Results 11 to 20 of about 306,242 (273)

Study on Harmonic Impedance Estimation and Harmonic Contribution Evaluation Index

open access: yesIEEE Access, 2020
Harmonic impedance estimation and suitable evaluation index selection are the key steps of harmonic contribution evaluation. Most of the traditional harmonic impedance estimation methods are only applicable to the scenario, where the background harmonic ...
Ziteng Liu   +3 more
doaj   +1 more source

Second Harmonic Phase Angle Method Based on WMS for Background-Free Gas Detection

open access: yesIEEE Photonics Journal, 2021
We propose a second harmonic phase angle method (WMS-$\theta _{2f}$) based on wavelength modulation spectroscopy for trace gas detection. WMS-$\theta _{2f}$ exhibits the advantages of background-free and immunity to light intensity fluctuations.
Cunguang Zhu   +4 more
doaj   +1 more source

Aspects of ABJ Theory [PDF]

open access: yes, 2013
In this paper we will analyse the deformation of a ABJ theory in harmonic superspace. So, we will first discuss deformations of the harmonic superspace by a graviphoton background and then study the ABJ theory in this deformed harmonic superspace.
Faizal, Mir
core   +1 more source

Background harmonic superfields inN=2 supergravity [PDF]

open access: yesTheoretical and Mathematical Physics, 1998
A modification of the harmonic superfield formalism in $D=4, N=2$ supergravity using a subsidiary condition of covariance under the background supersymmetry with a central charge ($B$-covariance) is considered. Conservation of analyticity together with the $B$-covariance leads to the appearance of linear gravitational superfields.
openaire   +2 more sources

Resonant plasmonic nanoparticles for multicolor second harmonic imaging [PDF]

open access: yes, 2016
Nanoparticles capable of efficiently generating nonlinear optical signals, like second harmonic generation, are attracting a lot of attention as potential background-free and stable nano-probes for biological imaging.
Accanto, Nicolò   +4 more
core   +2 more sources

Background Independent Duals of the Harmonic Oscillator [PDF]

open access: yesPhysical Review Letters, 2006
We show that a class of topological field theories are quantum duals of the harmonic oscillator. This is demonstrated by establishing a correspondence between the creation and annihilation operators and non-local gauge invariant observables of the topological field theory.
openaire   +3 more sources

Mitigation of background harmonic amplification caused by offshore wind farm long AC cable integration

open access: yesIET Renewable Power Generation, 2022
The high voltage alternating current transmission with submarine cables is the common scheme to integrate offshore wind farms close to the land. Due to the capacitive effect of AC cables, the association of the long AC cables and the onshore grid can ...
Yanqiu Jin   +3 more
doaj   +1 more source

Utility harmonic impedance estimation based on mutual information and data optimization

open access: yes电力工程技术, 2023
Accurate calculation of harmonic impedance is the premise of harmonic control and reasonable division of harmonic responsibility. The existing harmonic impedance estimation methods should meet the conditions that the background harmonic fluctuations are ...
XU Fangwei   +5 more
doaj   +1 more source

Geodesics and geodesic deviation in a two-dimensional black hole [PDF]

open access: yes, 2003
We introduce an exactly solvable example of timelike geodesic motion and geodesic deviation in the background geometry of a well-known two-dimensional black hole spacetime.
Kar, Sayan, Koley, Ratna, Pal, Supratik
core   +2 more sources

Covariant Harmonic Supergraphity for N = 2 Super Yang--Mills Theories [PDF]

open access: yes, 1998
We review the background field method for general N = 2 super Yang-Mills theories formulated in the N = 2 harmonic superspace. The covariant harmonic supergraph technique is then applied to rigorously prove the N=2 non-renormalization theorem as well as ...
A. Galperin   +18 more
core   +2 more sources

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