研究了由色关联的乘性白噪声和加性白噪声驱动的非对称双稳系统中,色关联及非对称性对平均首次穿越时间的影响.数值结果表明乘性噪声强度α和加性噪声强度D及互相关时间r对首次穿越时间T的影响是一致的,加性和乘性噪声间的互关联强度λ及势阱的非对称性r对T的影响是一致的.τ的增加能提高粒子的逃逸率,λ的增加则减小逃逸率.
In this paper, the effects of colored correlations and asymmetry of the potential on the mean first-passage time(MFPT) are investigated for an asymmetric bistable system driven by multiplicative noise and additive noise. Numerical results show that the intensities of multiplieative and additive noises and the cross-correlation time τ affect the MFPT in the same way, the coupling strength λ and asymmetry r of the potential affected the MFPT in the same way. The increase of τ enhances the escape rate, while increase of λ reduces the escape rate.