In this paper we consider some stabilization problems for the wave equation with switching time-delay. We prove exponential stability results for appropriate damping coefficients. The proof of the main results is based on D’Alembert formula, observability inequality and some energy estimates. More general problems, like the Petrovsky system, are also discussed.

All-to-all communication is one of the most dense communication patterns and occurs in many important applications in parallel computing. In this paper, we present a new all-toall broadcast algorithm in all-port mesh and torus networks. Unlike existing all-to-all broadcast algorithms, the new algorithm takes advantage of overlapping of message switching time and transmission time, and achieves ...

We present an experimental approach to study the ultrafast polarization switching dynamics in thin-film ferroelectrics. A semiconductor photoconductive switch with femtosecond laser illumination is used as a ‘‘pulse generator’’ to produce jitter-free, sub-100 ps rise time step-function-like electrical pulses. Quantitative measurements yield a polarization switching time, ts , of ;220 ps when me...

Uncertain switched linear systems are known as an important class of control systems. Performance of these systems is affected by uncertainties and its stabilization is a main concern of recent studies. Existing work on stabilization of these systems only provides asymptotical stabilization via designing switching strategy and state-feedback controller. In this paper, a new switching strate...

In this paper a new systematic switching control approach to adaptive stabilization of linear time-varying (LTV) discrete-time systems is presented. A feature of the localization-based method is its high model falsification capability, which in the case of LTI systems is manifested as the rapid convergence of the switching controller. We believe that the proposed method may help pave the way fo...

In this paper, the min-time optimal control problem is mainly investigated in the linear time invariant (LTI) continuous-time control system with a constrained input. A high order dynamical LTI system is firstly considered for this purpose. Then the Pontryagin principle and some necessary optimality conditions have been simultaneously used to solve the optimal control problem. These optimality ...

In this chapter a new systematic switching control approach to adaptive stabilization of uncertain discrete-time systems with parametric uncertainty is presented. Our approach is based on a localization method which is conceptually diierent from supervisory adaptive control schemes and other existing switching adaptive schemes. Our approach allows for slow parameter drifting, infrequent large p...

Soft Switcing techniques have recently been applied in the design of dc-ac converters, in order to achive better performance, higher efficiency, and power density. One of the soft switching techniques uesd in inverters is resonant dc links. These topologies have some disadvantages such as irregular current peaks, large voltage peaks, uncotrollble pulse width, etc. Another soft switching method ...

The classical formulation of the transmission switching problem as a mixed-integer is intractable for large systems in real-time control settings. Several heuristics have been proposed past to speed up computation time, which only limits number switchable lines. In this paper, heuristic based on neural networks that provides almost instantaneous actions, are presented. findings shown case studi...