  In this paper, we investigate the non-critical fluctuations of (net) charges
and (net) protons in Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 39 and 200 GeV,
using iEBE-VISHNU hybrid model with Poisson fluctuations added in the particle
event generator between hydrodynamics and UrQMD. Various effects, such as
volume fluctuations hadronic evolution and scatterings, resonance decays, as
well as realistic centrality cuts and acceptance cuts have been embedded in our
model calculations. With properly tuned parameters, iEBE-VISHNU roughly
describe the centrality dependent moments and cumulants of (net) charges and
(net) protons measured in experiment. Further comparison simulations show that
the volume fluctuation is the dominant factor to influence the multiplicity
fluctuations, which makes the higher moments of (net) charges largely deviate
from the Poison baselines. We also find that the effects from hadronic
evolutions and resonance decays are pretty small or even negligible for the
multiplicity fluctuations of both (net) charges and (net) protons.
