中国物理B ›› 2012, Vol. 21 ›› Issue (11): 110504-110504.doi: 10.1088/1674-1056/21/11/110504
肖荣a, 王参军a b, 张林a
Xiao Rong (肖荣)a, Wang Can-Jun (王参军)a b, Zhang Lin (张林 )a
摘要: The steady states and the transient properties of an insect outbreak model driven by Gaussian colored noise are studied in this paper. According to Fokker-Planck equation in the unified colored-noise approximation, we analyse the stationary probability distribution and the mean first-passage time of this model. By numerical analysis, the effects of self-correlation time of insect birth rate and predation rate respectively reveal a manifest population divergence on the insect density. The decrease of the mean first-passage time indicates an enhancement dynamic on the density divergency with colored noise of large self-correlation time based on the insect outbreak model.
中图分类号: (Nonlinear dynamics and chaos)