Results 91 to 100 of about 288,603 (325)
Additive energies on discrete cubes
Discrete Analysis, 2023 One definition of additive combinatorics is that it is the study of subsets of (usually Abelian) groups. Two much studied parameters associated with a subset $A$ are the size of its sumset $A+A=\{a+b:a,b\in A\}$ (or the product set $A.A=\{a.b:a,b\in A\}$
Jaume de Dios Pont +3 more
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Discrete Signal Processing on Graphs: Sampling Theory
, 2015 We propose a sampling theory for signals that are supported on either directed or undirected graphs. The theory follows the same paradigm as classical sampling theory.
Chen, Siheng +3 more
core +1 more source
Trigonometric Representations of Generalized Dedekind and Hardy Sums via the Discrete Fourier Transform [PDF]
, 2015 Comment: To Professor Helmut Maier on his 60th birthday. In: Analytic Number Theory - In Honor of Helmut Maier's 60th Birthday, C. Pomerance and M. Th. Rassias (eds.), Springer, New York, 2015, pp.
Rassias, Michael Th., Tóth, László
openaire +2 more sources
Advanced Functional Materials, EarlyView.A scalable bio‐templated approach using spray‐coating and thermal annealing fabricates cellulose nanofibril (CNF) films loaded with gold nanoparticles (Au NPs) and graphene oxide (GO) hybrids as Surface‐enhanced Raman scattering (SERS) substrates. The 3D CNF network ensures uniform Au NPs distribution, while annealing induces more hotspots, confirmed ...
Yingjian Guo +14 more
wiley +1 more source
Advanced Functional Materials, EarlyView.A UV‐crosslinkable soft anisotropic conductive film (ACF) provides high‐resolution, room‐temperature electrical interfacing. Upon UV exposure, azide crosslinkers within the ACF matrix form covalent bonds with a wide range of C–H‐containing materials, resulting in interfaces that are both mechanically durable and electrically reliable.
Jun Choi +7 more
wiley +1 more source
Advanced Functional Materials, EarlyView.In this research, it is demonstrated that dual nitrogen and sulfur doping in hollow carbon spheres creates a tunable coordination environment that stabilizes cationic Pd single atoms as robust organometallic complexes, enabling high selectivity and stability for electrochemical hydrogen peroxide production under harsh acidic and peroxide‐rich ...
Guilherme V. Fortunato +16 more
wiley +1 more source
Wavelet Sets on Locally Compact Abelian Groups
پژوهشهای ریاضی, 2020 Introduction An orthonormal wavelet is a square-integrable function whose translates and dilates form an orthonormal basis for the Hilbert space . That is, given the unitary operators of translation for and dilation , we call an orthonormal wavelet if
Mehdi Rashidi-Kouchi
doaj
A Novel Method for Image Encryption Based on Chaos and Transcendental Numbers
IEEE Access, 2019 In this paper, a method for image encryption is proposed based on a novel approach using chaos and transcendental numbers for generating the substitution box and the ciphering keys. The Chaotic Pi Ciphering (CPC) is a robust symmetric cryptosystem of the
Victor Manuel Silva Garcia +4 more
doaj +1 more source
Advanced Functional Materials, EarlyView.This study demonstrates a Maya blue‐inspired hybrid solar evaporator using commercial black acrylic paint, achieving 98% solar‐thermal conversion efficiency and 2.39 kg m−2 h−1 water evaporation rate through a durable, hydrophilic organic–inorganic structure that enables scalable, cost‐effective desalination and wastewater purification.
Dao Thi Dung +5 more
wiley +1 more source
Intelligent OFDM telecommunication system. Part 2. Examples of complex and quaternion many-parameter transforms [PDF]
, 2019 In this paper, we propose unified mathematical forms of many-parametric complex and quaternion Fourier transforms for novel Intelligent OFDM-telecommunication systems (OFDM-TCS). Each many-parametric transform (MPT) depends on many free angle parameters.
Labunets, V. G., Ostheimer, E. V.
core