Frontiers

Sleep too much or too little and you might get sick more, scientists find

Patients visiting their GP who reported sleeping less than six hours or more than nine were more likely to present with an infection. Patients who reported sleeping too little, or having insomnia or a ...
IEEE

Problems of Extended State Observer and Proposal of Compensation Function Observer for Unknown Model and Application in UAV

Abstract: The extended state observer (ESO) used to estimate the unknown model for nonlinear systems has been widely applied in model-free control. In the ESO, three factors: 1) nonderivative ...
IEEE

Enhanced Recurrent Fuzzy Neural Fault-Tolerant Synchronization Tracking Control of Multiple Unmanned Airships via Fractional Calculus and Fixed-Time Prescribed Performance Function

Abstract: This article proposes a fractional-order intelligent fault-tolerant synchronization tracking control (FO-I-FTSTC) scheme for multiple unmanned airships (UAs) against actuator faults. Within ...