题目：Consensus of Switched Nonlinear Multi-agent Systems via Event-Triggered Strategies
Event-triggered control, which has received increasing attention, is an effective method to reduce the communication resources. In our study, the event-triggered consensus for switched nonlinear multi-agent systems was investigated. The asynchronous switchings among agents and the more general nonlinearities make the event-triggered consensus problem challenging. Firstly, a new protocol design method was proposed, by which an event-triggered protocol was developed for a class of stochastic switched nonlinear multi-agent systems. Then, we further improved the protocol design method, and applied it to a class of second-order switched nonlinear multi-agent systems. It is proven that the practical consensus of the underlying multi-agent systems can be achieved in the case that any information of deigned auxiliary dynamical systems cannot be transmitted in the communication channels. Finally, two numerical examples were given to illustrate the effectiveness of the proposed event-triggered control schemes.