 A stochastic perturbation of this system leads to a succession of bursts and interbursts and we characterize their durations using a three dimensional phase-space analysis and numerical simulations.
<meaning-changed>  A stochastic perturbation of this system leads to a succession of bursts and interbursts and we characterize their durations using a three dimensional phase-space analysis and numerical simulations.
 A stochastic perturbation of this system leads to a succession of bursts and interbursts . Each phase corresponds to an exploration of a fraction of the phase-space analysis and numerical simulations.