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Coexisting Attractors and Hopf Bifurcation in Floating Memristors Based Chaotic Circuit
WANG Wei, ZENG Yicheng, CHEN Zheng, SUN Ruiting
CHINESE JOURNAL OF COMPUTATIONAL PHYSICS    2017, 34 (6): 747-756.   DOI: 10.19596/j.cnki.1001-246x.7563
Abstract514)   HTML5)    PDF (6135KB)(1832)      
We propose a novel floating memristor chaotic circuit with serial connection between a charge-controlled memristor and an inductor.Basic dynamic properties of the system are investigated with conventional dynamic analysis method. It shows that the system produces a pair of "heart" type attractors about origin symmetry. Simulation results indicate that strange attractors like bow tie type are observed as voltage and electricity signal in observing chaotic attractors are generalized to power and energy signal. Hopf bifurcation behavior is analyzed and verified by numerical simulation. It shows that the system can produce two bifurcation behaviors by adjusting parameters. They are Hopf bifurcation and anti-period doubling bifurcation. Remarkable feature of the citcuit is that it adopts a floating memristor, and with different initial state it generates nonlinear phenomena including coexisting chaotic and coexisting chaotic-periodic attractors.
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Numerical Verification of the Advantages of the Generalized Characteristic Coordinate System in Computing Expansive Wave and Shock Waves
CHEN Zheng, SHI Jing, WU Zi-niu
CHINESE JOURNAL OF COMPUTATIONAL PHYSICS    2004, 21 (1): 15-20.  
Abstract263)      PDF (217KB)(1183)      
In the generalized characteristic coordinate system(GCCS) proposed by the authors elsewhere, the frame moves at a speed which is a linear combination of the convective speed and the sound speed.This coordinate system is applied to the computation of the one-dimensional Euler equation and the advantages of GCCS is demonstrated in capturing expansive waves and shock waves.
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