  Fluctuations of conserved quantities in heavy-ion collisions are used to
probe the phase transition and the QCD critical point for the strongly
interacting hot and dense nuclear matter. The STAR experiment has carried out
moment analysis of net-proton (proxy for net-baryon (B)), net-kaon (proxy for
net-strangeness (S)), and net-charge (Q). These measurements are important for
understanding the quantum chromodynamics phase diagram. We present the analysis
techniques used in the moment analysis by the STAR experiment and discuss the
moments of net-proton and net-charge distributions from the first phase of the
Beam Energy Scan program at the Relativistic Heavy Ion Collider.
