Results 161 to 170 of about 2,667,749 (348)

High‐Index, Low‐Loss Optical Material Platforms for Ultra‐Broadband Ultraviolet‐to‐Visible Achromatic Metalenses

open access: yesAdvanced Functional Materials, EarlyView.
An integrated material platform combining engineered SiNx thin films and printable ZrO2 nanoparticle‐embedded resin enables broadband achromatic metalenses from the ultraviolet to visible range. The demonstrated meta‐optics achieve near‐diffraction‐limited focusing with minimal chromatic aberration.
Hyunjung Kang   +3 more
wiley   +1 more source

3.2 - Some Fourier Transforms in One Dimension

open access: yes, 2016
Examples of Fourier transforms (that are relevant to X-ray scattering): Fourier transforms of box function, Gaussian, sum of Gaussians. General features of Fourier transforms.
Heiney, Paul A.
core  

Fourier transforms in Clifford analysis

open access: yes, 2015
This chapter gives an overview of the theory of hypercomplex Fourier transforms, which are generalized Fourier transforms in the context of Clifford analysis. The emphasis lies on three different approaches that are currently receiving a lot of attention:
De Bie, HendrikTW060020000664408010020445350000-0003-3806-7836F7EBB716-F0ED-11E1-A9DE-61C894A0A6B4   +2 more
core   +1 more source

Dual‐Salt Carbothermal Shock Strategy Enabling Ultrafast and Sustainable Regeneration of Spent LiFePO4 Cathode Materials

open access: yesAdvanced Functional Materials, EarlyView.
Lithium iron phosphate (LFP) accounts for over 50% of the global cathode market, underscoring the need for efficient recycling and regeneration. We propose a dual‐salt carbothermal shock (CTS) strategy using LiI and NaI to in situ repair Li vacancies.
Yanjuan Li   +7 more
wiley   +1 more source

On Fourier Transforms. III [PDF]

open access: yesTransactions of the American Mathematical Society, 1935
openaire   +3 more sources

Comparison of Orthogonal Transforms for OFDM Communication System

open access: yes
Classical orthogonal frequency division (OFDM) employs fast Fourier transform (FFT) for elimination of inter-symbol interference (ISI) and expansion of time support of the transmitted signals.
Āboltiņš, Artūrs
core  

Programs for high-speed Fourier, Mellin and Fourier-Bessel transforms

open access: yes, 1979
Several FORTRAN program modules for performing one-dimensional and two-dimensional discrete Fourier transforms, Mellin, and Fourier-Bessel transforms are described along with programs that realize the algebra of high speed Fourier transforms on a ...
Ikhabisimov, D. K.   +3 more
core  

Nonuniform fast Fourier transforms using min-max interpolation

open access: yesIEEE Transactions on Signal Processing, 2003
J. Fessler, B. Sutton
semanticscholar   +1 more source

Binder Engineering Suppresses Jahn–Teller‐Driven Mn Dissolution and Enables High‐Loading MnO2 Cathodes for Aqueous Zn‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A Zn2+‐coordinated poly(vinylidene fluoride) binder is shown to suppress Jahn–Teller‐driven Mn dissolution while improving dispersion, wettability, and structural integrity in thick MnO2 cathodes. This simple binder‐engineering strategy enables high‐loading aqueous Zn‐ion batteries with enhanced areal capacity, cycling stability, and practical promise ...
Insung Jang, Geun Yoo, Geon−Hyoung An
wiley   +1 more source

The Ni,Cd Heteroatoms‐Initiated Synergistic Tuning of Electron Configuration in Fe2VO4 Nanosheets Electrocatalysts to Profoundly Stabilize Alkaline Seawater Electrolysis

open access: yesAdvanced Functional Materials, EarlyView.
A Ni,Cd‐codoped Fe2VO4/NF bifunctional electrocatalyst is rationally designed for efficient seawater electrolysis. Synergistic effect modulates electron configuration, optimizes intermediates adsorption, stabilizes high‐valence Fe/V sites, and repels chloride ions to suppress corrosion and side reactions, thus contributing to performance improvement of
Weiguo Huang   +15 more
wiley   +1 more source

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