A Novel Technique for Load Frequency Control of Multi-Area Power Systems [PDF]
Energies, 2020 In this paper, an adaptive type-2 fuzzy controller is proposed to control the load frequency of a two-area power system based on descending gradient training and error back-propagation. The dynamics of the system are completely uncertain.
Ali Dokht Shakibjoo +3 more
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Self-rated health and its association with the individual’s activities of daily living: A cross-sectional study among elderly residing in an urban settlement [PDF]
Journal of Family Medicine and Primary CareContext: The phenomenon of population aging being inevitable, and the elderly being an asset to society by their skills and experience, their health and well-being is of paramount importance.
Sahoo Priyaranjan +2 more
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Operational reliability assessment considering independency between wind power ramps and frequency sensitive loads [PDF]
E3S Web of Conferences, 2021 With the increasing wind power penetration, power system frequency is more vulnerable especially when gust wind periods. Frequency control is used to restore system frequency back to the rated value.
Xiao Xiaolong +3 more
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Sensors, 2021 Recent advances in nanomaterials technology create the new possibility to fabricate high performance sensors. However, there has been limitations in terms of multivariate measurable and interoperable sensors. In this study, we fabricated an interoperable
Soo-Hong Min +4 more
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Structural Vulnerability Analysis of Electric Power Distribution Grids [PDF]
, 2015 Power grid outages cause huge economical and societal costs. Disruptions in the power distribution grid are responsible for a significant fraction of electric power unavailability to customers.
Koc, Yakup +3 more
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AC characteristics of low-ohmic foil shunts influenced by eddy currents in the mounting body [PDF]
Journal of Sensors and Sensor Systems, 2019 The requirements for precision current-sensing shunts are getting more sophisticated due to further development of fast switch-mode converters and other high-frequency applications.
M. Schönecker-Baußmann
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Frequency‐independent Sound Absorbing Metamaterials
Advanced Materials Technologies, 2023 AbstractInspired by the concept of frequency‐independent antennas in the electromagnetics, which theoretically exhibit a frequency‐independent bandwidth, this paper extends the concept to acoustics by adopting a log‐spiral and its modified shape to introduce a class of metamaterials called frequency‐independent sound‐absorbing metamaterials.
Semere B. Gebrekidan, Steffen Marburg
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A Frequency Independent Phase Shifter
Acoustics, 2023 A frequency-independent phase shift is determined such that two phase shifted versions of a signal can be summed whereby the resulting amplitude spectrum is unchanged. A phase difference between two signals is thus defined which remains constant for all frequencies within a given range.
Máté Csanád +2 more
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Single-layer phase gradient mmWave metasurface for incident angle independent focusing
Scientific Reports, 2021 Metasurfaces allow the rapid development of compact and flat electromagnetic devices owing to their capability in manipulating the wavefront of electromagnetic waves.
Wonwoo Lee +8 more
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Psychometric Properties of the COVID-19 Pandemic Fatigue Scale: Cross-sectional Online Survey Study
JMIR Public Health and Surveillance, 2022 BackgroundPandemic fatigue is defined as feelings of demotivation to follow preventive measures against COVID-19, together with decreased trust in government and frequency of information-seeking behaviors ...
Carmen Rodriguez-Blazquez +4 more
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