This paper proposes an impulsive control scheme for chaotic systems consisting of Van der Pol oscillators coupled to linear oscillators （VDPL） based on their Takagi-Sugeno （T-S） fuzzy models. A T-S fuzzy model is ...This paper proposes an impulsive control scheme for chaotic systems consisting of Van der Pol oscillators coupled to linear oscillators （VDPL） based on their Takagi-Sugeno （T-S） fuzzy models. A T-S fuzzy model is utilized to represent the chaotic VDPL system. By using comparison method, a general asymptotical stability criterion by means of linear matrix inequality （LMI） is derived for the T-S fuzzy model of VDPL system with impulsive effects. The simulation results demonstrate the effectiveness of the proposed scheme.展开更多
A class of recharge–discharge oscillator model for the El Ni？o/Southern Oscillation （ENSO） is considered. A stable limit cycle is obtained by transforming the ENSO model into the van der Pol-Duffing equation. We p...A class of recharge–discharge oscillator model for the El Ni？o/Southern Oscillation （ENSO） is considered. A stable limit cycle is obtained by transforming the ENSO model into the van der Pol-Duffing equation. We proved that there exists periodic oscillations in the ENSO recharge–discharge oscillator model.展开更多
Two pieces of news reports on Yangtze Sunken Ship event are analyzed in this essay to prove the influence of context model in news reports discourse by comparative analysis approach. Through illustrating the different...Two pieces of news reports on Yangtze Sunken Ship event are analyzed in this essay to prove the influence of context model in news reports discourse by comparative analysis approach. Through illustrating the different expressions in these reports discourse, the process how cognition(or context model) influences and determines the production and understanding of discourse has been demonstrated.展开更多
为了对满壳层原子双原子分子间的van der Waals势函数进行必要的补充,从稀有气体同核双原子分子He2、Ne2、Ar2、Kr2、Xe2以及同核双原子分子Zn2的TT势参数出发,应用TT势模型和势参数的组合规则计算得到了Zn-RG体系各分子基态的van der W...为了对满壳层原子双原子分子间的van der Waals势函数进行必要的补充,从稀有气体同核双原子分子He2、Ne2、Ar2、Kr2、Xe2以及同核双原子分子Zn2的TT势参数出发,应用TT势模型和势参数的组合规则计算得到了Zn-RG体系各分子基态的van der Waals势,并给出了各分子的光谱参数。计算结果与先前的理论和实验值进行了比较,Zn-He、Zn-Ne、Zn-Ar分子的结果与Bera的CCSD(T)结果符合的较好。最后,针对提高计算结果的精确性问题提出了今后研究的方向。展开更多
文摘This paper proposes an impulsive control scheme for chaotic systems consisting of Van der Pol oscillators coupled to linear oscillators （VDPL） based on their Takagi-Sugeno （T-S） fuzzy models. A T-S fuzzy model is utilized to represent the chaotic VDPL system. By using comparison method, a general asymptotical stability criterion by means of linear matrix inequality （LMI） is derived for the T-S fuzzy model of VDPL system with impulsive effects. The simulation results demonstrate the effectiveness of the proposed scheme.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.40975028 and 41175052)
文摘A class of recharge–discharge oscillator model for the El Ni？o/Southern Oscillation （ENSO） is considered. A stable limit cycle is obtained by transforming the ENSO model into the van der Pol-Duffing equation. We proved that there exists periodic oscillations in the ENSO recharge–discharge oscillator model.
文摘Two pieces of news reports on Yangtze Sunken Ship event are analyzed in this essay to prove the influence of context model in news reports discourse by comparative analysis approach. Through illustrating the different expressions in these reports discourse, the process how cognition(or context model) influences and determines the production and understanding of discourse has been demonstrated.
文摘为了对满壳层原子双原子分子间的van der Waals势函数进行必要的补充,从稀有气体同核双原子分子He2、Ne2、Ar2、Kr2、Xe2以及同核双原子分子Zn2的TT势参数出发,应用TT势模型和势参数的组合规则计算得到了Zn-RG体系各分子基态的van der Waals势,并给出了各分子的光谱参数。计算结果与先前的理论和实验值进行了比较,Zn-He、Zn-Ne、Zn-Ar分子的结果与Bera的CCSD(T)结果符合的较好。最后,针对提高计算结果的精确性问题提出了今后研究的方向。
