Results 41 to 50 of about 16,712,159 (288)
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 ...
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Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
LCCR Filter Design Method and High‑Frequency Current Harmonic Suppression in PMSM
Nanjing Hangkong Hangtian Daxue XuebaoThe switching current harmonics caused by pulse width modulation（PWM） leads to overheating of the drive motor in vacuum environment， which affecting the reliability of the molecular pump.
WANG Tianzuo +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch +3 more
wiley +1 more source
Magnitude-Reshaping Strategy for Harmonic Suppression of VSG-Based Inverter Under Weak Grid
IEEE Access, 2020 Driven by inertial demand from the grid, the virtual synchronous generators (VSGs) are widely utilized in distributed generation systems. However, harmonic sources in the distributed generation systems with high grid impedance will cause grid voltage ...
Wen Yang +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali +5 more
wiley +1 more source
, 2006 Current and voltage waveforms of a distribution or a transmission system are not pure sinusoids. There are distortions in these waveforms that consist of a combination of the fundamental frequency, harmonics and high frequency transients.
Zamanan, N. +2 more
core +1 more source
High-frequency vector harmonic mode locking driven by acoustic resonances [PDF]
Optics Letters, 2019 A controllable passive harmonic mode locking (HML) in an erbium-doped fiber laser with a soliton pulse shaping using a single-wall carbon nanotube has been experimentally demonstrated. By increasing the pump power and adjusting the in-cavity polarization controller, we reached the 51st-order harmonic (902 MHz) having the output power of 37 mW.
KBASHI, H +5 more
openaire +3 more sources
Unipolar stitched inverter low-frequency harmonics caused by stitching delay
, 2009 Unipolar switched single-phase inverters experience lower switching losses and generate less electro-magnetic interference (EMI) when compared with bipolar switched inverters.
Sharma, R., Ball, J. A. R.
core +1 more source