Results 71 to 80 of about 2,113,812 (291)
On a relation between two-dimensional Fourier integrals and series of Hankel transforms
, 1965 Procedures are developed for expressing twodimensional Fourier transforms in terms of tabulated one-dimensional ...
Cornacchio J. V.; Soni, R. P.
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From Food to Power: Hydrogel Thermoelectrics for Ingestible Electronics
Advanced Functional Materials, EarlyView.We introduce a fully edible thermoelectric–electrochromic platform that harvests heat from food and converts it into a visible color change. N‐type and p‐type hydrogel thermoelectric generators connected in series power anthocyanin‐based electrochromic displays, demonstrating the feasibility of safe, biodegradable, ingestible systems for on‐food ...
Antonia Georgopoulou +3 more
wiley +1 more source
Advanced Functional Materials, EarlyView.ABSTRACT Chitosan, a polysaccharide upcycled from biowaste, has long promised sustainable, biocompatible, and antimicrobial films and devices, an appeal reinforced by its recent regulatory recognition, with several chitosan‐based antibacterial dressings gaining clearance through the Food and Drug Administration's 510(k) pathway.
Jacopo Nicoletti +16 more
wiley +1 more source
Calculation Scheme Based on a Weighted Primitive: Application to Image Processing Transforms
EURASIP Journal on Advances in Signal Processing, 2007 This paper presents a method to improve the calculation of functions which specially demand a great amount of computing resources. The method is based on the choice of a weighted primitive which enables the calculation of function values under the scope ...
Gregorio de Miguel Casado +3 more
doaj +2 more sources
Chaotic synchronization of vibrations of a coupled mechanical system consisting of a plate and beams
Latin American Journal of Solids and StructuresIn this paper mathematical model of a mechanical system consisting of a plate and either one or two beams is derived. Obtained PDEs are reduced to ODEs, and then studied mainly using the fast Fourier and wavelet transforms.
J. Awrejcewicz +4 more
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PAPR FOR OFDM SYSTEM BASED ON FAST DISCRETE CURVELET TRANSFORM [PDF]
Journal of Engineering Science and Technology, 2018 Orthogonal Frequency-Division Multiplexing (OFDM) is an attractive transmission technique for high-bit-rate communication systems. However, high Peak to Average Power Ratio (PAPR) of transmitted signals is a major shortcoming for Multi-Carrier Modulation
MOHAMED H. M. NERMA +1 more
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Accelerating the Nonuniform Fast Fourier Transform [PDF]
SIAM Review, 2004 Summary: The nonequispaced Fourier transform arises in a variety of application areas, from medical imaging to radio astronomy to the numerical solution of partial differential equations. In a typical problem, one is given an irregular sampling of \(N\) data in the frequency domain and one is interested in reconstructing the corresponding function in ...
Leslie Greengard, June-Yub Lee
openaire +3 more sources
Fourier restriction to polynomial curves I: a geometric inequality [PDF]
, 2010 We prove a Fourier restriction result for general polynomial curves in Rd. Measuring the Fourier restriction with respect to the affine arclength measure of the curve, we obtain a universal estimate for the class of all polynomial curves of bounded ...
Wright, James +5 more
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Advanced Functional Materials, EarlyView.Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand +13 more
wiley +1 more source
Matrix-Vector Based Fast Fourier Transformations on SDR Architectures [PDF]
Advances in Radio Science, 2008 Today Discrete Fourier Transforms (DFTs) are applied in various radio standards based on OFDM (Orthogonal Frequency Division Multiplex). It is important to gain a fast computational speed for the DFT, which is usually achieved by using specialized Fast ...
Y. He +3 more
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