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中国物理学会期刊

延时对色关联噪声诱导的逻辑生长过程的影响

CSTR: 32037.14.aps.57.2699

Influences of time delay on logistic growth process driven by colored correlated noises

CSTR: 32037.14.aps.57.2699
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  • 应用小延时近似方法,研究了色关联噪声诱导的延时逻辑生长过程,得到了肿瘤细胞数的稳态概率分布Pst(x)的近似解析表达式,发现延时τ的变化可以使Pst(x)发生由多极值结构向单极值结构的转换,延时τ还可以使随机系统的平均值〈x〉、二阶矩〈x2〉、归一化涨落Var的极值位置和极值大小发生改变.

     

    The small time-delay approach is applied to logistic growth model when time-delayed feedback and colored correlated noises are included in the system. The steady state probability distribution Pst(x) of the tumor cell number is obtained. It is found that a configuration transition of multiple peaks to a single peak occurs due to the variation of delay time τ. An extremum appears in the curves of the mean of the steady-state tumor cell number 〈x〉, the second moment 〈x2〉, and the normalized variance Var versus λ. The positions and the peak values of the extrema can be effected by the time delay.

     

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