Results 11 to 20 of about 747,618 (290)

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

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

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

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

Contamination cannot explain the lack of large-scale power in the cosmic microwave background radiation [PDF]

open access: yes, 2008
Several anomalies appear to be present in the large-angle cosmic microwave background (CMB) anisotropy maps of WMAP. One of these is a lack of large-scale power.
A. A. Starobinsky   +2 more
core   +3 more sources

Improved Evaluation of The Wind Power Potential of a Large Offshore Wind Farm Using Four Analytical Wake Models

open access: yesInternational Journal of Renewable Energy Development, 2022
The objective of this paper is to investigate the ability of analytical wake models to estimate the wake effects between wind turbines (WTs). The interaction of multiple wakes reduces the total power output produced by a large offshore wind farm (LOFWF).
Mohammed Amine Hassoine   +3 more
doaj   +1 more source

On the weakness of disc models in bright ULXs [PDF]

open access: yes, 2006
It is sometimes suggested that phenomenological power-law plus cool disc-blackbody models represent the simplest, most robust interpretation of the X-ray spectra of bright ultraluminous X-ray sources (ULXs); this has been taken as evidence for the ...
Goncalves, Anabela C., Soria, Roberto
core   +4 more sources

Optimum Renewable Energy Investment Planning in Terms of Current Deficit: Turkey Model

open access: yesEnergies, 2020
In this study, a methodology was suggested for wind and solar energy investment plans through linear optimization model for the countries with an energy-based current deficit problem.
Sinem Yapar Saçık   +3 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

A Novel Probabilistic Approach to Optimize Stand-Alone Hybrid Wind-Photovoltaic Renewable Energy System

open access: yesEnergies, 2020
In the present study, a novel probabilistic approach is proposed to optimize a stand-alone hybrid wind-photovoltaic renewable energy system installed in the South China Sea.
Wei Li   +4 more
doaj   +1 more source

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