Electrical faults can lead to transient and dynamic excitations of the electromagnetic generator torque in wind turbines.The fast changes in the generator torque lead to load oscillations and Chair rapid changes in the speed of rotation.The combination of dynamic load reversals and changing rotational speeds can be detrimental to gearbox components
A method Default of solving optimal manoeuvre control of linear underactuated mechanical systems is presented.The nonintegrable constraints present in such systems are handled by adding dummy actuators and then by applying Lagrange multipliers to reduce their action to zero.The open- and closed-loop control schemes can be analyzed.The Tights method
Abstract In the study of perturbations around black hole configurations, whether an external source can influence the perturbation behavior is an interesting topic to investigate.When the source acts as an initial pulse, it is intuitively acceptable that the existing quasinormal frequencies will remain unchanged.However, the confirmation of such an
Invertebrates rely on innate immunity, including humoral and cellular immunity, to resist pathogenic infection.Previous studies showed that forkhead box transcription factor O (FOXO) participates in mucosal immune responses of mammals and the gut humoral immune regulation of invertebrates.However, whether FOXO is involved in systemic and cellular i
Five oilseed rape genotypes were tested at three sowing dates and harvested at two developmental phases to determine their effects on green forage yield and yield components during 2013/14 growing season.The highest density of canopy was observed at the third sowing date (86 - Default 157 plants/m2 ).Among five genotypes, AbaKus formed the most pla