Molecular dynamics is used to simulate binary granular of RDX and Al in a revolving drum.It shows that mixing quality is irrelative with filling method.In a drum without baffle plate on the wall,segregation of RDX and Al granule happens due to revolution of drum.With an added baffle plate on the drum wall,mixing effect is increased.Theoretical explanation is given for mixing and segregation.

IHB computation scheme of the periodic solutions for a class of piecewise-linear circuit systems is derived and the relevant numerical simulation is carried out. Phase planes under some specific control parameter values, as well as the system response property within a band of control parameter values, are plotted with the results compared with those of the Runge-Kutta method. It is shown that the IHB computation scheme proves to be an effective way of analyzing nonlinear problems in engineering practice.