Results 61 to 70 of about 246,074 (294)
New Algorithms for Computing a Single Component of the Discrete Fourier Transform [PDF]
, 2015 This paper introduces the theory and hardware implementation of two new algorithms for computing a single component of the discrete Fourier transform. In terms of multiplicative complexity, both algorithms are more efficient, in general, than the well ...
de Oliveira, H. M. +2 more
core
Inverse Discrete Fourier Transform-Discrete Fourier Transform Techniques for Generating and Receiving Spectrally Efficient Frequency Division Multiplexing Signals [PDF]
American Journal of Engineering and Applied Sciences, 2011 Problem statement: Spectrally Efficient Frequency Division Multiplexing (SEFDM) system promises bandwidth savings by multiplexing overlapped non-orthogonal sub-carriers. However, the loss of orthogonality results in increasing the complexity of generation and detection of the signal.
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Advanced Functional Materials, EarlyView.The versatile precursor‐assisted soft sphere close packing during slot‐die coating is investigated with in situ X‐ray scattering. The soft crystallization pathways towards a close packing involve multistep structural transitions such as surface nucleation, in‐plane, and out‐of‐plane crystallization.
Guangjiu Pan +14 more
wiley +1 more source
Remote Sensing, 2020 Pen aquaculture is the main form of aquaculture in some shallow lakes in eastern China. It is valuable to map the spatiotemporal changes of pen aquaculture in eutrophic lakes to assess its effect on water quality, thereby helping the relevant decision ...
Juhua Luo +8 more
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New sign uncertainty principles
Discrete Analysis, 2023 New sign uncertainty principles, Discrete Analysis 2023:9, 46 pp. The famous Heisenberg uncertainty principle is an inequality that states that the product of the variances of a function $f$ and its Fourier transform $\hat f$ is bounded below by an ...
Felipe Gonçalves +2 more
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A systematic comparison of deep learning methods for EEG time series analysis
Frontiers in Neuroinformatics, 2023 Analyzing time series data like EEG or MEG is challenging due to noisy, high-dimensional, and patient-specific signals. Deep learning methods have been demonstrated to be superior in analyzing time series data compared to shallow learning methods which ...
Dominik Walther +4 more
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The Fourier U(2) Group and Separation of Discrete Variables [PDF]
, 2011 The linear canonical transformations of geometric optics on two-dimensional screens form the group $Sp(4,R)$, whose maximal compact subgroup is the Fourier group $U(2)_F$; this includes isotropic and anisotropic Fourier transforms, screen rotations and ...
Vicent, Luis Edgar, Wolf, Kurt Bernardo
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Generalized Discrete Fourier Transform on the Base of Lagrange and Hermite Interpolation Formulas
Lobachevskii Journal of Mathematics, 2022 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sitnik, S. M. +2 more
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Advanced Functional Materials, EarlyView.Zinc(II) coordination complexes with tunable aryloxy‐imine ligands exhibit controllable supramolecular self‐assembly into hierarchical fibrous structures. Coordination‐driven stacking, not π–π interactions, enables gelation, dynamic assembly/disassembly, and enhanced nanomechanical properties.
Merlin R. Stühler +10 more
wiley +1 more source
The Fourier restriction and Kakeya problems over rings of integers modulo $N$
Discrete Analysis, 2018 The Fourier restriction and Kakeya problems over rings of integers modulo $N$, Discrete Analysis 2018:11, 18 pp. The _Fourier restriction problem_ is the following general question.
Jonathan Hickman, James Wright
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