<正>Impact dynamics of multi-rigid-body systems with joint friction is considered. Based on the traditional approximate assumption dealing with impact problem,a
<正>Global Schauder estimates for the initial-value parabolic problem of the bi-harmonic type are proved,and the existence and uniqueness of the solutions in th
<正>The effects of the constant excitation on the local bifurcation of the periodic solutions in the 1:2 internal resonant systems were analyzed based on the si