Results 11 to 20 of about 43,359 (276)

Broadband amplitude-stabilized oscillator [PDF]

open access: yesThe Eighth International Conference on Advanced Semiconductor Devices and Microsystems, 2010
In many applications we need oscillators tunable over a considerable frequency range by simple LC circuits with broadly varying dynamic resistances (quality factor Q of the reactances), while insisting on keeping a rather constant amplitude of the A.C.
Julius Foit, Jan Novak
openaire   +1 more source

Output Characterization of 220 nm Broadband 1250 nm Wavelength-Swept Laser for Dynamic Optical Fiber Sensors

open access: yesSensors, 2022
Broadband wavelength-swept lasers (WSLs) are widely used as light sources in biophotonics and optical fiber sensors. Herein, we present a polygonal mirror scanning wavelength filter (PMSWF)-based broadband WSL using two semiconductor optical amplifiers ...
Gi Hyen Lee   +7 more
doaj   +1 more source

Large-Scale Renewable Energy Transmission by HVDC: Challenges and Proposals

open access: yesEngineering, 2022
Renewable energy transmission by high-voltage direct current (HVDC) has attracted increasing attention for the development and utilization of large-scale renewable energy under the Carbon Peak and Carbon Neutrality Strategy in China.
Weisheng Wang, Guanghui Li, Jianbo Guo
doaj   +1 more source

Discriminating legitimate oscillations from broadband transients [PDF]

open access: yesBMC Neuroscience, 2013
Neural oscillations are one of the most prominent characteristics of brain activity. Unfortunately, quantification of oscillations is not always straightforward. For spiking activity the pulsed nature of the binary signal makes spectral methods difficult to apply [1].
Moca, Vasile V, Mureşan, Raul C
openaire   +1 more source

Optical Parametric Oscillation with Ultra-Low Power Threshold in a Dimer of Active-Passive Cavities

open access: yesCrystals, 2021
Optical parametric oscillation can convert the input laser into a couple of coherent optical output with signal and idler frequencies. It is an important method for the realization of the broadband middle infrared tunable lasers.
Bo Lu   +3 more
doaj   +1 more source

Oscillation characteristics and trajectory stability region analysis method of hierarchical control microgrids

open access: yesEnergy Reports, 2023
To address the broadband oscillation problem caused by isomerized power electronic devices in microgrids, an oscillation characteristic and stability region analysis method was proposed for hierarchical control structure microgrids based on the dynamic ...
Wei Chen   +4 more
doaj   +1 more source

The role of ultrasound-driven microbubble dynamics in drug delivery : from microbubble fundamentals to clinical translation [PDF]

open access: yes, 2019
In the last couple of decades, ultrasound-driven microbubbles have proven excellent candidates for local drug delivery applications. Besides being useful drug carriers, microbubbles have demonstrated the ability to enhance cell and tissue permeability ...
De Smedt, Stefaan   +6 more
core   +9 more sources

Tunable Broadband Transparency of Macroscopic Quantum Superconducting Metamaterials [PDF]

open access: yes, 2015
Narrow-band invisibility in an otherwise opaque medium has been achieved by electromagnetically induced transparency (EIT) in atomic systems. The quantum EIT behaviour can be classically mimicked by specially engineered metamaterials via carefully ...
Anlage, Steven. M.   +3 more
core   +3 more sources

Initial Helioseismic Observations by Hinode/SOT [PDF]

open access: yes, 2007
Results from initial helioseismic observations by Solar Optical Telescope onboard Hinode are reported. It has been demonstrated that intensity oscillation data from Broadband Filter Imager can be used for various helioseismic analyses.
Berger, Thomas E.   +14 more
core   +1 more source

Medium-High Frequency Impedance Modeling of MMC and System Stability Analysis Considering Voltage Measurement Characteristics

open access: yesZhongguo dianli, 2022
In MMC impedance modelling, the existing research does not take into account the influence of the capacitive voltage transformer (CVT) measurement characteristics on the mid and high frequency bands of the MMC impedance, which may reduce the accuracy of ...
Qinan LI   +8 more
doaj   +1 more source

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