Results 41 to 50 of about 48,016 (315)
Artificial optical emissions at HAARP for pump frequencies near the third and second electron gyro-harmonic [PDF]
, 2005 International audienceHigh-power high-frequency radio waves beamed into the ionosphere cause plasma turbulence, which can accelerate electrons. These electrons collide with the F-layer neutral oxygen causing artificial optical emissions identical to ...
F. T. Djuth +17 more
core +1 more source
IEEE Access, 2020 The problems of sub-synchronous oscillation and high-frequency oscillation related to inter-harmonics need to be solved in intermittent energy generation systems.
Jie Xie +7 more
doaj +1 more source
An improved single phase SPLL with DC and harmonics suppression
Energy Reports, 2023 This paper has proposed an improved single phase software phase lock loop (SPLL) with the ability of grid voltage DC and harmonics components suppression.
Long Xiao, Dongdong Chen
doaj +1 more source
Random PWM Technique Based Two-State Markov Chain for Permanent Magnet Synchronous Motor Control
Applied SciencesOn the basis of the space voltage vector pulse width modulation (SVPWM) technique, the random pulse width modulation (RPWM) technique, which can reduce harmonics, is investigated based on the vector control system of permanent magnet synchronous motor ...
Zhiqiang Wang +4 more
doaj +1 more source
IEEE Access, 2020 Line commutated converter (LCC) has been widely applied in hybrid high voltage direct current (HVDC) transmission system, where the modular multilevel converter (MMC) is applied as receiving end and may induce low order harmonics in DC-link voltage ...
He Huang +5 more
doaj +1 more source
High Frequency Limit for a Chain of Harmonic Oscillators with a Point Langevin Thermostat [PDF]
Archive for Rational Mechanics and Analysis, 2020 We consider an infinite chain of coupled harmonic oscillators with a Langevin thermostat at the origin. In the high frequency limit, we establish the reflection-transmission coefficients for the wave energy for the scattering of the thermostat. To our surprise, even though the thermostat fluctuations are time-dependent, the scattering does not couple ...
Tomasz Komorowski +3 more
openaire +3 more sources
FEBS Open Bio, EarlyView.Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei +3 more
wiley +1 more source
Planar Solid‐State Nanopores Toward Scalable Nanofluidic Integration Based on CMOS Technology
Advanced Engineering Materials, EarlyView.We present a scalable silicon‐based fabrication strategy for planar solid‐state nanopores to enable their integration with complex nanofluidic systems. Prototype devices demonstrate normal voltage‐current characteristics, good noise performance, and appreciable streaming currents. Our CMOS‐compatible fabrication process offers precise geometric control
Ngan Hoang Pham +7 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora +4 more
wiley +1 more source
High Frequency Harmonics Emission in Smart Grids [PDF]
, 2013 The term ‘smart grid‘, is nowadays very often used in many publications and so far has not been explicitly defined, however it refers mainly to such an operation of electricity delivery process that allows to optimize energy efficiency by flexible interconnection of central and distributed generators through transmission and distribution system to ...
openaire +1 more source