色噪声性质对一氧化氮还原反应体系随机共振的影响  

Influence of Properties of Colored Noise on Stochastic Resonance in Pt(100)/NO+CO Reduction System

作　　者：龚玉兵[1] 侯中怀[1] 辛厚文[1] 

机构地区：[1]中国科学技术大学化学物理系

出　　处：《高等学校化学学报》2005年第12期2331-2335,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20173052;20203017;20433050)资助

摘　　要：研究了一定温度条件下和NO气体偏压pNO处在超临界Hopf分岔点附近时,Pt(100)/NO+CO表面催化还原反应体系被色噪声调制后的动力学行为.通过计算机模拟,观察到了色噪声诱导的反应振荡和随机共振现象.探讨了色噪声强度和相关时间对随机共振行为的影响,得到一些新的结果.Under the conditions of constant temperature and the value of NO partial pressure PNo which is tuned close to Hopf bifurcation point, the dynamics of Pt（ 100）/NO ＋ CO system modulated by colored noise is studied. The colored noise-induced oscillations and the stochastic resonance are observed by using numerical simulations. The influences of intensity and correlation time of colored noise on the stochastic resonance are discussed. A novel result is found that the noise intensity for the occurrence of stochastic resonance initially increases and then decreases with increasing the fixed correlation time.

关 键 词：色噪声 随机共振 Pt(100)/NO+CO反应体系 超临界Hopf分岔 

分 类 号：O641[理学—物理化学]