Results 11 to 20 of about 2,729,391 (294)

MULTIPLE HARMONIC PLASMA EMISSION [PDF]

open access: yesThe Astrophysical Journal, 2009
Electromagnetic radiation at the plasma frequency and/or its second harmonic, the so-called plasma emission, is widely accepted as the fundamental process responsible for solar type II and III radio bursts. There have also been occasional observations of higher-harmonic plasma emissions in the solar-terrestrial environment.
Tongnyeol Rhee   +5 more
openaire   +4 more sources

Challenges of Large Converter-Fed Synchronous Machines for Variable-Speed Pumped Hydro Storage

open access: yesEnergies, 2023
The green energy transition of electrical energy production is leading to an increasing share of total energy production for volatile renewable energy sources, mainly wind and solar power. To handle this volatile production, flexible and efficient energy
Stefan Polster   +4 more
doaj   +1 more source

Estimation of Harmonic Emission of Electric Vehicles and Their Impact on Low Voltage Residential Network

open access: yesSustainability, 2021
The EV penetration in the low voltage residential grids is expected to increase rapidly in the coming years. It is expected that EV consumers will prefer overnight home charging because of its convenience and lack of charging infrastructure.
M. N. Iqbal   +4 more
semanticscholar   +1 more source

Active Filter Reference Calculations Based on Customers’ Current Harmonic Emissions

open access: yesEnergies, 2021
This paper deals with harmonics compensation in industrial and distribution networks using an active filter (AcF). When defining the AcF’s reference current, it is important to properly consider the network background harmonic distortion.
Aljaž Špelko   +3 more
doaj   +1 more source

Assessing Time-Varying Harmonic Interactions in a Wind Park

open access: yesIEEE Access, 2021
The harmonic interaction mechanism in a wind park is examined in this paper. The paper investigates the feasibility of a solution to the yet challenging harmonic contribution estimation from multiple sources in a wind park with limited available ...
Vineetha Ravindran   +3 more
doaj   +1 more source

Self-starting harmonic comb emission in THz quantum cascade lasers [PDF]

open access: yes, 2021
Harmonic comb states have proven to be ubiquitous in mid-IR quantum cascade lasers. We report here on robust, pure, self-starting harmonic mode locking in Copper-based double-metal THz quantum cascade lasers.
A. Forrer   +5 more
semanticscholar   +1 more source

Assessment on Harmonic Emission Level of Residential Loads with Symmetry and Volatility Constraints

open access: yesZhongguo dianli, 2020
The accuracy of harmonic emission level assessment of residential loads is affected by background harmonics or three-phase harmonic unbalance. Based on Norton’s and Davinan’s theorem, a model is constructed for assessment of harmonic emission level.
Huaying ZHANG   +5 more
doaj   +1 more source

Engineering of the Second‐Harmonic Emission Directionality with III–V Semiconductor Rod Nanoantennas

open access: yesLaser & Photonics reviews, 2020
The ability to engineer nonlinear optical emission from nanostructures is a key challenge to create efficient and compact components for integrated devices.
G. Saerens   +11 more
semanticscholar   +1 more source

Self-Assembly of Nanodiamonds and Plasmonic Nanoparticles for Nanoscopy

open access: yesBiosensors, 2022
Nanodiamonds have emerged as promising agents for sensing and imaging due to their exceptional photostability and sensitivity to the local nanoscale environment.
Lukas Schmidheini   +5 more
doaj   +1 more source

A Method for Assessing Harmonic Emission Level of Photovoltaic Access Point Considering System-Side Harmonic Voltage Fluctuations

open access: yesZhongguo dianli, 2021
With the extensive application of photovoltaic inverter, the harmonic generated during its operation overlaps with the background harmonic of the system at the access point, which causes harmonic amplification and even resonance problems. It is therefore
Xu ZHANG   +4 more
doaj   +1 more source

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