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Puer, China

Liu J.,Qujing Normal University | Luo H.-Y.,Qujing Normal University | Guo Y.-Y.,Yunnan University | Wu B.,Puer University
Applied Mechanics and Materials | Year: 2014

This paper uses the Lyapunov method to study the control system of a class of two-dimensional critical, and acquires the sufficient condition for absolute stability of the two-dimensional critical nonlinear control system. © (2014) Trans Tech Publications, Switzerland. Source

Jia Z.-L.,Yuxi Normal University | Li K.-Y.,Yuxi Normal University | Li C.,Puer University | Yang C.-Y.,Yuxi Normal University | Mei D.-C.,Yunnan University
European Physical Journal B | Year: 2015

The transport properties of an inertial Brownian motor were numerically studied in the presence of recycled noise, which is obtained by re-injecting a fraction of the primary white noise after a processing time, being introduced into the system in a multiplicative way. The simulation results indicate that various parameters such as the external driving force, the friction coefficient, the mass of the particle, the recycling strength, and the delay time can induce the current reversal phenomenon when the sign of the recycling strength is in agreement with the sign of the external bias force, otherwise the current reversal cannot be observed. Additionally, the asymptotic mean velocity as a function of the delay time of the recycled noise always shows a resonance-like behavior with the presence of a maximum current. These results demonstrate that the delay time and the recycling strength of the recycled noise can be used as the feasible and flexible control parameters for the amplitude and direction of the current. © 2015, EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg. Source

Zhu P.,Puer University | Mei D.C.,Yunnan University
European Physical Journal B | Year: 2014

An autonomous stochastic system with nonlinear time-delayed feedback is investigated employing the stochastic simulation method. In the autonomous stochastic system with quadratic time-delayed feedback or under positive feedback, the nonlinear delay time fails to possess the role improving the noisy state of the system. In the autonomous stochastic system with cubic time-delayed feedback and under negative feedback, the nonlinear delay time can improve the noisy state, tuning the signal output, and generating incoherence and coherence maximization. We reveal a new kind of anti-coherence and coherence resonance phenomena induced by the nonlinear time delay in the autonomous stochastic system without external periodic force, discussing further the effects of the noise strength, the control parameter, and the feedback strength on anti-coherence and coherence resonance. © 2014 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg. Source

Lan H.,Xian Jiaotong University | Lan H.,Puer University | Huang H.,Xian Jiaotong University | Chen H.,Xian Jiaotong University | And 4 more authors.
Journal of the Optical Society of America B: Optical Physics | Year: 2015

We mainly investigate four generated four-wave-mixing (FWM) signals, and second-and fourth-order fluorescence (FL) signals, simultaneously in a cascade three-level atomic system of sodium, in which dual electromagnetically induced transparency windows are used to enable transparency of the generated FWM signals. The moving and immobile two-photon dressing effects on theFWMand multi-order FL signals as well as the interaction of dressing effects are studied. Furthermore, we investigate the spontaneous parametric FWM signal and spatial images of the transmitted probe signal modulated by the cross-Kerr nonlinearities effect of the dressing field both experimentally and theoretically. The study may find applications in all-optical communication. © 2015 Optical Society of America. Source

Zhu P.,Puer University | Mei D.C.,Yunnan University
Physica A: Statistical Mechanics and its Applications | Year: 2014

The auto-correlation function and the cross-correlation function of an autonomous stochastic system with time delays are investigated. We obtain the distribution curves of the auto-correlation function Cx(s) and Cy(s), and the cross-correlation function Cxy(s) and Cyx(s) of the stochastic dynamic variables by the stochastic simulation method. The delay time changes prominently the behaviors of the dynamical variables of an autonomous stochastic system, which makes the auto-correlation and the cross-correlation of the autonomous stochastic system alternate oscillate periodically from positive to negative, or from negative to positive, decrease gradually, and finally tends to zero with the decay time. The delay time and the noise strength have important impacts for the auto-correlation and the cross-correlation of the autonomous stochastic delay system. The delay time enhances the auto-correlation and the cross-correlation, on the contrary, the noise strength lowers the auto-correlation and the cross-correlation. Under the time delay, by comparison we further show differences of the auto-correlation and the cross-correlation between the dynamical variables x and y. © 2014 Published by Elsevier B.V. Source

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