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Stochastic resonance in a time-delayed asymmetric bistable system with mixed periodic signal 下载免费PDF全文
This paper studies the phenomenon of stochastic resonance
in an asymmetric bistable system with time-delayed feedback and
mixed periodic signal by using the theory of signal-to-noise ratio
in the adiabatic limit. A general approximate Fokker--Planck
equation and the expression of the signal-to-noise ratio are derived
through the small time delay approximation at both fundamental
harmonics and mixed harmonics. The effects of the additive noise
intensity $Q$, multiplicative noise intensity $D$, static asymmetry
$r$ and delay time $\tau$ on the signal-to-noise ratio are
discussed. It is found that the higher mixed harmonics and the
static asymmetry $r$ can restrain stochastic resonance, and the
delay time $\tau $ can enhance stochastic resonance. Moreover, the
longer the delay time $\tau $ is, the larger the additive noise
intensity $Q$ and the multiplicative noise intensity $D$ are, when
the stochastic resonance appears. 相似文献
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混方(配方)问题是为了寻求一种多组元的组分配合,使其在一定工艺条件下获得的产物性能达到最佳。因涉及到组分含量限制、工艺条件、成本约束等特殊性,且实验或生产实际中所积累的数据多为离散和/或不完整数据,加之性能-组分-工艺参数之间的关系复杂,传统的建模与优化方法难以得到满意的效果,特别是要同时优化工艺参数时。 相似文献
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Time evolution of information entropy for a stochastic system with double singularities driven by quasimonochromatic noise 下载免费PDF全文
<正>This paper deals with the time evolution of information entropy for a stochastic system with double singularities driven by quasimonochromatic noise.The dimension of the Fokker-Planck equation is reduced by the linear transformation. The exact expression of the time dependence of information entropy is obtained based on the definition of Shannon’s information entropy.The relationships between the properties of dissipative parameters,system singularity strength parameter,quasimonochromatic noise,and their effects on information entropy are discussed. 相似文献
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