Before revision:  We use two deterministic quantities, the mean first exit time (MFET) and the first escape probability (FEP), to examine the transition events from low to concentration states under the influences of two types of noise.
After revision:  We compute two deterministic quantities, the mean first exit time (MFET) and the first escape probability (FEP), to examine the transition events from low to concentration states under the influences of two types of noise.