Definition, Meaning, Synonyms & Anagrams | English word DFT

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Definitions of DFT

1. Initialism of dry film thickness.
2. (maths) Initialism of discrete Fourier transform.
3. (physics, chemistry) Initialism of w:density functional theory.
4. Initialism of Department for Transport.

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Examples of Using DFT in a Sentence

• In mathematics, the discrete Fourier transform (DFT) converts a finite sequence of equally-spaced samples of a function into a same-length sequence of equally-spaced samples of the discrete-time Fourier transform (DTFT), which is a complex-valued function of frequency.
• A fast Fourier transform (FFT) is an algorithm that computes the Discrete Fourier Transform (DFT) of a sequence, or its inverse (IDFT).
• In mathematics, the discrete sine transform (DST) is a Fourier-related transform similar to the discrete Fourier transform (DFT), but using a purely real matrix.
• A discrete Hartley transform (DHT) is a Fourier-related transform of discrete, periodic data similar to the discrete Fourier transform (DFT), with analogous applications in signal processing and related fields.
• However, DFT was not considered accurate enough for calculations in quantum chemistry until the 1990s, when the approximations used in the theory were greatly refined to better model the exchange and correlation interactions.
• Rader of MIT Lincoln Laboratory, is a fast Fourier transform (FFT) algorithm that computes the discrete Fourier transform (DFT) of prime sizes by re-expressing the DFT as a cyclic convolution (the other algorithm for FFTs of prime sizes, Bluestein's algorithm, also works by rewriting the DFT as a convolution).
• While the DFT samples the Z plane at uniformly-spaced points along the unit circle, the chirp Z-transform samples along spiral arcs in the Z-plane, corresponding to straight lines in the S plane.
• In an attempt to obligate the DfT to provide funding for the Oxford Road upgrade to improve punctuality, Network Rail declared the Castlefield Corridor 'congested' in September 2019.
• Density functional theory (DFT) provides reliable methods for determining several forms of elastic moduli that characterise distinct features of a material's reaction to mechanical stresses.
• Early in 2008, as Chairman of the PAC, Leigh was embarrassed by relying on flawed Department for Transport (DfT) statistics to attack motorcyclists for tax evasion.
• For a known frequency, such as a musical note or a sinusoidal test signal, matching the frequency to a DFT bin can be prearranged by choices of a sampling rate and a window length that results in an integer number of cycles within the window.
• The Hadamard transform can be regarded as being built out of size-2 discrete Fourier transforms (DFTs), and is in fact equivalent to a multidimensional DFT of size.
• The multidimensional DFT matrix, in turn, is disintegrated into a set of factors, called functional primitives, which are individually identified with an underlying software/hardware computational design.
• The DfT now itself runs competitions for the award of passenger rail franchises, and, once awarded, monitors and enforces the contracts with the private sector franchisees.
• Q-Chem can perform a number of general quantum chemistry calculations, such as Hartree–Fock, density functional theory (DFT) including time-dependent DFT (TDDFT), Møller–Plesset perturbation theory (MP2), coupled cluster (CC), equation-of-motion coupled-cluster (EOM-CC), configuration interaction (CI), algebraic diagrammatic construction (ADC), and other advanced electronic structure methods.
• One prominent model is the so-called half-metallic ferromagnetic model, which is based on spin-polarized (SP) band structure calculations using the local spin-density approximation (LSDA) of the density functional theory (DFT) where separate calculations are carried out for spin-up and spin-down electrons.
• There are two types of TOC: most hold franchises let by the Department for Transport (DfT) through a tendering system, to operate services on certain routes for a specified duration, while a small number of open-access operators hold licences to provide supplementary services on chosen routes.
• In January 2017, Trenitalia won a bid from the Department for Transport (DfT) to run train operating company c2c from National Express which has a contract to operate the Essex Thameside franchise until November 2029.
• This method is sensitive to transient signals which can cause echos, requiring some padding (50% in USAC) in the DFT.
• In October 2006, the DfT issued the invitation to tender (ITT) to the four shortlisted bidders: Arriva, FirstGroup, National Express and Virgin Rail Group.
• The not-for-profit Sevenoaks Rail Travellers' Association (SRTA) corresponds and meets with Southeastern Railway, TfL, the DfT, MPs and other relevant parties to represent the interests of passengers using Sevenoaks and stations nearby – Bat & Ball, Dunton Green, Eynsford, Kemsing, Otford, and Shoreham.
• Compared to DFT (or FFT), which is characterized by perfect spectral resolution, but poor temporal information, SCA favours temporal information, but yields higher spectrum dispersion.
• DFT often is associated with design modifications that provide improved access to internal circuit elements such that the local internal state can be controlled (controllability) and/or observed (observability) more easily.
• Most commonly, the term "butterfly" appears in the context of the Cooley–Tukey FFT algorithm, which recursively breaks down a DFT of composite size n = rm into r smaller transforms of size m where r is the "radix" of the transform.
• The chromium–chromium quintuple bond has been analyzed with multireference ab initio and DFT methods, which were also used to elucidate the role of the terphenyl ligand, in which the flanking aryls were shown to interact very weakly with the chromium atoms, causing only a small weakening of the quintuple bond.

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