Results 61 to 70 of about 12,015,384 (327)

‘Negative repeating doublets’ in an aftershock sequence [PDF]

Earth, Planets and Space, 2013
We observed some ‘negative repeating doublets’, with nearly opposite three-component waveforms, in the aftershock sequence of the 2008 Wenchuan earthquake. The ‘negative repeaters’ are identified by using the broadband seismic record (with frequency range from 1 to 10 Hz) of the Wenchuan station (WCH) with a near epicenter distance from 19.7 to 26.6 km.
Ma, X. J., Wu, Z. L.
openaire   +1 more source

On the Importance of Tracking the Negative-Sequence Phase-Angle in Three-Phase Inverters with Double Synchronous Reference Frame Current Control

International Symposium on Industrial Electronics, 2020
A voltage imbalance at the AC terminals of a three-phase inverter creates a ripple in the power signal on the DC side. In order to minimize this ripple, several techniques can be applied, in which a double Synchronous Reference Frame (SRF) current ...
Lucia Beloqui Larumbe, Zian Qin, P. Bauer   +2 more
semanticscholar   +1 more source

Gemcitabine, Docetaxel, Melphalan, Carboplatin as Part of Sequential Cycles of High‐Dose Chemotherapy With Autologous Hematopoietic Stem‐Cell Rescue for Multiply Relapsed/Refractory Pediatric Germ Cell Tumors

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Although most malignant germ cell tumors (GCTs) are highly curable with cisplatin‐based therapy, options for patients with multiply relapsed/refractory disease remain limited. For this population, we report the first pediatric use of gemcitabine, docetaxel, melphalan, and carboplatin (GemDMC) as part of sequential cycles of high‐dose ...
Maria Frost, Olayinka Okeleji, Amr Elgehiny, Douglas Harrison, Cynthia Herzog, Jeremy Connors, Demetrios Petropoulos, Priti Tewari, Dristhi Ragoonanan, Yago Nieto, Irtiza N. Sheikh   +10 more
wiley   +1 more source

Implementation of Current Harmonic Suppression for Imbalance in Six-Phase Permanent Magnet Synchronous Motor Drives

Energies
Current harmonics in six-phase permanent magnet synchronous motors (PMSMs) arise from inherent asymmetries caused by manufacturing tolerances and nonlinear characteristics in the inverter output. Additionally, magnetic saturation and slight imbalances in
Yu-Ting Lin, Jonq-Chin Hwang, Cheng-Tsung Lin   +2 more
doaj   +1 more source

The Impact of Geomagnetically Produced Negative-Sequence Harmonics on Power Transformers

IEEE Access, 2021
Geomagnetically induced currents (GICs), although small in magnitude, can inflict detrimental effects on power systems. GICs damage transformers, generate unusual harmonics, trip reactive power support equipment, cause protective relays to malfunction ...
Ahmed Abuhussein, Mohammad Ashraf Hossain Sadi   +1 more
doaj   +1 more source

All Non-Maximally-Helicity-Violating One-Loop Seven-Gluon Amplitudes in N=4 Super-Yang-Mills Theory

, 2004
We compute the non-MHV one-loop seven-gluon amplitudes in N=4 super-Yang-Mills theory, which contain three negative-helicity gluons and four positive-helicity gluons. There are four independent color-ordered amplitudes, (- - - + + + +), (- - + - + + +), (
C. Anastasiou, C. J. Zhu, D. B. Melrose, David A. Kosower, F. Cachazo, F. Cachazo, F. Cachazo, G. Georgiou, G. Georgiou, J. B. Wu, J. B. Wu, L. J. Dixon, Lance J. Dixon, N. Berkovits, N. Berkovits, R. Roiban, S. D. Badger, S. J. Gates, S. J. Parke, Vittorio Del Duca, W. T. Giele, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Bern, Z. Nagy, Zvi Bern   +28 more
core   +1 more source

Enabling Grid-Feeding Converters With a Dissonant-Resonant Controller for Negative-Sequence Voltage Elimination

IEEE transactions on power electronics, 2020
The mitigation of the adverse effects of voltage unbalance in equipment and power quality can be performed by the power electronic converters that interface distributed generators to the grid.
Manel Velasco, Pau Martí, Antonio Camacho, J. Rey, J. Miret, M. Castilla   +5 more
semanticscholar   +1 more source

MYCN Amplification in RB1‐Inactivated Retinoblastoma: Association With High‐Risk Features

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background MYCN amplification occurs in a subset of retinoblastoma cases, both with and without RB1 inactivation. It has been suggested that retinoblastomas with MYCN amplification represent a distinct entity with more aggressive clinical behavior.
Kyriaki Papaioannou, Regina Kubica, Karen Fischhuber, Jasmin Beygo, Madlen Reschke, Petra Ritter‐Sovinz, Eva Biewald, Petra Ketteler, Dietmar Lohmann, Deniz Kanber   +9 more
wiley   +1 more source

Optimal negative sequence current suppression strategy without phase‐locked loop based on the control of clustered new energy power stations

IET Generation, Transmission & Distribution, 2023
In the context of extremely uneven sources and loads in China, several large‐scale power transmission systems have been established. Affected by the small equivalent impedance of the system, the increase of negative sequence currents during open‐phase ...
Zhenxing Li, Yi Zhu, Cong Hu, Hong Tan, Hanli Weng, Zhenhua Li   +5 more
doaj   +1 more source

MMC-SST input-level control strategy considering power quality optimization

电力工程技术, 2022
The surge of negative sequence component of current affects the waveform quality of grid side current and endangers the normal operation of the system when the three-phase voltage of solid state transformer (SST) in the distribution network is unbalanced
ZHAO Wei, YUAN Zhi, WANG Weiqing, HE Shan   +3 more
doaj   +1 more source