Results 51 to 60 of about 10,262,280 (355)
Asymmetric frequency conversion in nonlinear systems driven by a biharmonic pump [PDF]
, 2014 A novel mechanism of asymmetric frequency conversion is investigated in nonlinear dispersive devices driven parametrically with a biharmonic pump. When the relative phase between the first and second harmonics combined in a two-tone pump is appropriately
Clarke, John +3 more
core +2 more sources
Analysis of the sideband current harmonics and vibro‐acoustics in the PMSM with SVPWM
IET Power Electronics, 2020 To control the high-frequency acoustic noise of the permanent magnet synchronous machine (PMSM) with the space vector pulse-width modulation (SVPWM), an investigation into the mechanism of the sideband vibro-acoustics is presented in this study ...
Zizhen Qiu +4 more
semanticscholar +1 more source
Acoustic Measures Capture Speech Dysfunction in Spinocerebellar Ataxia
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Spinocerebellar ataxias (SCA) are hereditary cerebellar degenerative disorders with a common feature of dysarthria, involving impaired phonatory and articulatory control of speech, thereby affecting social communication. In this study, we investigated whether acoustic measures could objectively measure speech dysfunction and identify
Zena Fadel +5 more
wiley +1 more source
Harmonic currents of finite energy and laminations [PDF]
GAFA Geometric And Functional Analysis, 2005 We introduce, on a complex Kahler manifold (M, ), a notion of energy for harmonic currents of bidegree (1,1). This allows us to define $\int T \wedge T \wedge ^{k-2},$ for positive harmonic currents. We then show that for a lamination with singularities of a compact set in P^2 there is a unique positive harmonic current which minimizes energy.
Fornæss, John Erik, Sibony, Nessim
openaire +3 more sources
International Journal of Adaptive Control and Signal Processing, EarlyView.This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley +1 more source
Random Asymmetric Carrier PWM Method for PMSM Vibration Reduction
IEEE Access, 2020 The underwater noise can be caused by the radial electromagnetic vibration of permanent magnet synchronous motor (PMSM) for electric propulsion. The difficulty in decreasing the underwater noise is not only the high-frequency but also low-frequency ...
Jiaqun Xu, Hongqiang Zhang
doaj +1 more source
Transfer of Energy and Momentum Between Magnetoactive Surface Microstructure and a Solid Object
Advanced Engineering Materials, EarlyView.We demonstrate that magnetoactive multilamellar arrays subjected to a rotating magnetic field can function as platforms for controlled transport of physical objects. Through systematic experimental investigation, we elucidate the underlying physical mechanisms determining the upper limit of the achievable transportation speed in such magnetic “conveyor‐
Arne Geldof +9 more
wiley +1 more source
A Selective Harmonic Current Detection Algorithm Based on Quadrature Theory
Kongzhi Yu Xinxi Jishu, 2015 Aiming at the harmonics current detection methods of power grid, a simple effective harmonics current detection algorithm was introduced based on quadrature theory,and its realization and optimization methods were given.
LI Yu, LANG Fengjie, MA Zhe, WANG Xutao
doaj
Current Harmonic Suppression of BLDC Motor Utilizing Frequency Adaptive Repetitive Controller
Machines, 2022 Compared to the proportional-integral strategy, the repetitive control strategy possesses high suppression ability for the alternating current (AC) harmonics of control signals.
Tianqing Yuan, Yupeng Zhang
doaj +1 more source
Microwave photoresistance in a two-dimensional electron gas with separated Landau levels
, 2011 Theories of microwave-induced resistance oscillations in high-mobility two-dimensional electron gas predict that with decreasing oscillation order $n$ or with increasing frequency $\omega$ the photoresistance maxima should appear closer to the cyclotron ...
Hatke, A. T. +3 more
core +1 more source