  The phase-space of a simple synchronization model is thoroughly investigated.
The model considers two-mode stochastic oscillators, coupled through a
pulse-like interaction controlled by simple optimization rules. A complex phase
space is uncovered as a function of two relevant model parameters that are
related to the optimization threshold and the periods of the two oscillation
modes. Several phases with different periodic global output signals are
identified. It is shown that the system exhibits partial synchronization under
unexpectedly general conditions.
