Results 1 to 10 of about 1,566 (69)

Evaluation of the power deficit of elderly people during stair negotiation: Which joints should be assisted at least by an exoskeleton and with what amount?

open access: yesWearable Technologies, 2022
Climbing stairs can become a daily obstacle for elderly people, and an exoskeleton can assist here. However, the exoskeletons that are designed to assist stair climbing are actuated in different ways.
Max Böhme   +4 more
doaj   +3 more sources

Russian Province in a Power Deficit (Regional Stories) [PDF]

open access: yesE3S Web of Conferences, 2020
This article discusses how a power deficit can be felt in the Russian province. The uneven economic development of the territory of Russia, large gaps between the center and the province give rise to the practice of a rapid centralization and exodus from
Vladimirovich Skiperskikh Aleksandr
doaj   +1 more source

Coordinated Load Shedding Control Scheme for Recovering Frequency in Islanded Microgrids

open access: yesIEEE Access, 2020
Supply and demand balance is required to assure the normal operation of microgrids. When unintentional islanding occurs in a microgrid, a load shedding (LS) control scheme is necessary to achieve the power balance and frequency stability of an islanded ...
Can Wang   +4 more
doaj   +1 more source

POSSIBILITIES AND LIMITATIONS OF SOLAR ENERGY AS A SUSTAINABLE AND RENEWABLE POWER SOURCE TO HELP END THE CURRENT POWER DEFICIT IN ZAMBIA

open access: yesResearch on Enterprise in Modern Economy Theory and Practice, 2022
Background and Objective: The study investigates the possibilities and limitations of solar energy as a sustainable and renewable power source to help end the current power deficit in Zambia.
Stephen Chishimba
doaj   +1 more source

Adaptive Time Delay Strategy for Reliable Load Shedding in the Direct-Current Microgrid

open access: yesIEEE Access, 2020
This paper proposes a practical and reliable decentralized load shedding strategy to protect the integrity of the direct-current (DC) microgrid. The proposed strategy utilizes time delays that automatically adapt to the DC microgrid operating conditions ...
Jafar Mohammadi, Firouz Badrkhani Ajaei
doaj   +1 more source

Decentralized Adaptive Under Frequency Load Shedding Scheme Based on Load Information

open access: yesIEEE Access, 2019
The inertia of the power system changes when the generators in the system are disturbed or tripped. However, in some systems, there is no control center or communication device falling behind.
Peican He, Buying Wen, Huaiyuan Wang
doaj   +1 more source

A Numerical Study of the Effects of Wind Direction on Turbine Wakes and Power Losses in a Large Wind Farm

open access: yesEnergies, 2013
In this study, large-eddy simulations (LESs) were performed to investigate the effects of changing wind direction on the turbine wakes and associated power losses in the Horns Rev offshore wind farm.
Fernando Porté-Agel   +2 more
doaj   +1 more source

Wide-Area Measurement System-Based Optimal Multi-Stage Under-Frequency Load-Shedding in Interconnected Smart Power Systems Using Evolutionary Computing Techniques

open access: yesApplied Sciences, 2019
Power systems that are known as the most complex systems encounter different types of disturbances and emergence events. To operate such systems in a stable mode, several control protection techniques are in need.
Hassan Haes Alhelou   +3 more
doaj   +1 more source

Functional analysis of ADHD in children using nonlinear features of EEG signals [PDF]

open access: yesJournal of Integrative Neuroscience, 2018
Attention deficit hyperactivity disorder is a neurodevelopmental condition associated with varying levels of hyperactivity, inattention, and impulsivity.
Shiva Khoshnoud, Mohammad Ali Nazari, Mousa Shamsi
doaj   +1 more source

Numerical Study on the Yaw Control for Two Wind Turbines under Different Spacings

open access: yesApplied Sciences, 2022
In this study, the large eddy simulation method and the actuator line model are used to investigate the wake redirection of two turbines. Different turbine spacings and yaw-based control of the upstream turbine are considered.
Zhiqiang Xin   +4 more
doaj   +1 more source

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