[1] [1] WANG W,ZENG Y C,CHEN Z,et al. Coexisting attractors and Hopf bifurcation in floating memristor based chaotic circuit[J]. Chinese Journal of Computational Physics, 2017,34(6):747-756. DOI:10.19596/j.cnki.1001-246x.7563.

          WANG W,ZENG Y C,CHEN Z,et al. Coexisting attractors and Hopf bifurcation in floating memristor based chaotic circuit[J]. Chinese Journal of Computational Physics, 2017,34(6):747-756. DOI:10.19596/j.cnki.1001-246x.7563.

[2] [2] CHEN W L,HU S W,LIU X Z,et al. A non common-node chaotic Colpitts oscillator with negative resistance enhancement[J]. IEICE Electronics Express, 2014,11(22):1-6. DOI:10.1587/elex.11.20140902.

          CHEN W L,HU S W,LIU X Z,et al. A non common-node chaotic Colpitts oscillator with negative resistance enhancement[J]. IEICE Electronics Express, 2014,11(22):1-6. DOI:10.1587/elex.11.20140902.

[4] [4] LINDBERG E,TAMASEVI.IUS A,MYKOLAITIS G,et al. Towards threshold frequency in chaotic Colpitts oscillator[J]. International Journal of Bifurcation and Chaos, 2007,17(10):3449-3453.DOI: 10.1142/S0218127407019196.

          LINDBERG E,TAMASEVI.IUS A,MYKOLAITIS G,et al. Towards threshold frequency in chaotic Colpitts oscillator[J]. International Journal of Bifurcation and Chaos, 2007,17(10):3449-3453.DOI: 10.1142/S0218127407019196.

[16] [16] CHEN M,SUN M X,BAO B C,et al. Controlling extreme multistability of memristor emulator-based dynamical circuit in flux-charge domain[J]. Nonlinear Dynamics, 2018,91(2):1395-1412.

          CHEN M,SUN M X,BAO B C,et al. Controlling extreme multistability of memristor emulator-based dynamical circuit in flux-charge domain[J]. Nonlinear Dynamics, 2018,91(2):1395-1412.