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In this paper, the exact analytical equations for both TM and TE cases are presented, when a varying refractive-index profile’s waveguide is terminated by the perfectly matched layers. In the derivation, the differential transfer matrix method and the matrix similarity transformation are mainly used. Moreover, we deduce the asymptotic solutions for Berenger modes in TM case and they can well act as...
Firstly, the basic principle of space vector pulse width modulation (SVPWM) technology is introduced simply in this paper. Then, simulation model of permanent magnet synchronous traction motor control system is established based on MATLAB/Simulink. The starting and braking characteristics simulation results show that the model is effective, as well as the PI adjuster parameters is appropriate. The...
Adsorption is an efficient treatment process for the phosphate removal. In this study, cetyl trimethylammonium bromide modified bentonite (CTMAB-Bent) were prepared, characterized, and its adsorption properties for phosphate were evaluated in batch experiments. The results showed that the ability of phosphate adsorption by CTMAB-Bent was far more than that of Na-bentonite and raw bentonite. The process...
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