Results 11 to 20 of about 493,296 (323)
Real-time harmonic identification under varying grid conditions [PDF]
Serbian Journal of Electrical Engineering, 2021 One of the challenges of the power quality management is a need for reliable harmonic identification in grids with multiple non-linear loads. This paper proposes a novel method to accurately determine time-varying harmonic contributions of non ...
Bulycheva Evgeniia A. +1 more
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IET Smart Grid, 2022 The capacity of renewable distributed generation (DG) connected in distribution networks is increasing. Use of power electronic interfaces means DG can inject harmonic currents through the point of common coupling into upstream networks.
Wei Sun, Gareth P. Harrison
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The arithmetic-harmonic mean [PDF]
Mathematics of Computation, 1984 Consider two sequences generated by \[ a n + 1 = M ( a n , b n ) , b
Foster, D. M. E., Phillips, G. M.
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Pythagorean harmonic summability of Fourier series
Demonstratio Mathematica, 2021 This paper explores the possibility for summing Fourier series nonlinearly via the Pythagorean harmonic mean. It reports on new results for this summability with the introduction of new concepts like the smoothing operator and semi-harmonic summation ...
Haidar Nassar H. S.
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IEEE Access, 2021 Harmonic detection and control for power grids have always been major concerns for researchers. With the application of diverse semiconductor materials in power systems, numerous asymmetrical loads arise, resulting in increasingly poor performance of ...
Jianming Shi, Zhongmin Liu
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An asymptotic expansion for the fractional $p$-Laplacian and for gradient dependent nonlocal operators [PDF]
, 2021 Mean value formulas are of great importance in the theory of partial differential equations: many very useful results are drawn, for instance, from the well known equivalence between harmonic functions and mean value properties.
Bucur, Claudia, Squassina, Marco
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Improved Deadbeat Predictive Control Based Current Harmonic Suppression Strategy for IPMSM
Energies, 2022 When the interior permanent magnet synchronous motor (IPMSM) is running, there are abundant harmonics in the stator current. In order to achieve the suppression of current harmonics, the current harmonic extraction method and current harmonic controller ...
Xin Gu, Yiyang Li, Wei Chen, Xuefeng Jin
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Some sharp inequalities involving Seiffert and other means and their concise proofs [PDF]
, 2012 In the paper, by establishing the monotonicity of some functions involving the sine and cosine functions, the authors provide concise proofs of some known inequalities and find some new sharp inequalities involving the Seiffert, contra-harmonic ...
Jiang, Wei-Dong, Qi, Feng
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Sharp Bounds for Neuman Means by Harmonic, Arithmetic, and Contraharmonic Means
Abstract and Applied Analysis, 2014 We give several sharp bounds for the Neuman means NAH and NHA (NCA and NAC) in terms of harmonic mean H (contraharmonic mean C) or the geometric convex combination of arithmetic mean A and harmonic mean H (contraharmonic mean C and arithmetic mean A) and
Zhi-Jun Guo +3 more
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Mean-values and harmonic polynomials [PDF]
Transactions of the American Mathematical Society, 1943 Not ...
Beckenbach, E. F., Reade, Maxwell
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