Results 151 to 160 of about 22,685,320 (370)

Fourier analysis using the number of COVID-19 daily deaths in the US. [PDF]

Epidemiol Infect, 2021
Takefuji Y.
europepmc   +1 more source

Obtaining the Fourier spectrum via Fourier coefficients [PDF]

arXiv
The Fourier spectrum is a family of dimensions that interpolates between the Fourier and Hausdorff dimensions and are defined in terms of certain energies which capture Fourier decay. In this paper we obtain a convenient discrete representation of those energies using the Fourier coefficients.
arxiv  

Note on Fourier analysis (XXVI): Some negative examples in the theory of Fourier series [PDF]

, 1950
Shin‐Ichi Izumi
openalex   +1 more source

Surface Reconstruction Induced by Preconditioning in Different Electrolytes Impacts Electrooxidation of Solketal on Multi‐Metal‐Based Catalysts

Advanced Functional Materials, EarlyView.
The electrocatalytic activity and stability of CoNiFeCu (1:1:1:0.5) toward glycerol and solketal electrooxidation are strongly impacted by the electrolyte composition used during the catalyst activation. Solketal tends to inhibit oxyhydroxide formation and suppresses Cu leaching, leading to increased activity while also supporting increased production ...
Jian Zhang, Bhawana Kumari, Thomas Quast, Steffen Cychy, Ignacio Sanjuán, Martin Muhler, Wolfgang Schuhmann, Corina Andronescu   +7 more
wiley   +1 more source

Notes on Fourier analysis (XXVI): Lipschitz condition of partial sums of Fourier series [PDF]

, 1950
Tamotsu Tsuchikura
openalex   +1 more source

Hierarchically Engineered Triple‐Defensive Antifouling Coating with Well‐Regulated Structure for Enhanced Wastewater Treatment

Advanced Functional Materials, EarlyView.
Inspired by shark skin, which has a hydrophilic “denticle layer” and a low surface energy “mucus layer,” a triple‐defense antifouling coating is developed. This coating features a robust hydrophilic catalytic nanoparticle layer overlaid with dispersed hydrophobic perfluoro‐silane domains, optimizing fouling resistance, release, and degradation for ...
Wenshuai Yang, Dan Yang, Ziqian Zhao, Charley Huang, Bin Yan, Yun Liu, Ling Zhang, Lu Gong, Hongbo Zeng   +8 more
wiley   +1 more source

A note on $L^p$-$L^q$ boundedness of Fourier multipliers on noncommutative spaces [PDF]

arXiv
In this work, we study Fourier multipliers on noncommutative spaces. In particluar, we show a simple proof of $L^p$-$L^q$ estimate of Fourier multipliers on general noncommutative spaces associated with semi-finite von Neumann algebras. This includes the case of Fourier multipliers on general locally compact unimodular groups.
arxiv  

A Fast Direct Solution of Poisson's Equation Using Fourier Analysis [PDF]

, 1965
R. W. Hockney
openalex   +1 more source

Non‐Enzymatic Destruction of the Extracellular Matrix for Activatable Orthotopic Tumor Treatment and Enhanced Drug Penetration

Advanced Functional Materials, EarlyView.
Supramolecular biomimetic nanoaggregates (HFCu NAs), constructed with fluorinated histidine and copper ions via metal coordination and aromatic packing, exhibit enhanced reactive oxygen species （ROS）generation at tumor sites, which results in stepwise collapse of the extracellular matrix (ECM), affording tumor microenvironment responsive “turn‐on” 19F ...
Hui Wang, Ruxin Feng, Yan Wang, Qian Ma, Di Yuan, Xi Yang, Suying Xu, Tony D. James, Leyu Wang   +8 more
wiley   +1 more source

Interfacial Contact Engineering Enables Giant‐Performance Semiconductor Nanomembrane Optoelectronic Devices

Advanced Functional Materials, EarlyView.
This work investigates modifying interfacial contacts in realizing giant‐performance semiconductor nanomembrane optoelectronics. Strategies, including surface reaction and buffer layer work‐function modulation, are explored to boost the Schottky barrier. An emerging material of YbOx is utilized for near‐ideal Ohmic contact.
Yibo Zhang, Gloria Vytas, Haozhe Wang, Sara Almenabawy, Zheng‐Hong Lu, Nazir P. Kherani   +5 more
wiley   +1 more source