On features of scaling in Duffing oscillator under action of impulses   with random modulation of parameters
  In the work a nonlinear Duffing oscillator is considered under impulse excitation with two ways of introduction of the random additive term simulating noise, - with help of amplitude modulation and modulation of period of impulses sequence. The scaling properties both in the Feigenbaum scenario and in the tricritical case are shown. 
Alexander P. Kuznetsov, Julia V. Sedova