In studies with positron beams in the Advanced Photon Source, a dramatic amplification was observed in the electron cloud for certain bunch current and bunch spacings. In modeling presented previously, we found qualitative agreement with the observed beam-induced multipacting condition, provided reasonable values were chosen for the secondary electron yield parameters, including the energy dist...

This paper is concerned with the problems of global stabilization and restricted tracking for a multiple oscillator systembybounded feedback. A nonlinear feedback law consisting of nested saturation functions is proposed to achieve global stabilization. To improve the transient performance of the closed-loop system, the parameters in this feedback law can be tuned to assign the poles of the clo...

This paper analyzes the Cramér-Rao Bound associated with the estimation of certain sparse hyper-parameters in the Sparse Bayesian Learning (SBL) framework, that crucially control the sparsity of the desired signal. The CRB is shown to exhibit saturation with respect to the number of measurements, i.e., it can be lower bounded by a non-negative quantity that does not go to zero even when the num...

Heart rate and bloody oxygen saturation are significant human's health parameters. This design is a mouse pad monitoring heart rate and oxygen saturation, to reduce the risk of undetected heart state change after concentrating on computer for a long time. Optical power signals reflected by blood are collected by reflective photoelectric sensor, NJL5501R, and then through filtering and amplifica...

IEEE 802.11 standards support multiple data transmission rates with dynamic rate switching capability to improve the performance. With multirate enhancement, data transmission from wireless LAN (WLAN) stations can take place at various rates according to channel conditions. This paper investigates the problem of optimizing aggregate saturation throughput of a multirate WLAN. Analytical expressi...

The linear growth rates of TAE (Toroidal Alfvén Eigenmode) modes destabilised by ICRF (Ion Cyclotron Range of Frequency) heating are calculated over a range of plasma parameters. Nonlinear saturation of a single unstable mode is investigated both analytically and numerically when wave-particle trapping is the dominant saturation mechanism. A numerical code has been developed based on a reduced ...

Based on three-dimensional simulations of the Braginskii equations we show that for typical plasmaedge parameters the saturation of electromagnetic toroidal hi mode turbulence is controlled by the selfgeneration and subsequent annihilation of radial magnetic field perturbations. This should be contrasted with the electrostatic limit, where the growth of the linear hi mode is terminated by the o...

We have used a two-dimensional drift-diffusion simulator, augmented by including accurate low-field mobility curves obtained by the Monte Carlo method, to study the operation of SiC MOSFETs both at room and high temperatures. A comparison with Si MOSFETs at room temperature is performed. Although drain current was higher in Si MOSFETs, SiC MOSFETs showed lower saturation conductance values. The...

This paper introduces a new method to model the permanent magnet synchronous machines (PMSMs) with saliencies due to the salient structure and magnetic saturation. Two parameters are defined to indicate these saliencies, i.e. the structural saliency ratio (Kstr) and the saturation saliency ratio (Ksat). To verify the nonlinear model, a real PMSM is tested and numerically simulated. The nonlinea...

This paper is aimed to determine a general model for simulating the single and two-phase induction machines operation. The objective of this model is to predict motor performance parameters such as torque, and motor speed. The model includes representation of both main and auxiliary winding in stationary reference frame and also the effect of core losses and the saturation of the main flux path...