Results 1 to 10 of about 14,434,014 (273)

Transient stability enhancement control through VSC-HVDC system and fast frequency response resources

open access: yesFrontiers in Energy Research, 2023
In addition to the traditional long-distance and bulk power transmission application, the HVDC system can bring additional benefits to the system by providing ancillary service.
Qingshen Xu   +3 more
doaj   +1 more source

UK Frequency Response Service Markets and Their Implications for China’s Frequency Regulation Market Construction

open access: yesZhongguo dianli, 2023
The high proportion of renewable energy increases the demand for high-performance frequency response services, which brings challenges to the construction of electricity markets.
Wensheng YE, Zhaoxia JING, Zongheng XUAN
doaj   +1 more source

A novel damage index extracted from frequency response of cracked Timoshenko beam subjected to moving harmonic load

open access: yesVietnam Journal of Mechanics, 2022
In this paper, there is proposed a novel damage index extracted from frequency response of cracked Timoshenko beam under moving harmonic load using the so-called Modal Assurance Criterion (MAC) concept.
Nguyen Tien Khiem, Phi Thi Hang
doaj   +1 more source

COMPARISON OF BEAMFORMING ALGORITHMS FOR MICROPHONE ARRAYS IN MATLAB [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2020
Subject of Research. The paper considers the main quantitative characteristics of microphone arrays in their performance analysis and beamforming algorithms applied for their study. Methods.
Anton A. Glukhov
doaj   +1 more source

Frequency control scheme of an AC Islanded microgrid based on modified new self-organizing hierarchical PSO with jumping time-varying acceleration coefficients

open access: yesCogent Engineering, 2023
Low energy inertia, a high penetration level of renewable energy sources, and a large ratio of power deviations in a small power transmission system have put microgrid frequency at risk of instability.
Rezvan Mansoori Seresht   +5 more
doaj   +1 more source

Modeling and analysis of nonlinear Oscillations of atomic force microscopy in liquid environment [PDF]

open access: yesمجله مدل سازی در مهندسی, 2017
Atomic force microscopy is a powerful tool in imaging and detection of nanoscale materials. The performance of this device in liquid environment has a great advantage such as ability of imaging biological samples, reducing the van der Waals forces and ...
Mohammad Mahdi jalili   +1 more
doaj   +1 more source

Diffraction Effects of IEC63034 Standard Micro-Baffle on the Frequency Response Measurements of Microspeakers

open access: yesApplied Sciences, 2022
This study investigates the diffraction effects of the IEC 63034 standard micro–baffle (SMB) on the frequency response (FR) measurements of microspeakers based on the extended Biot–Tolstoy–Medwin technique.
Jie Huang   +3 more
doaj   +1 more source

EVALUATION OF SEISMIC IMPACTS OF STRONG EARTHQUAKES IN VARIOUS PERMAFROST AND SEISMIC ZONES OF THE MONGOLIAN-SIBERIAN REGION

open access: yesГеодинамика и тектонофизика, 2022
Based on the study of the features of seismicity within the limits of continuous permafrost and in transitional climatic zones, the influence of natural and climatic factors on the magnitude of seismic impacts is revealed.
V. I. Dzhurik   +3 more
doaj   +1 more source

An Approach to Design Broadband Air Backed Piezoelectric Sensor

open access: yesArchives of Acoustics, 2015
In this work, an approach to the design of broadband thickness-mode piezoelectric transducer is presented. In this approach, simulation of discrete time model of the impulse response of matched and backed piezoelectric transducer is used to design high ...
Mohamed Galal Sayed ALI   +2 more
doaj   +1 more source

Optical and Electrical Characterizations of Uncooled Bolometers Based on LSMO Thin Films

open access: yesProceedings, 2017
In this paper the optical and electrical characterization of a 75 × 75 µm2 uncooled bolometers based on free-standing La0.7Sr0.3MnO3 /CaTiO3 (LSMO/CTO) thin films fabricated by micromachining of the silicon substrates is presented.
Vanuza M. Nascimento   +5 more
doaj   +1 more source

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