Mean first-passage time of an asymmetric bistable system driven by colour-correlated noise

In this paper, the effect of every parameter (including p, q, r,la, tau) on the mean first-passage time (MFPT) is investigated inan asymmetric bistable system driven by colour-correlated noise. Theexpression of MFPT has been obtained by applying the steepest-descentapproximation. Numerical results show that (1) the intensity ofmultiplicative noise p and the intensity of additive noise q playdifferent roles in the MFPT of the system, (2) suppression appears onthe curve of the MFPT with small la (e.g. la<0.5) but there isa peak on the curve of the MFPT when la is big (e.g. la >0.5),and (3) with different values of r (e.g. r=0.1, 0.5, 1.5), theeffort of tau on the MFPT is diverse.