Results 81 to 90 of about 702,260 (344)

Vulnerability assessment of high-voltage direct current transmission systems to cyberattacks

Security and Safety
High-voltage direct current (HVDC) transmission systems demonstrate significant advantages in long-distance and high-capacity power transmission. Voltage-source converter-based HVDC (VSC-HVDC), with its flexible power flow control and independent active ...
Guo Rong, Liu Mengxiang, Deng Ruilong
doaj   +1 more source

Effects of Conditional Changes on High-Voltage Direct Current Transmission Line Characteristic

Journal of Electrical and Computer Engineering, 2022
The high-voltage direct current (HVDC) transmission system, which links the Gurun Substation of the National Electric Authority of Malaysia (Tenaga Nasional Berhad, TNB) with the Khlong Ngae Station of the Electricity Generating Authority of Thailand ...
Chaichan Pothisarn, Atthapol Ngaopitakkul, Monthon Leelajindakrairerk, Natthanon Phannil, Sulee Bunjongjit, Surakit Thongsuk, Bancha Sreewirote   +6 more
doaj   +1 more source

Novel pilot protection scheme for line‐commutated converter high voltage direct current transmission lines based on behaviour of characteristic harmonic impedances

IET Generation, Transmission & Distribution, 2020
Transient behaviour of high-voltage direct current transmission lines under direct current faults can be easily affected by many factors, namely, fault location, fault resistance and transmission line length.
Farzad Dehghan Marvasti, A. Mirzaei, M. E. Hamedani Golshan   +2 more
semanticscholar   +1 more source

Heterogeneity in the Global Practice of Central Nervous System Staging in Pediatric Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Central nervous system (CNS) involvement in childhood acute lymphoblastic leukemia (ALL) is assessed by cell counting and cytomorphology from cerebrospinal fluid (CSF) and is used for treatment stratification worldwide. The ratio of “CNS2” patients in clinical trials ranges from 3% to 40%, with unclear prognostic significance ...
Laura Almási, Bernadett Borbála Huszti, Gábor Barna, Marko Kavcic, Janez Jazbec, Lennart Lenk, Vera Münch, Sophia Polychronopoulou, Ágnes Márk, Maria Thastrup, Lüder H. Meyer, Kjeld Schmiegelow, Cornelia Eckert, Christina Halsey, Dániel J. Erdélyi   +14 more
wiley   +1 more source

Piezoelectric transformer-based high conversion ratio interface for driving dielectric actuator in microrobotic applications

International Journal of Advanced Robotic Systems, 2016
Dielectric actuators are utilized to convert electrical power into mechanical strain with considerable potential in microrobotic applications. However, critical challenges that need to be addressed include high-voltage interface with high conversion ...
Chen Chen, Meng Liu, Jun Lin, Biao Wang, Yanzhang Wang   +4 more
doaj   +1 more source

Voltage and Current Measuring Technologies for High Voltage Direct Current Supergrids: A Technology Review Identifying the Options for Protection, Fault Location and Automation Applications

IEEE Access, 2020
After the occurrence of a DC-side feeder faults on HVDC transmission systems, protection and fault detection systems are anticipated to minimize their onerous effects, by initiating fault-clearing actions such as selective tripping of circuit breakers ...
D. Tzelepis, V. Psaras, E. Tsotsopoulou, S. Mirsaeidi, A. Dyśko, Q. Hong, Xinzhou Dong, S. Blair, V. Nikolaidis, Vassilis Papaspiliotopoulos, G. Fusiek, G. Burt, P. Niewczas, Campbell D. Booth   +13 more
semanticscholar   +1 more source

The Role of Hematopoietic Cell Transplantation in Ataxia‐Telangiectasia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Ataxia‐telangiectasia (A‐T) is a DNA repair disorder characterized by neurodegeneration, immunodeficiency, and cancer predisposition. Hematopoietic cell transplantation (HCT) is an established therapy in related disorders such as Fanconi anemia (FA) and Nijmegen breakage syndrome (NBS), but its role in A‐T is unclear.
Laila Alkhouli, Seth Rotz, Masatoshi Takagi, Richa Sharma   +3 more
wiley   +1 more source

Research on High Voltage Direct Current Power Supply System for Telecommunications

Dianxin kexue, 2013
The analysis was made for the nominal voltage selection and system design method which was based on energy efficiency prompt and power reliability increasing,these different goals to replace AC power system by DC power system,and these two direct current
Li Lu, Shineng Lai, Wenbo Sun, Fuping Hou   +3 more
doaj   +2 more sources

Efficacy and Safety Analysis of Roxarestat in Regulating Renal Anemia in Patients on Maintenance Hemodialysis

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Objective To compare the efficacy and safety of roxarestat versus recombinant human erythropoietin (rhEPO) in the management of renal anemia in patients undergoing maintenance hemodialysis. Methods This was a prospective, open‐label, randomized controlled trial.
Lingling Chen, Junjie Zhu, Qiaonan Ge
wiley   +1 more source

Space charge dynamics in oil and thick pressboard combined system under polarity reversal voltage [PDF]

, 2014
In this study, the space charge dynamics in an oil and oil impregnated pressboard combined insulation system are investigated by the means of pulsed electroacoustic (PEA) technique under voltage polarity reversal conditions. To be closer to the real case
Hao, Miao, Gordon Wilson, Yuan Zhou, George Chen, Wilson, Gordon, Miao Hao, Paul Jarman, Zhou, Yuan, Jarman, Paul, Chen, George   +9 more
core   +1 more source