Zh. Hou et Hw. Xin, Enhancement of internal signal stochastic resonance by noise modulation inthe CSTR system, J PHYS CH A, 103(31), 1999, pp. 6181-6183
A two-variable model, which was proposed to describe a first-order, exother
mic. irreversible reaction A --> B carried out in a continuous stirred tank
reactor (CSTR), is investigated when the control parameter is perturbed by
Gaussian shot noise, which contains a constant delay tau, near the supercr
itical Hopf bifurcation point. Noise-induced coherent oscillation (NICO) is
observed, the strength of which goes through a maximum with the increment
of the noise intensity, showing the occurrence of internal signal stochasti
c resonance (ISSR). Furthermore, the NICO strength also shows resonance beh
avior with the variation of tau, indicating an accessible way to enhance IS
SR by noise modulation. These behaviors are also observed when the noise de
lay is exponentially distributed.