Results 111 to 120 of about 909,498 (188)

Harnessing Outer Space for Improved Electrocaloric Cooling

Advanced Functional Materials, EarlyView.
A novel radiative heat sink/source‐integrated electrocaloric (R‐iEC) system combines the electrocaloric (EC) effect with a thermally conductive radiative cooler (TCRC) to address heat dissipation limitations in EC devices. Utilizing outer space as a heat sink, the system achieves up to 240 W m−2 of heat dissipation performance, making it highly ...
Dong Hyun Seo, Hyung Rae Kim, Joo Ho Yun, Hyunkyu Kwak, Do Hyeon Kim, Se‐Yeon Heo, Rujun Ma, Gil Ju Lee, Young Min Song   +8 more
wiley   +1 more source

An ultra-precise Fast Fourier Transform

Measurement: Sensors
The Fast Fourier Transform (FFT) is a cornerstone of digital signal processing, generating a computationally efficient estimate of the frequency content of a time series.
Manus Henry
doaj  

Fourier transform of composed functions [PDF]

arXiv
We prove an explicit formula for the Fourier transform of $f(u(t))$, given the Fourier transform of $f(t)$, assuming $f\in L^2(-\infty,\infty)$ and $u$ sufficiently well behaved. We illustrate its usefulness by calculating the Fourier transform of $(a^2 + \sinh(bt)^2)^{-1}$.
arxiv  

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

Dispersive Fourier transform based dual-comb ranging

Nature Communications
Laser-based light detection and ranging (LIDAR) offers a powerful tool to real-timely map spatial information with exceptional accuracy and owns various applications ranging from industrial manufacturing, and remote sensing, to airborne and in-vehicle ...
Bing Chang, Teng Tan, Junting Du, Xinyue He, Yupei Liang, Zihan Liu, Chun Wang, Handing Xia, Zhaohui Wu, Jindong Wang, Kenneth K. Y. Wong, Tao Zhu, Lingjiang Kong, Bowen Li, Yunjiang Rao, Baicheng Yao   +15 more
doaj   +1 more source

Synchroextracting Transform Based on the Novel Short-Time Fractional Fourier Transform

Fractal and Fractional
As a generalization of the short-time Fourier transform (STFT), the novel short-time fractional Fourier transform (NSTFRFT) has been introduced recently.
Bei Li, Zhuosheng Zhang
doaj   +1 more source

Springer correspondence via p-adic analytic methods [PDF]

arXiv, 2002
We show that the standard proof of the Springer correspondence in positive characteristic (via Deligne-Fourier transform) works verbatim in characteristic zero, up to replacing Deligne-Fourier transform by another etale Fourier transform introduced by the author in a previous work.
arxiv  

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

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

Characterization of Pseudo-Differential Operators Associated with the Coupled Fractional Fourier Transform

Axioms
The main aim of this article is to derive certain continuity and boundedness properties of the coupled fractional Fourier transform on Schwartz-like spaces.
Shraban Das, Kanailal Mahato, Ahmed I. Zayed   +2 more
doaj   +1 more source