Results 21 to 30 of about 20,022,546 (234)
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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Random fractional Fourier transform : stochastic perturbations along the axis of propagation [PDF]
, 1999 The fractional Fourier transform (FRT) is known to be optically implementable with use of a medium with a perfect radial quadratic-index profile. Using the quantum-mechanical operator formalism, we examine the effects on the FRT action of such a medium
Abe, Sumiyoshi, Sheridan, John T.
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Projection of acoustic fields using the Fourier transform [PDF]
, 1985 A method is presented for projecting acoustic fields using the Fourier transform. It is shown that the source velocity distribution can be represented by a number of sinusoids.
Yudelman, Errol
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Modified Fourier expansions: theory, construction and applications [PDF]
, 2010 Modified Fourier expansions present an alternative to more standard algorithms for the approximation of nonperiodic functions in bounded domains. This thesis addresses the theory of such expansions, their effective construction and computation, and ...
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Two-Dimensional Discrete Coupled Fractional Fourier Transform (DCFrFT)
Fractal and FractionalThe fractional Fourier transform is critical in signal processing and supports many applications. Signal processing is one notable application. Implementing the fractional Fourier transform requires discrete versions.
Asma Elshamy +2 more
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Objective Center-Finding Algorithm for Tropical Cyclones in Numerical Models
Atmosphere, 2019 Precise center-detection of tropical cyclones (TCs) is critical for dynamic analysis in high resolution model data. The existence of both smaller scale perturbations and larger scale circulations could reduce the accuracy of center positioning.
Chengwu Zhao +3 more
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Parameterising Arbitrary Shapes via Fourier Descriptors for Evidence-Gathering Extraction
, 1998 According to the formulation of the Hough transform it is possible to extract any shape that can be represented by an analytic equation with a number of free parameters.
Nixon, M.S., Aguado, A.S., Montiel, M.E.
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International Journal of Analysis and Applications, 2021 In this paper, a new two-dimensional quaternion fractional Fourier transform is developed. The properties such as linearity, shifting and derivatives of the quaternion-valued function are studied.
Khinal Parmar, V. R. Lakshmi Gorty
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Array-Beamspace Mapping for Planar Two-Dimensional Beam-Forming
IEEE Access, 2023 As sixth-generation (6G) communication systems manifest at carrier frequencies well into the millimeter-wave (mmW) spectrum, the ability of conventional digital beamforming techniques to handle the beam-bandwidth product is increasingly stressed ...
William L. Beardell +3 more
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E3S Web of Conferences, 2019 In modern systems of remote sensing two-dimensional fast Fourier transform (FFT) has been widely used for digital processing of satellite images and subsequent image filtering.
Noskov Mikhail +4 more
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