Aiming at the position and attitude tracking of coaxial rotor aircraft (CRA), this paper proposes a combinatorial control method of sliding mode control (SMC) coupled with proportional-integral-derivative control (PIDC).Considering the complete description of flight dynamics, aerodynamics and airflow interference, the dynamical model of CRA is esta
This is a case study on the influence of the lower part of road vehicles on the global drag characteristics.Reducing overall drag by redesigning the lower part of the road vehicles has a potential of Gift Bags almost 20% in the overall drag breakdown, mainly due to the viscous effects and the fluidic interaction of the flow under the car with the t
Cardiogenic oscillation during mechanical ventilation can auto-trigger the ventilator resembling patient initiated breadth.This gives a false sense of intact respiratory drive and determination brain death, even if other tests are positive, is not appropriate in such a situation.It will prolong the ICU stay and confound the brain-death determinatio
Background and Objective: Hydrolysis of fat, oil and grease by ultrasonic waves is a pre-treatment method before anaerobic digestion which can change their physical, chemical and biological properties.The main purpose of this study was to investigate the efficiency of ultrasonic waves to improve the hydrolysis process and its use as an auxiliary su