Results 61 to 70 of about 110,149 (199)
CoRR, 2015 In this paper, we consider the harmonic extension problem, which is widely used in many applications of machine learning. We find that the transitional method of graph Laplacian fails to produce a good approximation of the classical harmonic function. To tackle this problem, we propose a new method called the point integral method (PIM).
Zuoqiang Shi +2 more
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Optimization of passive filtering systems used for mitigating harmonics in distribution networks
, 2016 Many optimization techniques have been applied not just to reduce the effects of minor harmonics on resonant harmonic filters (RHF) but also to minimize the investment cost or to maximize the efficiency of RHF.
Perez Alvarez, Juan J. +5 more
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Power Quality Services Provided by Virtually Synchronous FACTS
Energies, 2019 The variable and unpredictable behavior of renewable energies impacts the performance of power systems negatively, threatening their stability and hindering their efficient operation.
Andres Tarraso +3 more
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Harmonicity of the inverse of a harmonic diffeomorphism
Journal of Mathematical Analysis and Applications, 2012 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chen, Xingdi, Fang, Ainong
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Journal of Combinatorial Theory, Series A, 1985 If P is a finite poset with maximal elements \(X_ N\), then for certain posets it is possible to decompose \(L^ 2(X_ N)=\oplus^{N}_{n=0}Harm(n)| X_ N\), where \(L^ 2(X_ N)\) is the set of complex valued functions defined on \(X_ N\) acted on by the automorphism group G of P via the permutation representation induced from the stabilizer H of a fixed ...
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Harmonic and relative harmonic dimensions
Annales Academiae Scientiarum Fennicae. Series A. I. Mathematica, 1985 On an open Riemann surface R of Heins type (i.e. R is parabolic with a single ideal boundary component, \(\delta\) R), this paper considers the relationship between the harmonic dimension of the ideal boundary, dim \(\delta\) R, and the relative harmonic dimension of the ideal boundary, \(\dim_ F\delta R\).
Nakai, Mitsuru, Sario, Leo
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Comparisons of the execution times and memory requirements for high-speed discrete fourier transforms and fast fourier transforms, for the measurement of AC power harmonics [PDF]
, 2011 Conventional wisdom dictates that a Fast Fourier Transform (FFT) will be a more computationally effective method for measuring multiple harmonics than a Discrete Fourier Transform (DFT) approach.
Burt, G. M., Roscoe, A. J.
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2004 IEEE Electro/Information Technology Conference, 2004 This paper describes a method of calculating the transforms, currently obtained via Fourier and reverse Fourier transforms. The method allows calculating efficiently the transforms of a signal having an arbitrary dimension of the digital representation by reducing the transform to a vector-to-circulant matrix multiplying.
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Asymmetrical Three-Level Inverter SiC-Based Topology for High Performance Shunt Active Power Filter
Energies, 2019 Power quality conditioner systems, such as shunt active power filters (SAPFs), are typically required to have low power losses, high-power density, and to produce no electromagnetic interference to other devices connected to the grid.
Rodrigo Guzman Iturra, Peter Thiemann
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