Using five spacecraft in geosynchronous orbit, plasmaspheric drainage plumes are located in the dayside magnetosphere and the measured pitch angle anisotropies of radiation belt electrons are compared duskward and dawnward of the plumes. Two hundred twenty-six plume crossings are analyzed. It is found that the radiation belt anisotropy is systematically greater dawnward of plumes (before the el...

In this paper, a new type of multi-variable compensation control method for the wind energy conversion systems (WECS) is presented. Based on wind energy conversion systems, combining artificial neural network (ANN) control and PID, a new type of PID NN intelligent controller for steady state torque of the wind generator is designed, by which the steady state torque output is regulated to track ...

A model bacterium with a flexible flagellar hook generically swims along helical trajectory, even when incorporating detailed hydrodynamics. bifurcation in the hook's equilibrium bending angle below critical stiffness can have dramatic effect on trajectory's pitch angle. Analytical predictions for bifurcation's dependence spontaneous curvature, shape of cell body, and flagellum geometry are pro...

Low frequency magnetic fluctuations generated by solar wind/cometary ion distributions cause pitch-angle scattering of cometary ions. The nature of this pitch angle scattering is examined by means of one-dimensional hybrid simulations, in which newborn ions are created at a constant rate, and for various injection angles, o•, relative to the magnetic field. Pitch angie scattering in the quasipe...

Abstract As the fundamental physical process with many astrophysical implications, diffusion of cosmic rays (CRs) is determined by their interaction magnetohydrodynamic (MHD) turbulence. We consider magnetic mirroring effect arising from MHD turbulence on CRs. Due to intrinsic superdiffusion turbulent fields, CRs large pitch angles that undergo mirror reflection, i.e., bouncing CRs, are not tra...

aircraft regarding to the elevator deflection angle is designed. The way how the elevator angle affects pitching motion of the aircraft is pointed out, as well as, how a pitch controller can be applied for the aircraft to reach certain pitch angle. In this digital optimal system, the elevator deflection angle and pitching angle of the plane are considered to be input and output respectively. A ...