Landing gear is one of the important components of Chang’E-3 Probe.The device was used to absorb the impact energy of Chang’E-3 Probe during the landing proce
This paper is concerned with a delayed SIRS epidemic model with a nonlinear incidence rate. The main results are given in terms of local stability and Hopf bifu
In a recent article by Liu,Pei,and Zhu,Lie bialgebra structures on the twisted Heisenberg-Virasoro algebra were determined. By disposing the indexing set, the g