Results 91 to 100 of about 22,474,821 (353)

High-frequency Resonance Analysis and Impedance Reshaping Control of MMC-HVDC System Based on Frequency Coupling Impedance Model

Journal of Modern Power Systems and Clean Energy
In recent years, high-frequency resonance (HFR) events occurred in several modular multilevel converter based high-voltage direct current (MMC-HVDC) projects. The time delay of an MMC-HVDC system is the critical factor that induces HFR.
Juanjuan Wang, Wei Chen, Yuekun Liu, Chuang Fu, Yunming Ye, Junjie Feng   +5 more
doaj   +1 more source

Impedance Modelling and Parametric Sensitivity of a VSC-HVDC System: New Insights on Resonances and Interactions

Energies, 2018
Pervasiveness of power converters in the electric power system is expected in the future. Such large penetration will change the current power system dynamics leading to uncertain, unexpected, and potentially critical responses.
Adedotun J. Agbemuko, José Luis Domínguez-García, Eduardo Prieto-Araujo, Oriol Gomis-Bellmunt   +3 more
doaj   +1 more source

Impedance and Instability Studies in LEIR with Xenon [PDF]

, 2018
In 2017, the LEIR accelerator has been operated with Xe39+ beam for fixed target experiments in the SPS North Area. The different ion species, with respect to the standard Pb54+, allowed for additional comparative measurements of tune shift versus ...
Elias Métral, Hannes Bartosik, Marek Gąsior, Mauro Migliorati, Nicolo Biancacci, Simon Hirlaender, Thomas Levens, Verena Kain   +7 more
core   +1 more source

The role of histone modifications in transcription regulation upon DNA damage

FEBS Letters, EarlyView.
This review discusses the critical role of histone modifications in regulating gene expression during the DNA damage response (DDR). By modulating chromatin structure and recruiting repair factors, these post‐translational modifications fine‐tune transcriptional programmes to maintain genomic stability.
Angelina Job Kolady, Siyao Wang
wiley   +1 more source

Impedance Modeling and Stability Analysis for Cascade System of Three-Phase PWM Rectifier and LLC Resonant Converter

Energies, 2018
In this paper; the impedance model of PWM rectifier and LLC resonant converter are deduced, and the stability analysis of cascade system is studied. The principle of three-phase PWM rectifier is introduced; and the small signal model in d-q coordinate ...
Rutian Wang, Yuyang Wu, Guoqing He, Ying Lv, Jiaxing Du, Yanhao Li   +5 more
doaj   +1 more source

Generalized MIMO Sequence Impedance Modeling and Stability Analysis of MMC-HVDC With Wind Farm Considering Frequency Couplings

IEEE Access, 2020
Recently, small-signal stability of the modular multilevel converter (MMC) based high-voltage direct current (HVDC) transmission for wind farm integration has attracted great attentions.
Haoxiang Zong, Chen Zhang, Jing Lyu, Xu Cai, Marta Molinas, Fangquan Rao   +5 more
doaj   +1 more source

Function‐driven design of a surrogate interleukin‐2 receptor ligand

FEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang, Zelin Cheng, Teng Li, Fulian Wang, Liangminghui Zhang, Xiuxiu He, Lili Liu, Wei Wang, Aibin Liang, Guang Yang   +9 more
wiley   +1 more source

An optimisation approach to the location and sizing of multiple leaks in a duct [PDF]

, 2006
A single leak in a duct can be located, and its size predicted, by measuring the input impedance of the duct and then solving an inverse problem. However, extending this procedure to a duct containing several leaks is non-trivial, with the resulting ...
Chilekwa, V., Sharp, D.
core  

Surface-impedance approach solves problems with the thermal Casimir force between real metals

, 2003
The surface impedance approach to the description of the thermal Casimir effect in the case of real metals is elaborated starting from the free energy of oscillators.
A. Lambrecht, A. Roy, A. Roy, B. Geyer, B. Geyer, B. Geyer, B.E. Sernelius, B.E. Sernelius, B.W. Harris, C. Genet, C. Genet, E. Buks, E. Fischbach, E.I. Kats, F. Chen, F. Chen, F. Chen, F. Zhou, G. Bressi, G. L. Klimchitskaya, G.L. Klimchitskaya, G.L. Klimchitskaya, G.L. Klimchitskaya, G.L. Klimchitskaya, H.B. Chan, H.B. Chan, H.B.G. Casimir, H.B.G. Casimir, I. Brevik, I.E. Dzyaloshinskii, I.M. Kaganova, J. Heinrichs, J. Heinrichs, J. Heinrichs, J. Schwinger, M. Bordag, M. Bordag, M. Bordag, M. Bordag, M. Bordag, M. Bordag, M. Boström, M. Boström, M. Kardar, S.K. Lamoreaux, S.K. Lamoreaux, T. Ederth, U. Mohideen, V. M. Mostepanenko, V.B. Bezerra, V.B. Bezerra, V.B. Bezerra, V.B. Svetovoy, V.B. Svetovoy, V.B. Svetovoy, V.B. Svetovoy, V.M. Mostepanenko, V.M. Mostepanenko, Yu.S. Barash, Yu.S. Barash   +59 more
core   +1 more source

Mechanisms of parasite‐mediated disruption of brain vessels

FEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira, Sílvia Arroz‐Madeira, Cláudio A. Franco, Sara Silva Pereira   +3 more
wiley   +1 more source