\begin{document}$ 3 \leq \sqrt{s_{NN}} \leq 9.2 $\end{document} GeV. The beam energy, centrality, and rapidity width dependence of proton (factorial) cumulants, up to the \begin{document}$ 4^{\rm th} $\end{document} order, were extracted from the calculations of a hadronic transport model called the ultra-relativistic quantum molecular dynamics (UrQMD) model. In addition, the effects of the initial volume fluctuation are discussed. These results will be important for the physics analysis of the RHIC Beam Energy Scan (BES) data, particularly for the fixed-target data and experimental data from future CBM experiments at FAIR."> UrQMD simulations of higher-order cumulants in Au+Au collisions at high baryon density -
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