Results 21 to 30 of about 43,903 (287)

An adaptive under-frequency optimal control strategy for power system combined pumped storage and under-frequency load shedding.

PLoS ONE, 2021
With the construction and development of ultra-high voltage (UHV) power grids, large-scale, long-distance power transmission has become common. A failure of the connecting line between the sending-end power grid and the receiving-end power grid will ...
Wentao Huang, Jinman Yu, Zhijun Yuan, Zhongwei He, Jun He, Minghui Deng   +5 more
doaj   +2 more sources

Enhanced inflammation and suppressed adaptive immunity in COVID-19 with prolonged RNA shedding

Cell Discovery, 2022
Little is known regarding why a subset of COVID-19 patients exhibited prolonged positivity of SARS-CoV-2 infection. Here, we found that patients with long viral RNA course (LC) exhibited prolonged high-level IgG antibodies and higher regulatory T (Treg ...
Xiaohua Tang, Rui Sun, Weigang Ge, Tingting Mao, Liujia Qian, Chongquan Huang, Zhouyang Kang, Qi Xiao, Meng Luo, Qiushi Zhang, Sainan Li, Hao Chen, Wei Liu, Bingjie Wang, Shufei Li, Xiaoling Lin, Xueqin Xu, Huanzheng Li, Lianpeng Wu, Jianyi Dai, Huanhuan Gao, Lu Li, Tian Lu, Xiao Liang, Xue Cai, Guan Ruan, Fei Xu, Yan Li, Yi Zhu, Ziqing Kong, Jianping Huang, Tiannan Guo   +31 more
doaj   +1 more source

Adaptive under‐frequency load shedding scheme for power systems with high wind power penetration considering operating regions

IET Generation, Transmission & Distribution, 2022
With the ever‐increasing penetration of wind power into power systems, wind turbine generators (WTGs) are required to provide frequency regulation services to maintain the system frequency stability.
Xingyang Wu, Jianfeng Dai, Yi Tang, Feng Xue   +3 more
doaj   +1 more source

Parametric optimization of the femoropopliteal artery stent design based on numerical analysis [PDF]

, 2021
High-failure rates of Peripheral Arterial Disease (PAD) stenting were reported due to the inability of certain stent strut configuration to accommodate severe biomechanical environment of the Femoro-Popliteal Artery (FPA) such as bends, twists, and ...
Kareem, Ali Kamil
core  

Using the nonhuman primate model of HCMV to guide vaccine development. [PDF]

, 2014
The natural history of human cytomegalovirus (HCMV) is inextricably associated with mucosal surfaces. The vast preponderance of primary infections occur following mucosal exposure to infectious virions, and the high seroprevalence of HCMV throughout the ...
Barry, Peter A, Deere, Jesse D
core   +3 more sources

A Policy Switching Approach to Consolidating Load Shedding and Islanding Protection Schemes

, 2014
In recent years there have been many improvements in the reliability of critical infrastructure systems. Despite these improvements, the power systems industry has seen relatively small advances in this regard. For instance, power quality deficiencies, a
Cotilla-Sanchez, Eduardo, Fern, Alan, Meier, Rich   +2 more
core   +1 more source

Adaptive Load Shedding Analysis in Power Systems by Using Artificial Neural Network [PDF]

Journal of Intelligent Procedures in Electrical Technology, 2010
The stability of frequency and voltage is one of the basic principles in the power systems. One of the latest control measures for power system frequency control and stability is load shedding.
Rahmatolah Hooshmand, Majid Moazzami
doaj  

Development of Adaptive Artificial Neural Network Security Assessment Schema for Malaysian Power Grids

IEEE Access, 2019
The mission of the power system operator has become more complicated than before due to increasing load demand, which causes power systems to operate near their security limits.
Ahmed N. Al-Masri, Mohd Zainal Abidin Ab Kadir, Ali Saadon Al-Ogaili, Yap Hoon   +3 more
doaj   +1 more source

Adaptive Data Stream Management System Using Learning Automata

, 2011
In many modern applications, data are received as infinite, rapid, unpredictable and time- variant data elements that are known as data streams. Systems which are able to process data streams with such properties are called Data Stream Management Systems
Abdi, Fatemeh, Haghjoo, Mostafa S., Mohammadi, Shirin, Safaei, Ali A.   +3 more
core   +2 more sources

A dynamic modelling environment for the evaluation of wide area protection systems [PDF]

, 2008
This paper introduces the concept of dynamic modelling for wide area and adaptive power system protection. Although not limited to these types of protection schemes, these were chosen due to their potential role in solving a multitude of protection ...
Abdulhadi, I.F., Burt, Graeme, Mcdonald, James, Tumilty, Ryan   +3 more
core   +1 more source