Results 11 to 20 of about 86,855 (259)
Two-Dimensional Fourier-Transform Spectroscopy of Potassium Vapor [PDF]
Conference on Lasers and Electro-Optics 2010, 2010 Optical two-dimensional Fourier-transformed (2DFT) spectroscopy is used to study the coherent optical response of potassium vapor in a thin transmission cell. Rephasing and non-rephasing spectra of the D1 and D2 transitions are obtained and compared to numerical simulations.
Dai, X. +3 more
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EURASIP Journal on Wireless Communications and Networking, 2023 In this paper, a two-dimensional generalized weighted fractional Fourier transform (2DGWFRFT) and constellation scrambling (CS)-based secure spatial modulation (SM) scheme, called 2DGWFRFT-CS-SM, is proposed to enhance the physical layer security (PLS ...
Yongxin Huang +3 more
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Visible–infrared two-dimensional Fourier-transform spectroscopy [PDF]
Optics Letters, 2002 We report on a new class of optical multidimensional Fourier-transform spectroscopy associated with a visible excitation-infrared emission configuration, in which the emitted field results from second-order optical nonlinearities. This configuration is demonstrated on a phase-matched sample of known nonlinear response by coherent measurement of the mid-
Belabas, Nadia, Joffre, Manuel
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Frontiers in Earth Science, 2023 The day/night band channel on the JPSS series of satellites can detect the light and dark fringes of oceanic internal waves due to the reflectivity difference caused by the roughness of the sea surface under moon flare conditions.
Hao Li +5 more
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Digital processing of space images using global filtering in the frequency area [PDF]
E3S Web of Conferences, 2021 In modern systems, remote sensing widespread two-dimensional fast Fourier transform (FFT) for processing satellite images and the subsequent image filtering.
Tutatchikov Valeriy, Noskov Mikhail
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Alexandria Engineering Journal, 2021 In this communication we have studied well known physical process of two-dimensional advection–diffusion phenomena. The advection–diffusion equation is time-fractionalized by exploiting Atangana-Baleanu fractional derivative operator.
Itrat Abbas Mirza +4 more
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A Two-Dimensional Precision Level for Real-Time Measurement Based on Zoom Fast Fourier Transform
Micromachines, 2023 This paper proposes a two-dimensional precision level for real-time measurement using a zoom fast Fourier transform (zoom FFT)-based decoupling algorithm that was developed and integrated in an FPGA.
Haijin Fu +8 more
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IET Computer Vision, 2016 A fingerprint image with non‐uniform ridge frequencies can be considered as a two‐dimensional dynamic signal. A non‐uniform stress on the sensing area applied during fingerprint acquisition may result in a non‐linear distortion that disturbs the local ...
Mubeen Ghafoor +2 more
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One-dimensional Quaternion Fourier Transform and Some Applications
Bulletin of Computational Applied Mathematics, 2021 The Fourier transform is a very useful tool in many areas. This transform has been defined in many contexts, as complex numbers, quaternions, and Clifford algebras.
Eusebio Ariza García +2 more
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Nihon Kikai Gakkai ronbunshu, 2021 The vibration generated at the contact point between a tool blade and a machined surface during cutting significantly influences the generation mechanism of regenerated chatter vibration.
Nobutoshi OZAKI +4 more
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