Results 71 to 80 of about 82,977 (264)
Polarizable Vanadium Dipoles Promote Water Dissociation on Vanadium‐Based Metal Organic Framework
Advanced Functional Materials, EarlyView.The polarization of unpaired V 3d electrons weakens the H─O bond to improve water dissociation by the dual Vδ+:O─H and Pλ−:H─O coupling hydrogen bonds formation and relaxation. P@V‐MOF electrocatalyst shows low overpotentials (94 mV in acid, 178 mV in neutral, and 77 mV in alkaline solutions) with excellent stability for effective overall water ...
Xinjuan Liu +13 more
wiley +1 more source
Advanced Functional Materials, EarlyView.We propose a suture‐complementary approach that integrates optical skin clearing with a strain‐programmable luminescent adhesive patch. Hyaluronic acid promotes transdermal delivery of tartrazine to improve optical clearing and stabilizes its interaction with a photosensitizer. Optical clearing increases the penetration depth of visible light into skin,
Seong‐Jong Kim +6 more
wiley +1 more source
Study on propagation properties of UWB signal waveform
Tongxin xuebao, 2005 Investigating the propagation properties of Ultra-wideband （UWB） were the essential topics in UWB channel theory.Based on Fourier transformation,Various UWB pulse waveform with indoor reflection,refraction and diffraction is studied.Moreover,a novel ...
LIU Yuan-jian, ZHANG Ye-rong
doaj +2 more sources
On Positivity of Fourier Transforms [PDF]
Bulletin of the Australian Mathematical Society, 2006 This note concerns Fourier transforms on the real positive line. In particular, we seek conditions on a real function u(x) in x > 0, that ensure that its Fourier-cosine transform v(t) = u(x) cos xt dx is positive. We prove first that this is so for all t > 0, if u"(x) > 0 for all x > 0, that is, that everywhere-convex functions have ...
openaire +2 more sources
A Denoising and Fourier Transformation-Based Spectrograms in ECG Classification Using Convolutional Neural Network. [PDF]
Sensors (Basel), 2022 Safdar MF, Nowak RM, Pałka P.
europepmc +1 more source
Advanced Functional Materials, EarlyView.P4bm framework in NaNbO3‐Ba(Ti, Hf)O3 ferrodistortive relaxor entails short‐range and highly‐polar ferrodistortive orders. The abundant highly‐polar orders facilitate to increase entropy change, and robust octahedral oxygen tilt enables to impede thermal perturbations.
Feng Li +11 more
wiley +1 more source
Semi-Supervised Change Detection With Fourier-Based Frequency Transformation
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingSemisupervised change detection (CD) methods have garnered increasing attention due to their capacity to alleviate the dependency of fully-supervised methods on a large number of pixel-level labels.
Ze Zhang +3 more
doaj +1 more source
Countermeasure for Interrupted-sampling Repeater Jamming based on Fractional Fourier Transformation
MATEC Web of Conferences, 2018 Today, the interrupted-sampling repeater jamming (ISRJ) has posed a serious threat to LFM radars. In this paper, a countermeasure to suppressing ISRJ based on fractional Fourier transformation (FrFT) is presented.
Liu Ming, Tao Shu, Chen Qingrong
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A new gene tree algorithm employing DNA sequences of bovine genome using discrete Fourier transformation. [PDF]
PLoS One, 2023 Abadeh R +3 more
europepmc +1 more source
Advanced Functional Materials, EarlyView.Here, we provide the reader with the current state of the art in the fabrication of high‐T2‐coherence diamond, optimized through the use of double electron–electron resonance (DEER) spectroscopy. We reveal the main as well as yet unidentified spin defects, the reduction of which is essential for reducing the spin bath and fabricating materials for ...
Olga Rubinas +6 more
wiley +1 more source