Results 31 to 40 of about 11,957,855 (289)
Trigonometric Interpolation Using the Discrete Fourier Transform [PDF]
, 2022 The Fourier transform (and all its versions, discrete/continuous/finite/infinite), covers deep and abstract mathematical concepts, and can easily overwhelm with detail.
Ponce Campuzano, Juan Carlos
core
Investigation of the stability of the oscillatory zone boundary mode in the perturbed one-dimensional Toda lattice [PDF]
Известия высших учебных заведений: Прикладная нелинейная динамикаThe goal of this paper is to investigate the stability of a dynamical regime corresponding to the vibrational mode with the shortest wavelength (known as the π-mode) in the Toda lattice with a cubic perturbation of the original potential.
Kedrov, Alexander Alekseevich +1 more
doaj +1 more source
An improved architecture for the adaptive discrete cosine transform [PDF]
, 1996 This paper presents a new approach to the efficient realisation of the discrete cosine transform for the specific case of interlaced image sequence coding.
Martin, F, Bull, DR
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Matrix-Vector Based Fast Fourier Transformations on SDR Architectures [PDF]
Advances in Radio Science, 2008 Today Discrete Fourier Transforms (DFTs) are applied in various radio standards based on OFDM (Orthogonal Frequency Division Multiplex). It is important to gain a fast computational speed for the DFT, which is usually achieved by using specialized Fast ...
Y. He +3 more
doaj
MODIFIED METHOD FOR SIGNAL DELAY ESTIMATION USING ROBUST DFT
Радіоелектронні і комп'ютерні системи, 2019 Modified method for estimating delay and direction of arrival for random wideband signals received by two displaced sensors and corrupted by non-Gaussian noise is designed.
Вячеслав Алексеевич Олейник +1 more
doaj +1 more source
Variational auto-encoder based deep compressed sensing on Raman spectroscopy
Smart Agricultural TechnologyRaman spectroscopy is a non-intrusive and rapid profiling technology. Its hardware depends on an ADC (Analog to Digital Converter) unit to convert photons into electronic signals.
Yinsheng Zhang, Menglei Liu, Haiyan Wang
doaj +1 more source
On the computational complexity of the general discrete fourier transform
Theoretical Computer Science, 1987 The complexity of computing the General Discrete Fourier Transform over group algebras of finite groups is studied. Starting with a short introduction to known results, the complexity gains of a new algorithm derived from Clifford's theorem are discussed.
openaire +3 more sources
Properties of continuous Fourier extension of the discrete cosine transform and its multidimensional generalization [PDF]
Journal of Mathematical Physics, 2004 A versatile method is described for the practical computation of the exact discrete Fourier transforms (DFT), both the direct and the inverse ones, of a continuous function g given by its values gj at the points of a uniform grid FN generated by conjugacy classes of elements of finite adjoint order N in the fundamental region F of compact semisimple ...
Atoyan, A., Patera, J.
openaire +2 more sources
Advanced Engineering Materials, EarlyView.Binder‐free laser powder bed fusion of 8YSZ with a femtosecond laser is used to map process windows linking scan strategy, heat accumulation, and grain growth. Time‐resolved thermography and simulations reveal thermal regimes that enable continuous, vitrified, and fine‐grained 8YSZ surface layers without absorptive additives and demonstrate ...
Markus Kühn +5 more
wiley +1 more source
Advanced Functional Materials, EarlyView.P4bm framework in NaNbO3‐Ba(Ti, Hf)O3 ferrodistortive relaxor entails short‐range and highly‐polar ferrodistortive orders. The abundant highly‐polar orders facilitate to increase entropy change, and robust octahedral oxygen tilt enables to impede thermal perturbations.
Feng Li +11 more
wiley +1 more source