[1] Hopfield J 1984 Proc. Nat. Acad. Sci. 41 3088
[2] Yang Z, Xu D 2005 IEEE Trans. Circu. Syste. 52 517
[3] Liao X, Chen G, Sanchez E N 2002 Neural Networks 15 855
[4] Wang L, Xu D 2003 Science in China 46 466
[5] Cao J, Xiao M 2007 IEEE Trans. Neural Net. 18 416
[6] Kwon O, Kwon J, Kim S 2011 Chin. Phys. B 20 050505
[7] Lee S, Kwon O, Park J 2010 Chin. Phys. B 19 050507
[8] Li H, Liao X, Huang H 2011 Acta Phys. Sin. 60 020512 (in Chinese) [李华青, 廖晓峰, 黄宏宇 2011 物理学报 60 020512]
[9] Wang H, Yu J 2001 Acta Phys. Sin. 50 2303 (in Chinese) [王宏霞, 虞厥邦 2001 物理学报 50 2303]
[10] Wang Z, Zhang H, Wang L 2006 Acta Phys. Sin. 55 2687 (in Chinese) [王占山, 张化光, 王智良 2006 物理学报 55 2687]
[11] Wheeler D W, Schieve W C 1997 Physica D 105 267
[12] Yi L, Zhou X, Wu Y, Zhou M 2006 Chaos, Solitons & Fractals 29 190
[13] Zhao H, Chen L, Yu X 2011 Acta Phys. Sin. 60 070202 (in Chinese) [赵洪涌, 陈凌, 于小红 2011 物理学报 60 070202]
[14] Yang X, Yang F 2004 Chaos, Solitons & Fractals 20 587
[15] Li C, Chen G, Liao X 2004 The European Physical Journal B 41 337
[16] Liao X, Li S, Wong K 2003 Nonlinear Dynamics 31 299
[17] Liu Q, Liao X, Guo S, Wu Y 2009 Nonlinear Analysis 10 2384
[18] Liu Z, Li C, Liu J 1997 Acta Acustica 22 297 (in Chinese) [刘镇清, 李成林, 刘江伟 1997 声学学报 22 297]
[19] Jiang M, Lin B, Yuan B 1998 Signal Processing 14 331 (in Chinese) [江铭虎, 林碧琴, 袁保宗1998 信号处理 14 331]
[20] Zeng Q, Song A, Huang W 1999 J of Southeast University 29 25 (in Chinese) [曾庆军, 宋爱国, 黄惟一 1999 东南大学学报 29 25]
[21] Ellman R, Cooke K 1963 Differential-Difference Equations (New York Academic Press)