【摘要】 采用数值模拟的方法研究了乘性和加性噪音对化学振荡体系相干共振的影响作用.结果表明,乘性和加性噪音同时对体系进行调制时,所得的相干共振强于只有其中一种噪音调制的共振;相对于加性噪音而言,体系能更好地利用乘性噪音来增宽使体系处于振荡状态的控制参数区域;控制参数效应和噪音效应相比,前者对体系相干共振的产生和增强起主要的影响作用.另外,当噪音增到临界强度时,乘性和加性噪音分别对体系进行调制的动力学行为差异被湮没,说明此时乘性和加性噪音对体系动力学行为的影响趋于一致.更多还原

【Abstract】 The effects of multiplicative noise and additive noise on the coherence resonance(CR)in chemical oscillation system were studied by numerical simulation method.It is shown that,when the system subjets to additive and multiplicative noises simultaneously,its coherence resonance strength is stronger than that for the system induced by one of the two noises.The system can exploit multiplicative noise better than additive noise to enlarge its control parameter range of the oscillation state.Between the control parameter threshold effect and noise effect,the former plays a dominative role for CR occurrence and enhancement.Moreover,when the system is modulated by multiplicative noise and additive noise,respectively,there exists a critical noise intensity for destroying the difference of the dynamical behaviour between two noises.更多还原