homogenous charge compression ignition (hcci) engines hold promise of high fuel efficiency and low emission levels for future green vehicles. but in contrast to gasoline and diesel engines, hcci engines suffer from lack of having direct means to initiate combustion. a combustion timing controller with robust tracking performance is the key requirement to leverage hcci application in production ...

A fractional-order compartmental model was recently used to describe real data of the first wave COVID-19 pandemic in Portugal [Chaos Solitons Fractals 144 (2021), Art. 110652]. Here, we modify that order correct time dimensions and use it investigate third occurred from December 2020 February 2021, has surpassed all previous waves, both number consequences. new fractional optimal control probl...

In this paper, a fractional model for the transmission dynamics of cholera was developed. invariant regions model, solutions were generated. Disease-free and endemic equilibrium points obtained. The basic reproduction number evaluated, sensitivity analysis performed. Under support Pontryagin’s maximum principle, order optimal control Furthermore, an strategy discussed, which minimized total inf...

Fractional optimal control problems via a wide class of fractional operators with general analytic kernel are introduced. Necessary optimality conditions Pontryagin type for the considered problem obtained after proving Gronwall inequality as well results on continuity and differentiability perturbed trajectories. Moreover, Mangasarian sufficient global condition is proved. An illustrative exam...

In this paper, we concentrate on a control system with non-local condition that is governed by Hilfer fractional neutral stochastic evolution hemivariational inequality (HFNSEHVI). By using concepts of the generalized Clarke sub-differential and fixed point theorem for multivalued maps, first demonstrate adequate requirements existence mild solutions to concerned system. Then, limited Lagrange ...