Hao Zhang

TL;DR: In this article, an eco-friendly technique for the preparation of silver nanoparticles (AgNPs) using seed extract of Alpinia katsumadai, and the evaluation of their antioxidant, antibacterial, and cytotoxicity activities were reported.

TL;DR: In this paper, a novel nonlinear fractional-order mathematical model was established to study the stability of a hydro-turbine-generator unit in further depth, and the effect of the fractional order damping force on bifurcation points, the orbit of centroid of the rotor, the power and the frequency of rotor were analyzed.

TL;DR: An active sliding mode control method for synchronizing two chaotic systems with parametric uncertainty is presented, and a sufficient condition is drawn for the robust stability of the error dynamics and is applied to guiding the design of the controllers.

TL;DR: In this article, the authors proposed a universal dynamic mathematical model of the multi-hydro-turbine governing system, which is fitted into the theoretical framework of the generalized Hamiltonian system, utilizing the method of orthogonal decomposition.

TL;DR: In this article, a nonlinear dynamical model of a hydro-turbine governing system in the process of load rejection transient is presented. And the nonlinear dynamic behaviors of the governing system are illustrated by bifurcation diagrams, Poincare maps, time waveforms and phase orbits.