Results 231 to 240 of about 1,334,101 (280)

Discrimination between <i>Mycobacterium tuberculosis</i> and <i>Mycobacterium bovis</i> using Fourier transform infrared spectroscopy. [PDF]

One Health
Guterres KB, Silva-Pereira TT, Oliveira R, Moonen CGJ, Heinemann MB, Araújo F, Palaci M, de Souza GO, Guimarães NS, Guimarães AMS.   +9 more
europepmc   +1 more source

Artemisinin as a novel endodontic irrigant: <i>In vitro</i> assessment of antimicrobial, antioxidant, and Fourier transform infrared-based structural characterization. [PDF]

J Conserv Dent Endod
Jain N, Devadiga D, Rao RD, Ravinanthanan M, Shetty SS, Gomes AA.   +5 more
europepmc   +1 more source

FFTMed: leveraging fast-fourier transform for a lightweight and adversarial-resilient medical image segmentation framework. [PDF]

Sci Rep
Pham VT, Ha MH, Bui BVQ, Hy TS.
europepmc   +1 more source

Rapid single-live-cell scanning <i>via</i> Fourier-transform infrared (FTIR) microscopy to elucidate microplastic-cell interactions. [PDF]

MethodsX
Friedrich HKJ, Alshareef OA, Wright SL, Cinque G, Chan KLA.   +4 more
europepmc   +1 more source

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The Fourier transform and the discrete Fourier transform

Inverse Problems, 1989
This paper gives an error bound in computing the Fourier transform for a square summable function by means of the discrete Fourier transform. In detail description, the error bound depends on the number of samples, the interval where the samples are taken, the interval where the Fourier transform is being approximated, the local averaging in the time ...
Auslander, Louis, Grünbaum, F. Alberto
openaire   +2 more sources

On Fourier Series on the Torus and Fourier Transforms

Mathematical Notes, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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The Fourier Transform

Scientific American, 1989
To calculate a transform, just listen. The ear automatically performs the calculation, which the intellect can execute only after years of mathematical education. The ear formulates a transform by converting sound-the waves of pressure traveling through time and the atmosphere-into a spectrum, a description of the sound as a series of volumes at ...
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On Fourier-Stieltjes Transforms

Canadian Journal of Mathematics, 1955
Let be the class of bounded non-decreasing functions defined on the real line which are normalized by the conditions ϕ(− ∞) = 0 , ϕ(t + 0) = ϕ(t).Let be the class of Fourier-Stieltjes transforms of elements of i.e. the elements of and are connected by the relationwhere ϕ ∊ and Φ ∊ .It is well known, and easy to verify that this mapping from to ...
Calderón, Alberto P., Devinatz, A.
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Accuracy of the Discrete Fourier Transform and the Fast Fourier Transform

SIAM Journal on Scientific Computing, 1996
Accuracy of the discrete Fourier transform (DFT) and the fast Fourier transform (FFT) depends on the accuracy of the twiddle factors entirely. For accurate twiddle factor tables, this paper recommends to compute the sine/cosine functions with high precision arithmetic along the algorithms in terms of faster converging approximations, such as rational ...
openaire   +1 more source

RNS Fourier transforms

ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003
A novel approach to the definition of the roots of unity in the RNS (residue number system) is presented. The definition is based on a suitable polar representation of the complex residues. The resulting RNS Fourier transform provides an algorithm for performing circular convolutions characterized by flexibility in terms of length, computational cost ...
Pietro Burrascano, Gian Carlo Cardarilli, Roberto Lojacono, Giuseppe Martinelli, Mario Salerno   +4 more
openaire   +2 more sources