Articles with "ultra weak" as a keyword



Ultra‐Weak Polarization‐Strain Coupling Effect Boosts Capacitive Energy Storage

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Published in 2024 at "Advanced Materials"

DOI: 10.1002/adma.202406219

Abstract: In pulse power systems, multilayer ceramic capacitors (MLCCs) encounter significant challenges due to the heightened loading electric field (E), which can lead to fatigue damage and ultrasonic concussion caused by electrostrictive strain. To address these… read more here.

Keywords: strain; energy storage; polarization; ultra weak ... See more keywords

Revisiting ultra-weak metal-metal bonding

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Published in 2019 at "Chemical Physics Letters"

DOI: 10.1016/j.cplett.2019.06.023

Abstract: Abstract Quantum mechanical calculations have been carried out to reinvestigate the possibility of formation of true triple bond between s-block metals (Be, Mg, Ca) supported by different s1 type donors (Li, Na, Cu). The existence… read more here.

Keywords: metal metal; revisiting ultra; metal; metal bonding ... See more keywords
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Spectra of ultra-weak photon emission

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Published in 2017 at "Free Radical Biology and Medicine"

DOI: 10.1016/j.freeradbiomed.2017.04.331

Abstract: Organisms undergoing oxidative metabolism or stress chemically generate electronically excited species through dioxetane and tetroxide pathways. Consequently, luminescence is emitted which could be exploited for non-invasive label-free monitoring of oxidative stress. Spectral analysis of this… read more here.

Keywords: spectra ultra; weak photon; emission spectra; ultra weak ... See more keywords

Frequency regulation optimization strategy of improved virtual synchronous generator under ultra-weak grid conditions

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Published in 2025 at "AIP Advances"

DOI: 10.1063/5.0301216

Abstract: To enhance the frequency support capability of grid-forming energy storage systems governed by Virtual Synchronous Generators (VSGs) under ultra-weak grid conditions, an improved VSG frequency support strategy is proposed based on model predictive control. Initially,… read more here.

Keywords: ultra weak; frequency regulation; grid conditions; weak grid ... See more keywords

Analytical model and precise evaluation of multi-layer magnetic shielding performances considering ultra-weak magnetic properties

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Published in 2024 at "Journal of Physics D: Applied Physics"

DOI: 10.1088/1361-6463/ad5211

Abstract: Regarding the vast difference between the design index and the actual performance of magnetic shielding devices, this paper proposes a novel method of using precise permeability under a specific weak magnetic field, aiming to improve… read more here.

Keywords: ultra weak; layer; weak magnetic; magnetic properties ... See more keywords

Fiber-end antireflection method for ultra-weak fiber Bragg grating sensing systems

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Published in 2021 at "Measurement Science and Technology"

DOI: 10.1088/1361-6501/abd797

Abstract: A novel fiber-end antireflection method for reducing the reflection noise in ultra-weak fiber Bragg grating (FBG) sensing systems is proposed in this study. The principle of fiber-end antireflection is analyzed and simulated theoretically, and then… read more here.

Keywords: sensing systems; fiber end; ultra weak; end antireflection ... See more keywords

Photon-limited imaging through scattering medium based on deep learning.

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Published in 2019 at "Optics express"

DOI: 10.1364/oe.27.033120

Abstract: Imaging under ultra-weak light conditions is affected by Poisson noise heavily. The problem becomes worse if a scattering media is present in the optical path. Speckle patterns detected under ultra-weak light condition carry very little… read more here.

Keywords: weak light; scattering media; deep learning; ultra weak ... See more keywords

Femtosecond laser written ultra-weak Fabry-Perot array for distributed absolute temperature profile sensing with high spatial resolution.

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Published in 2022 at "Optics express"

DOI: 10.1364/oe.477914

Abstract: In this paper, high spatial-resolution distributed temperature sensing has been realized based on a femtosecond laser written ultra-weak Fabry-Perot Array (FPA). 50 identical Fabry-Perot cavities are fabricated in a 10 mm long optical fiber by… read more here.

Keywords: ultra weak; spatial resolution; femtosecond laser; fabry perot ... See more keywords

Long-gauge ultra-weak FBG strain sensor insensitive to structural defects: numerical simulation and experimental verification.

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Published in 2025 at "Optics express"

DOI: 10.1364/oe.562233

Abstract: Strain monitoring of concrete structures with surface defects and material inhomogeneity is a challenge in the field of structural monitoring. In this paper, based on the characteristics of long-gauge structure and ultra-weak fiber Bragg grating… read more here.

Keywords: ultra weak; structural defects; sensor; long gauge ... See more keywords

Multiport swept-wavelength interferometer with laser phase noise mitigation employing a broadband ultra-weak FBG array.

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Published in 2020 at "Optics letters"

DOI: 10.1364/ol.402388

Abstract: Optical vector network analyzers (OVNAs) based on swept-wavelength interferometry are applied widely in optical metrology and sensing to measure the complex transfer functions of optical components, devices, and fibers. Phase noise from laser sweep nonlinearities… read more here.

Keywords: array; phase noise; ultra weak; swept wavelength ... See more keywords
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Ultra-Weak Chemiluminescence Enhanced by Cerium-Doped LaF3 Nanoparticles: A Potential Nitrite Analysis Method

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Published in 2020 at "Frontiers in Chemistry"

DOI: 10.3389/fchem.2020.00639

Abstract: In this work, cerium-doped LaF3 nanoparticles (LaF3:Ce NPs) were successfully synthesized and characterized. Its chemiluminescence (CL) property was studied, and it was amazingly found that it intensely enhanced the ultra-weak CL of the NaNO2-H2O2 system.… read more here.

Keywords: nitrite analysis; doped laf3; ultra weak; cerium doped ... See more keywords