Results 71 to 80 of about 250,706 (309)
Advanced Functional Materials, EarlyView.Ru‐substituted hexagonal perovskite SrMnO3, featuring face‐shared oxygen species, is designed as an effective heterogeneous catalyst for the aerobic oxidation of sulfides. The catalyst demonstrates high selectivity to sulfones (>99%) under mild reaction conditions (≥30 °C). Ru substitution promotes oxygen vacancy formation of face‐shared oxygen species
Keiju Wachi +5 more
wiley +1 more source
Discrete fractional Fourier transform: Vandermonde approach [PDF]
arXiv, 2016 Based on the definition of the Fourier transform in terms of the number operator of the quantum harmonic oscillator and in the corresponding definition of the fractional Fourier transform, we have obtained the discrete fractional Fourier transform from the discrete Fourier transform in a completely analogous manner. To achieve this, we have used a very
arxiv
Sono‐Piezo‐Photosynthesis of Ethylene and Acetylene from Bioethanol under Ambient Conditions
Advanced Functional Materials, EarlyView.A novel sono‐piezo‐photocatalytic strategy enables the conversion of bioethanol to ethylene (C2H4) and acetylene (C2H2) under ambient conditions, addressing the limitations of conventional methods that are high‐temperature and energy‐intensive. By using an advanced graphene oxide/sodium bismuth titanate heterostructure catalyst, this work achieved ...
Yue Jiang +21 more
wiley +1 more source
Joint estimation of doppler frequency and DOA-DOD based on FRFT in bistatic MIMO radar system
Tongxin xuebao, 2012 A novel method for the joint parameters estimate in the bistatic multiple-input multiple-output (MIMO) radar system was proposed.Firstly,a novel signal model to accurately estimate parameters of the et was proposed.Two Doppler parameters,initial Doppler ...
Li LI, Tian-shuang QIU
doaj +2 more sources
Smart noise jamming suppression method based on fast fractional filtering
The Journal of Engineering, 2019 Smart noise jamming based on digital radio frequency memory (DRFM) has both oppressive jamming effect and deceptive jamming effect, and it is difficult to be effectively suppressed by traditional anti-jamming methods.
Bowen Han +3 more
doaj +1 more source
Improved discrete fractional Fourier transform [PDF]
Optics Letters, 1997 The fractional Fourier transform is a useful mathematical operation that generalizes the well-known continuous Fourier transform. Several discrete fractional Fourier transforms (DFRFT's) have been developed, but their results do not match those of the continuous case. We propose a new DFRFT.
Soo-Chang Pei, Min-Hung Yeh
openaire +3 more sources
Advanced Functional Materials, EarlyView.This study introduces a rapid, microwave‐assisted synthetic method for halide argyrodite solid‐state electrolytes Li6PS5X${\rm Li}_6 {\rm PS}_5X$ (X=$X =$ Cl−${\rm Cl}^-$, Br−${\rm Br}^-$, I−${\rm I}^-$). Microwave synthesis increases S2−${\rm S}^{2-}$/X−$X^-$ site disorder and rotational disorder of the isolated PS43−${{\mathrm{PS}}_{4}}^{3 ...
Austin M. Shotwell +4 more
wiley +1 more source
Fractional Fourier transform of coherent optical systems application
Revista Técnica de la Facultad de Ingeniería, 2012 In 1980 Namias presented the Fourier transform of Fractional order as a generalization of the well known Fourier transform, establishing the mathematic character of this with its set of theorems and properties. Initially he used it to solve problems with
Carlos Jiménez Ruiz +2 more
doaj
A New Viewpoint to the Discrete Approximation: Discrete Yang-Fourier Transforms of Discrete-time Fractal Signal [PDF]
arXiv, 2011 It is suggest that a new fractal model for the Yang-Fourier transforms of discrete approximation based on local fractional calculus and the Discrete Yang-Fourier transforms are investigated in detail.
arxiv
Holomorphic fractional Fourier transforms
, 2019 The Fractional Fourier Transform (FrFT) has widespread applications in areas like signal analysis, Fourier optics, diffraction theory, etc. The Holomorphic Fractional Fourier Transform (HFrFT) proposed in the present paper may be used in the same wide range of applications with improved properties.
Kirwin, William D. +3 more
openaire +2 more sources