- fast Hadamard transform
- 快速哈大马特变换
Medical Chinese dictionary (湘雅医学词典). 2013.
fast Hadamard transform
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Hadamard transform — The Hadamard transform (also known as the Walsh Hadamard transform, Hadamard Rademacher Walsh transform, Walsh transform, or Walsh Fourier transform) is an example of a generalized class of Fourier transforms. It is named for the French… … Wikipedia
Fast Walsh–Hadamard transform — In computational mathematics, the Hadamard ordered fast Walsh–Hadamard transform (FWHTh) is an efficient algorithm to compute the Walsh–Hadamard transform (WHT). A naive implementation of the WHT would have a computational complexity of O(N^2).… … Wikipedia
Pseudo-Hadamard transform — The pseudo Hadamard transform is a reversible transformation of a bit string that provides cryptographic diffusion. See Hadamard transform.The bit string must be of even length, so it can be split into two bit strings a and b of equal lengths,… … Wikipedia
Hadamard (disambiguation) — Hadamard may refer to* Jacques Hadamard * Hadamard gate * Hadamard matrix * Hadamard s inequality * Hermite–Hadamard inequality * Walsh–Hadamard transform * Fast Walsh–Hadamard transform … Wikipedia
Hadamard code — The Hadamard code, named after Jacques Hadamard, is a system used for signal error detection and correction. It is one of the family of [2 n , n + 1, 2 n − 1] codes. Especially for large n it has a poor rate but it is capable of correcting many… … Wikipedia
Arithmetic complexity of the discrete Fourier transform — See Fast Fourier transform#Bounds on complexity and operation counts for a general summary of this issue.Bounds on the multiplicative complexity of FFTIn his PhD thesis in 1987 [1] , Michael Heidman focus on the arithmetic theory of complexity… … Wikipedia
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Jacket matrix — In mathematics, a Jacket matrix is a square matrix A= a {ij} of order n whose entries are from a field (including real field, complex field, finite field ), if : AA^{mathrm{*= A^{mathrm{*A= n I n where :A^{mathrm{* is the transpose of the matrix… … Wikipedia
Maximum length sequence — A maximum length sequence (MLS) is a type of pseudorandom binary sequence. They are bit sequences generated using maximal linear feedback shift registers and are so called because they are periodic and reproduce every binary sequence that can be… … Wikipedia
Time-of-flight mass spectrometry — (TOFMS) is a method of mass spectrometry in which ions are accelerated by an electric field of known strength. [Stephens, W. E., [http://link.aps.org/abstract/PR/v69/p674/s2 A Pulsed Mass Spectrometer with Time Dispersion] Phys. Rev. , 1946, 69 … Wikipedia
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