Results 181 to 190 of about 17,536,892 (222)

Lattice Strain and Built‐In Field Synergistically Boost Urea Oxidation via Dynamic NiOOH Mediation at Multiphase Heterointerfaces

Advanced Materials, EarlyView.
A sulfur‐doped lignin‐derived carbon‐coated Ni‐NiO‐MoO2 nanorod array was synthesized, exhibiting enhanced UOR performance ‐ due to lattice‐strain and built‐in electric field effects by multiphase heterogeneous interface in Ni‐NiO‐MoO2@SC, excellent corrosion resistance, mass‐transport ability, and long‐term stability (500 mA cm−2 at 1.53 V for 500 h ...
Jiawei Li, Liancen Li, Guangfu Qian, Zishan Cai, Yiping Cao, Yihao Xu, Ruyu Zhang, Jinli Chen, Changzhou Chen, Panagiotis Tsiakaras   +9 more
wiley   +1 more source

Topological Spin‐Texture Transitions in van der Waals Magnets Revealed by X‐Ray Fourier Transform Holography

Advanced Materials, EarlyView.
Applied here for the first time to a 2D material, high‐resolution synchrotron x‐ray Fourier transform holography directly images topological spin textures in Fe3GeTe2. Combined with atomistic tight‐binding simulations including itinerant electrons and Rashba spin‐orbit coupling, the approach reveals labyrinth, skyrmion, and mixed phases, and uncovers ...
Sourav Chowdhury, Soumyaranjan Dash, Michael Schneider, Christopher Klose, Chithra H. Sharma, Lisa‐Marie Kern, Tim A. Butcher, Josefin Fuchs, Santanu Pakhira, Samik DuttaGupta, Takashi Taniguchi, Kenji Watanabe, Sujit Das, Sanjeev Kumar, Bastian Pfau, Amir‐Abbas Haghighirad, Moritz Hoesch   +16 more
wiley   +1 more source

Computation‐Less, Bias‐Free, and Ultra‐Broadband Photodetector for On‐Chip Edge Extraction

Advanced Materials, EarlyView.
A computation‐less, bias‐free, and ultra‐broadband photodetector directly converts local optical‐intensity gradients into signed photocurrents through a position‐dependent bi‐directional photoresponse. This intrinsic physical sensing mechanism enables single‐pixel edge extraction from the near‐infrared to the long‐wave infrared at room temperature ...
Jintao Fu, Hao Jiang, Xingsi Liu, Fakun Wang, Yang Peng, Qi Jie Wang, Weibo Gao, Xingzhan Wei, Cheng‐Wei Qiu   +8 more
wiley   +1 more source

Spectrally Coordinated Plasmonic–Photothermal Photocatalysts for Mineralization of Mixed Indoor VOCs Under White LED Illumination

Advanced Materials, EarlyView.
A plasmonic–photothermal–photocatalytic hybrid comprising Cu(II)‐grafted TiO2, yolk–shell Au@SiO2, and reduced graphene oxide sheets (CuT/AuSi‐GS) harvests full‐spectrum white light‐emitting diode (LED) light via complementary photocatalytic oxidation, localized surface‐plasmon‐resonance‐induced electric‐field enhancement, and photothermal acceleration.
Minhyung Lee, Geun Young Kim, Gahye Shin, Haein Cho, Juwon Lee, Jinglin Wen, Wooyul Kim, Changha Lee, Kangwoo Cho, Jae‐Hyuk Kim, Hyoung‐il Kim   +10 more
wiley   +1 more source

Manipulation of short time Fourier transforms

, 1991
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Short-Time Fractional Fourier Transform and Its Applications

IEEE Transactions on Signal Processing, 2010
The fractional Fourier transform (FRFT) is a potent tool to analyze the chirp signal. However, it fails in locating the fractional Fourier domain (FRFD)-frequency contents which is required in some applications. The short-time fractional Fourier transform (STFRFT) is proposed to solve this problem.
Ran Tao
exaly   +2 more sources

Shift-invariance of short-time Fourier transform in fractional Fourier domains

Journal of the Franklin Institute, 2009
Let \(T\) be a linear time-frequency distribution with kernel \(K\) acting on a function \(x(t)\) evaluated at a time \(t\) and frequency \(f\) as follows \[ T(x) (t,f) = \int K(t, f, \tau) \, x(\tau)\, d\tau. \] For example, the short-time Fourier transform with window \(w\) is defined as \[ \text{{STFT}} (x) (t,f) = \int x(\tau) \overline{w}(t-\tau) \
exaly   +4 more sources

Sliding Short-Time Fractional Fourier Transform

IEEE Signal Processing Letters, 2022
Gaowa Huang
exaly   +3 more sources

Synchrosqueezing-Based Short-Time Fractional Fourier Transform

IEEE Transactions on Signal Processing, 2023
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhichun Zhao, Gang Li 0008
openaire   +2 more sources

Time-Stretched Short-Time Fourier Transform

IEEE Transactions on Instrumentation and Measurement, 2004
The authors propose and demonstrate the time-stretched short-time Fourier transform (TS-STFT) technique to overcome the limitation of an analog-digital converter (ADC) in the time-frequency analysis of ultrafast signals. Experimentally, the time-frequency analysis of highly chirped RF signals, with a chirp rate as high as 350 GHz/ns, is demonstrated ...
Abul Nuruzzaman, Ozdal Boyraz, Bahram Jalali   +2 more
openaire   +2 more sources