6BIN Guangyu, GAO Xiaorong, WANG Yijun, et al. VEP- based brain-computer interfaces: time, frequency, and code modulations [J]. IEEE Comput Intel Mag, 2009, 4(4) : 22- 26.
7WOLPAW J R, BIRBAUMER N, MCFARLAND D J, et al. Brain-computer interfaces for communication and control [J]. Clin Neurophys, 2002, 113(6): 767-791.
8MOLLER-PUTZ G R, SCHERER R, BRAUNEIS C, et al. Steady-state visual evoked potential (SSVEP)-based commu- nication: impact of harmonic frequency components [J]. J Neur Eng, 2005, 2(4):123-130.
9HUANG N E, SHEN Z, LONG S R, et al. The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis [J]. Proc R Soc Lond A, 1998, 454(1971): 903-995.
10HUANG Manling, WU Pingdong, LIU Ying, et al. Applica- tion and contrast in brain-computer interface between Hilbert- Huang transform and wavelet transform [C]//The 9th Inter- national Conference for Young Computer Scientists, 2008. ICYCS 2008. Hunan: 2008: 1706-1710.
