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A sensor less control approach for permanent magnet synchronous motor (PMSM) with contra-rotating dual rotors was researched in order to obtain simple configuration and reliable performance. First of all, the mathematical model was established on the basis of the characteristic of surface mounted PMSM with contra-rotating dual rotors. Then a rotating speed estimation algorithm of two rotors was presented...
A effective adaptive equalization algorithm has been proposed. The algorithm, which combining modified normalized LMS algorithm with decision feedback equalizer structure, realizes the adaptive equalization of various underwater acoustic channels and is prone to hardware realization on the premise of non-increasing computational complexity. At the same time, a second order digital phase-locked loop...
A new material for solid-phase extraction of Pb(II) was prepared using chemically functionalized silica gel with alizarin violet. This material is stable in 6molL −1 of HCl, 6molL −1 of H 2 SO 4 , common organic solvents and pH 1.0–9.0 aqueous solutions. The influences of analytical parameters including pH of the aqueous solution, amount of the functionalized silica...
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