Results 141 to 150 of about 790,476 (361)

Estimating the power spectrum of a discrete cosmic momentum field with fast Fourier transform [PDF]

, 2020
Jun Pan
openalex   +1 more source

Full‐Domain 3D Digital Twin for Comprehensive Analysis and Validation of Standing Surface Acoustic Wave Generation on LiNbO3 Substrate

Advanced Materials Technologies, EarlyView.
A full‐domain 3D digital twin of a standing surface acoustic wave (SSAW) device on 128° YX LiNbO3 is developed and experimentally validated. The predictive power of the model is confirmed by electrical characterisation and laser Doppler vibrometry measurements, which show excellent agreement with simulations.
Felice Alberto Sfregola, Annalisa Volpe, Andrea Zifarelli, Massimiliano Benetti, Domenico Cannatà, Vincenzo Spagnolo, Pietro Patimisco   +6 more
wiley   +1 more source

Modelling Temporal Information Using Discrete Fourier Transform for Recognizing Emotions in User-generated Videos [PDF]

, 2016
Haimin Zhang, Min Xu
openalex   +1 more source

Bespoke Fractal Sampling Patterns for Discrete Fourier Space via the\n Kaleidoscope Transform [PDF]

, 2021
Jacob M. White, ‪Stuart Crozier‬, Shekhar S. Chandra   +2 more
openalex   +1 more source

Nature‐Inspired Functional Aerogel Fibers with Engineerable Core–Shell Morphology

Advanced Materials Technologies, EarlyView.
Nature‐inspired core–shell aerogel fibers are fabricated through coaxial wet‐spinning, which combines a polyimide shell with MXene core. The fibers exhibited absorption‐dominant EMI shielding, low thermal conductivity, and mechanical robustness, demonstrating multifunctional potential for wearable electronics and advanced smart textiles.
Ali Akbar Isari, Majed Amini, Mojdeh Rezaei‐khamseh, Vahid Rad, Hatef Yousefian, Masoud Soroush, Mohammad Arjmand   +6 more
wiley   +1 more source

Inverse Design in Nanophotonics via Representation Learning

Advanced Optical Materials, EarlyView.
This review frames machine learning (ML) in nanophotonics through a classification based on where ML is applied. We categorize methods as either output‐side, which create differentiable surrogates for solving Maxwell's partial differential equations (PDEs), or input‐side, which learn compact representations of device geometry.
Reza Marzban, Ali Adibi, Raphaël Pestourie   +2 more
wiley   +1 more source

Techniques for Accelerometer Reading Processing on Railway Transport Using Wavelet Transform

Известия высших учебных заведений России: Радиоэлектроника
Introduction. Safety issues of railway transport are inevitably connected with the condition of railway tracks and railway wheels. Various defects, such as irregularities of the railway track, may lead to emergencies and incidents.
A. M. Boronakhin, A. V. Bolshakova, D.  M. Klionskiy, D. Yu. Larionov, R. V. Shalymov   +4 more
doaj   +1 more source

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

Advanced Optical Materials, EarlyView.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova, Katsiaryna Pantsialeyeva, Dmitry Gorbach, Alexei Tolstik, Sergei Slussarenko Jr., Alina Karabchevsky   +5 more
wiley   +1 more source

Metalens Array for Complex‐Valued Optical Discrete Fourier Transform

Advanced Optical Materials, EarlyView.
A single‐layer metalens‐array device performs complex‐to‐complex discrete Fourier transforms (DFTs) optically with O(N) digital time complexity. Integrated interferometric phase retrieval and error mitigation scheme enables accurate, compact, and low‐power optical computing. The approach provides a versatile framework for implementing arbitrary complex‐
Randy Stefan Tanuwijaya, Lap So, Wai Chun Wong, Tailin An, Jingdi Zhang, Wing Yim Tam, Jensen Li   +6 more
wiley   +1 more source

Equivalence between dynamic mode decomposition and temporal discrete Fourier transform for zero mean numerical and experimental data. Analytical solution. Applications to 3D CFD results and to experimental films

, 2021
Frédéric Lévy
openalex   +1 more source