  We investigate the effect of topological disorder on a system of forced
threshold elements, where each element is arranged on top of complex
heterogeneous networks. Numerical results indicate that the response of the
system to a weak signal can be amplified at an intermediate level of
topological disorder, thus indicating the occurrence of
topological-disorder-induced resonance. Using mean field method, we obtain an
analytical understanding of the resonant phenomenon by deriving the effective
potential of the system. Our findings might provide further insight into the
role of network topology in signal amplification in biological networks.
