Results 41 to 50 of about 447,017 (293)

Future work on harmonics : some expert opinions part I : wind and solar power [PDF]

, 2014
A workshop on power system harmonics was organized in Stockholm in January 2014. On the agenda was among others a discussion on what are the main issues on harmonics at the moment and in the near future.
Amaris, Hortensia, Blanco, Ana Maria, Bollen, Math, Desmet, Jan, Gil de Castro, Aurora, Klatt, Matthias, Kocewiak, Lukasz, Meyer, Jan, Rönnberg, Sarah, Yang, Kai   +9 more
core   +1 more source

Comparison of Allowable Harmonic Emission Value Distribution Methods at the Point of Common Coupling of High Voltage System

Zhongguo dianli
With a large number of nonlinear loads connected to the power grid, the harmonic problems caused by them are becoming more and more serious. Various countries or organizations have formulated harmonic standards to constrain the harmonic emission values ...
Shun TAO, Huilin CHEN, Yonghai XU, Shengjun ZHOU, Xiangning XIAO   +4 more
doaj   +1 more source

Calculation of harmonic losses and ampacity in low-voltage power cables when used for feeding large LED lighting loads

Advanced Electromagnetics, 2014
A numerical investigation on the harmonic disturbances in low-voltage cables feeding large LED loads is reported. A frequency domain analysis on several commercially-available LEDs was performed to investigate the signature of the harmonic current ...
N. J. Milardovich, L. Prevosto, M. A. Lara   +2 more
doaj   +1 more source

System harmonic impedance calculation based on partial least squares equivalent weight regression

Zhejiang dianli
To mitigate the impact of singular values in voltage and current signals on regression results and achieve a more accurate delineation of harmonic responsibilities for both the system and users， this paper proposes a method for calculating system ...
QIAN Yongliang, TANG Mingshu, CHEN Bo, GUO Cheng, FENG Yue   +4 more
doaj   +1 more source

Large Scale Fluctuations in the X-Ray Background [PDF]

, 1998
We present an attempt to measure the large angular scale fluctuations in the X-Ray Background (XRB) from the HEAO1-A2 data, expressed in terms of spherical harmonics.
Barcons X., Baugh C. M., Baugh C. M., Carrera F., Comastri A., Georgantopoulos I., Hasinger G., Jahoda K., Lahav O., McHardy I., Scharf C. A., Serlemitsos P. J., Trumper J.   +12 more
core   +4 more sources

An Anisotropic Density Turbulence Model from the Sun to 1 au Derived from Radio Observations

The Astrophysical Journal, 2023
Solar radio bursts are strongly affected by radio-wave scattering on density inhomogeneities, changing their observed time characteristics, sizes, and positions.
Eduard P. Kontar, A. Gordon Emslie, Daniel L. Clarkson, Xingyao Chen, Nicolina Chrysaphi, Francesco Azzollini, Natasha L. S. Jeffrey, Mykola Gordovskyy   +7 more
doaj   +1 more source

Analysis of variability in the burst oscillations of the accreting millisecond pulsar XTE J1814-338 [PDF]

, 2005
The accreting millisecond pulsar XTE J1814-338 exhibits oscillations at the known spin frequency during Type I X-ray bursts. The properties of the burst oscillations reflect the nature of the thermal asymmetry on the stellar surface.
Markwardt, Craig B., Strohmayer, Tod E., Watts, Anna L.   +2 more
core   +3 more sources

Aggressive prostate cancer is associated with pericyte dysfunction

Molecular Oncology, EarlyView.
Tumor‐produced TGF‐β drives pericyte dysfunction in prostate cancer. This dysfunction is characterized by downregulation of some canonical pericyte markers (i.e., DES, CSPG4, and ACTA2) while maintaining the expression of others (i.e., PDGFRB, NOTCH3, and RGS5).
Anabel Martinez‐Romero, Ane Martinez‐Larrinaga, Joaquim Grego‐Bessa, Saioa Garcia‐Longarte, Hielke van Splunder, Ianire Astobiza, Amaia Ercilla, Laura Bozal‐Basterra, Isabel Mendizabal, Pilar Villacampa, Arkaitz Carracedo, Mariona Graupera   +11 more
wiley   +1 more source

Lidar detection of metallic species at the mesopause level [PDF]

, 1986
The measurement alkali species present in the atomic form at the mesopause level has been performed by lidar for more than ten years. Atomic and ionic calcium density profiles are obtained for 3 years by the same technique in the visible range, at 423 nm
Granier, C., Jegou, J. P., Megie, G.
core   +1 more source

Optimal control theory of harmonic generation

, 2012
Coherent control of harmonic generation was studied theoretically. A specific harmonic order was targeted. An optimal control theory was employed to find the driving field where restrictions were imposed on the frequency band.
Kosloff, Ronnie, Schaefer, Ido
core   +1 more source