Results 11 to 20 of about 50 (49)
Some of the next articles are maybe not open access.
2D grid architectures for the DFT and the 2D DFT
Journal of VLSI signal processing systems for signal, image and video technology, 1993In these algorithms, the 1D and the 2D discrete Fourier transform (DFT) matrices are factorized into the Kronecker product of DFT matrices of smaller size. The architectures consist of 2D grid of processing elements with temporal and spatial locality of connections.
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Journal of Chemical Theory and Computation, 2009
A diversity-oriented approach for the generation of thermochemical benchmark sets is presented. Test sets consisting of randomly generated "artificial molecules" (AMs) are proposed that rely on systematic constraints rather than uncontrolled chemical biases.
Martin, Korth, Stefan, Grimme
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A diversity-oriented approach for the generation of thermochemical benchmark sets is presented. Test sets consisting of randomly generated "artificial molecules" (AMs) are proposed that rely on systematic constraints rather than uncontrolled chemical biases.
Martin, Korth, Stefan, Grimme
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IEEE Signal Processing Magazine, 2004
Those properties allow us to create Table 1, listing the appropriate arctan approximation based on the octant location of complex x. So we have to check the signs of Q and I, and see if |Q | > |I |, to determine the octant location and then use the appropriate approximation in Table 1.
Eric Jacobsen, Richard G. Lyons
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Those properties allow us to create Table 1, listing the appropriate arctan approximation based on the octant location of complex x. So we have to check the signs of Q and I, and see if |Q | > |I |, to determine the octant location and then use the appropriate approximation in Table 1.
Eric Jacobsen, Richard G. Lyons
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IEEE Transactions on Acoustics, Speech, and Signal Processing, 1988
An algorithm is proposed to compute the inverse complex DFT (discrete Fourier transform) through the use of a forward DFT. The computation involves twice exchanges of the real and imaginary parts before and after execution of the forward DFT.
Pierre Duhamel +2 more
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An algorithm is proposed to compute the inverse complex DFT (discrete Fourier transform) through the use of a forward DFT. The computation involves twice exchanges of the real and imaginary parts before and after execution of the forward DFT.
Pierre Duhamel +2 more
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IEEE Transactions on Instrumentation and Measurement, 2020
In this article, it is shown how to estimate the frequency response function of a linear system using a three-level digital-to-analog converter (DAC) and a 1-bit analog-to-digital converter (ADC). Estimation requires the usage of a three-level periodic stimulus signal and a sinewave, used as a dither signal to improve the effective resolution of the 1 ...
Paolo Carbone +3 more
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In this article, it is shown how to estimate the frequency response function of a linear system using a three-level digital-to-analog converter (DAC) and a 1-bit analog-to-digital converter (ADC). Estimation requires the usage of a three-level periodic stimulus signal and a sinewave, used as a dither signal to improve the effective resolution of the 1 ...
Paolo Carbone +3 more
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Componentwise conditioning of the DFT
Calcolo, 2002The authors estimate the mixed and componentwise condition numbers of the DFT. Further, they determine vectors of componentwise modulus one such that their DFT has the same property.
BOZZO, Enrico, FASINO, Dario, MENCHI O.
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A DFT study of aminonitroimidazoles
Journal of Molecular Modeling, 2011Density functional theory (DFT) calculations at the B3LYP/aug-cc-pVDZ level were performed to explore the geometric and electronic structures, band gaps, thermodynamic properties, densities and performances of aminonitroimidazoles. The calculated performance properties, stabilities and sensitivities of the model compounds appear to be promising ...
P, Ravi +3 more
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IEEE Transactions on Acoustics, Speech, and Signal Processing, 1988
A.E. Kahveci and E.L. Hall (see IEEE Trans. Comput., vol.C-23, no.9, p.976-81, Sept. 1974) introduced the concept of filtering discrete Fourier transform (DFT) spectra in the Walsh sequency domain. This is accomplished by finding a real and block-diagonal Walsh filter matrix G/sub w/ in the Walsh domain that performs the sample filtering operation as ...
Christopher J. Zarowski +2 more
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A.E. Kahveci and E.L. Hall (see IEEE Trans. Comput., vol.C-23, no.9, p.976-81, Sept. 1974) introduced the concept of filtering discrete Fourier transform (DFT) spectra in the Walsh sequency domain. This is accomplished by finding a real and block-diagonal Walsh filter matrix G/sub w/ in the Walsh domain that performs the sample filtering operation as ...
Christopher J. Zarowski +2 more
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Journal of Hazardous Materials, 2009
In this study, all possible mono-, di- and tri-nitro-substituted triazine compounds have been considered as potential candidates for high-energy density materials (HEDMs) by using quantum chemical treatment. Geometric and electronic structures, thermodynamic properties and detonation performances of these nitro-substituted triazines have been ...
Camur, Yakup +3 more
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In this study, all possible mono-, di- and tri-nitro-substituted triazine compounds have been considered as potential candidates for high-energy density materials (HEDMs) by using quantum chemical treatment. Geometric and electronic structures, thermodynamic properties and detonation performances of these nitro-substituted triazines have been ...
Camur, Yakup +3 more
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DFT Calculations on Heterocyclacenes
Organic Letters, 2009Two different types of cyclacenes utilizing eight-membered or six-membered rings containing divalent sulfur and nitrogen atoms have been investigated by theoretical means with respect to their geometries and relative energies using DFT calculations.
Kornmayer, Stefan C. +2 more
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