Conference on Neural Engineering,IEEE,2000:594-597.

［8］Fraunhofer-First,Intelligent Data Analysis Group.EEG classification for self-paced key typing ［EB/OL］.［2008-08-20］.(2010-03-10).http://home.ustc.edu.cn/~cplee.

［9］MARTINEZ A M,KAK A C.PCA versus LDA［J］.IEEE Trans on Pattern Analysis and Machine Intelligence,2001,23(2):228-233.