A new method of modeling discrete networked control systems with both the time-varying delay and packet loss was presented in this paper.The network-induced delay is time-varying and it can be smaller or larger than one sampling period.The feedback controller was designed by free-weighting matrices method and Lyapunov-Krasovskii functional to make the networked control system asymptotically stable.And sufficient conditions were derived.A numerical example is given to illustrate the effectiveness of the proposed approach.
The energy, electronic structure, and magnetic and mechanical properties of LaNi5 compound have been studied by the first-principles method based on the density functional theory. The results show that the calculated lattice parameters of LaNi5 compound are almost the same with the experimental ones, and the compound is easy to form and very stable. The bond between La and Nil atoms is an ionic bond, and electrostatic attraction effect exists between Ni atoms. The farther the distance between Ni atoms in the LaNi5 crystal cell is, the stronger the electrostatic attraction effect is. LaNi5 intermetallic compound is ductile and ferromagnetic. The calculated hardness value of LaNi5 compound is 7.04 GPa, and the calculated elastic properties are close to the experimental results.
