Results 41 to 50 of about 313,545 (301)

Coupling Between Thermal Oscillations in the Surface of a Micro-Cylinder and Vortex Shedding

, 2007
his article studies the coupling between prescribed thermal oscillations in the surface of a micro-cylinder and vortex shedding. We deal with the unsteady, laminar, compressible flow regime where the aerodynamics forces have a periodic behavior.
J. L. Montanes, Velázquez, A., A. Velazquez, Linares, B., Montañés García, José Luis, B. Linares   +5 more
core   +1 more source

Coupling Impedance Modeling Analysis of Grid-Connected Inverters Under Three-Phase Voltage Unbalance

Energies
Under the condition of asymmetric system voltage, grid-connected inverters exhibit obvious sequence impedance frequency coupling characteristics, which can easily lead to resonance and the misoperation of protection and control devices.
Yang Liu, Haidong Yu, Qihang Wu, Bin Wang, Lisheng Li, Wenbin Liu   +5 more
doaj   +1 more source

Synchronization of phase oscillators with frequency-weighted coupling [PDF]

Scientific Reports, 2016
AbstractRecently, the first-order synchronization transition has been studied in systems of coupled phase oscillators. In this paper, we propose a framework to investigate the synchronization in the frequency-weighted Kuramoto model with all-to-all couplings.
Can Xu, Yuting Sun, Jian Gao, Tian Qiu, Zhigang Zheng, Shuguang Guan   +5 more
openaire   +3 more sources

Self-Mixing Signal Characteristics of Complex-Coupled Distributed-Feedback Terahertz Quantum-Cascade Lasers

Frontiers in Physics, 2021
Self-mixing interference (SMI) in terahertz quantum cascade lasers (THz QCLs) is one of the significant approaches for coherent THz imaging and sensing techniques.
Lei Ge, Ning Yang, Jian Wang, Weidong Chu, Suqing Duan, Yan Xie, Yingxin Wang, Lianhe Li, Edmund Linfield   +8 more
doaj   +1 more source

High-frequency Resonance Analysis and Impedance Reshaping Control of MMC-HVDC System Based on Frequency Coupling Impedance Model

Journal of Modern Power Systems and Clean Energy
In recent years, high-frequency resonance (HFR) events occurred in several modular multilevel converter based high-voltage direct current (MMC-HVDC) projects. The time delay of an MMC-HVDC system is the critical factor that induces HFR.
Juanjuan Wang, Wei Chen, Yuekun Liu, Chuang Fu, Yunming Ye, Junjie Feng   +5 more
doaj   +1 more source

Contra-directional coupling into slotted photonic crystals for spectrometric applications

, 2014
We propose and demonstrate the concept of a contra-directional coupler between a W1 and a slotted photonic crystal waveguide. The bandwidth and operating wavelength of such a coupler can be controlled via its geometrical parameters, and power transfer is
Krauss, T.F., Scullion, Mark G., Di Falco, A., Di Falco, Andrea, Scullion, M.G., Krauss, Thomas F.   +5 more
core   +1 more source

Localisation of defects with time and frequency measurements using pulsed arrays [PDF]

, 2014
The frequency dependent directivity of the periodic permanent magnet transducer is to used extract information about the position of any discontinuities present in a sample. Two approaches are used; narrowband excitation, and broadband pulsed generation.
Dixon, Steve, Hill, Samuel Joseph, Hill, Samuel, Dixon, Steve M.   +3 more
core   +1 more source

Misidentifications of specific forms of cross-frequency coupling: three warnings

Frontiers in Neuroscience, 2015
Cross-frequency coupling between neural oscillations has received increased attention over the last decade, as it is believed to underlie a number of cognitive operations in different brain systems.
Alexandre eHYAFIL, Alexandre eHYAFIL
doaj   +1 more source

Distinct mechanisms underlie electrical coupling resonance and its interaction with membrane potential resonance

Frontiers in Systems Biology, 2023
Neurons in oscillatory networks often exhibit membrane potential resonance, a peak impedance at a non-zero input frequency. In electrically coupled oscillatory networks, the coupling coefficient (the ratio of post- and prejunctional voltage responses ...
Xinping Li, Omar Itani, Dirk M. Bucher, Horacio G. Rotstein, Farzan Nadim   +4 more
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source