Results 271 to 280 of about 101,618 (327)

Fractional-Order Ultrasonic Sensing for Monitoring Microstructural Evolution in Cementitious Materials. [PDF]

Sensors (Basel)
Zheng H, Lu C, Zhou X, Jia X, Lv X, Shi Z, Zhang G.   +6 more
europepmc   +1 more source

Optimized bio-signal reconstruction and watermarking via enhanced fractional orthogonal moments. [PDF]

Sci Rep
Hassan G, Hosny KM, Fathi IS.
europepmc   +1 more source

PhaseT3M: 3D imaging at 1.6 Å resolution via electron cryo-tomography with nonlinear phase retrieval. [PDF]

Nat Commun
Lee J, Song SW, Cho MG, Varnavides G, Ribet SM, Ophus C, Scott MC, Whittaker ML.   +7 more
europepmc   +1 more source

Integrated Sensing and Communication Using Random Padded OTFS with Reduced Interferences. [PDF]

Sensors (Basel)
Karpovich P, Zielinski TP.
europepmc   +1 more source

Rotation Invariant Texture Analysis Using Radon and Fractional Fourier Transform

, 2014
Fakhordin Mohammadi, Junbin Gao, Daming Shi   +2 more
openalex   +1 more source

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Fractional finite Fourier transform

Journal of the Optical Society of America A, 2004
We show that a fractional version of the finite Fourier transform may be defined by using prolate spheroidal wave functions of order zero. The transform is linear and additive in its index and asymptotically goes over to Namias's definition of the fractional Fourier transform.
Kedar, Khare, Nicholas, George
openaire   +2 more sources

Fractional discrete Fourier transforms

Optics Letters, 1996
Direct calculation of fractional Fourier transforms from the expressions derived for their optical implementation is laborious. An extension of the discrete Fourier transform would have only O(N(2)) computational complexity. We define such a system, offer a general way to compute the fractional discrete Fourier transform matrix, and numerically ...
Z T, Deng, H J, Caulfield, M, Schamschula   +2 more
openaire   +2 more sources

Random fractional Fourier transform

Optics Letters, 2007
We propose a novel random fractional Fourier transform by randomizing the transform kernel function of the conventional fractional Fourier transform. The random fractional Fourier transform inherits the excellent mathematical properties from the fractional Fourier transform and can be easily implemented in optics.
Zhengjun, Liu, Shutian, Liu
openaire   +2 more sources