Wind turbines are often controlled to harvest the maximum power from wind, which corresponds operation at top of bell-shaped coefficient graph. Such a mode may be achieved implementing an extremum seeking data-based strategy, is invasive technique that requires injection harmonic disturbances. Another approach based on knowledge analytic expression function, information usually unreliably provi...

In a previous paper we have presented CEGAR approach for the verification of parameterized systems with an arbitrary number processes organized in array or ring. The technique is based on iterative computation invariants, i.e., infinite families invariants infinitely many instances system. Safety properties are proved by checking that every global configuration system satisfying all also satisf...

We study the effect of nonlinearity on systems with periodic parity-time (PT) symmetry, and show that nonlinearity can transform the system from broken to full PT symmetry and vice versa. Furthermore, we show that even when the nonlinearity is insufficient to induce a transition from broken to full PT symmetry, still, the wave functions neither decay nor diverge, despite the fact that the syste...

Several recent works have considered parameterized verification, i.e. automatic verification of systems consisting of an arbitrary number of finite-state processes organized in a linear array. The aim of this paper is to extend these works by giving a simple and efficient method to prove safety properties for systems with treelike architectures. A process in the system is a finitestate automato...

In this paper we present a new abstraction technique that enables the usage of model checking for the verification of parameterized systems. The technique targets asynchronous systems. Compared to previous approaches the application of the proposed technique imposes fewer restrictions on the correctness property. Moreover, it can be applied to a class of parameterized systems for which other ab...