first-order approximation
1First-order hold — The first order hold (FOH) is a mathematical model of the practical reconstruction of sampled signals that could be done by a conventional digital to analog converter (DAC) and an analog circuit called an integrator. For the FOH, the signal is… …
2Order of magnitude — An order of magnitude is the class of scale or magnitude of any amount, where each class contains values of a fixed ratio to the class preceding it. In its most common usage, the amount being scaled is 10 and the scale is the (base 10) exponent… …
3Order statistic — Probability distributions for the n = 5 order statistics of an exponential distribution with θ = 3 In statistics, the kth order statistic of a statistical sample is equal to its kth smallest value. Together with rank statistics, order statistics… …
4Order (mathematics) — Contents 1 In algebra 2 In arithmetic 3 In analysis 4 …
5Orders of approximation — In science, engineering, and other quantitative disciplines, orders of approximation refer to formal or informal terms for how precise an approximation is, and to indicate progressively more refined approximations: in increasing order of… …
6First Rays of the New Rising Sun — Infobox Album Name = First Rays of the New Rising Sun Type = studio Artist = Jimi Hendrix Released = April 22, 1997 Recorded = March 13, 1968, November 17, 1969–August 26, 1970, October 19, 1970, November 20, 1970 Genre = Rock, Psychedelic rock,… …
7Order-disorder — In quantum field theory and statistical mechanics in the thermodynamic limit, a system with a global symmetry can have more than one phase. For parameters where the symmetry is spontaneously broken, the system is said to be ordered. When the… …
8WKB approximation — In physics, the WKB (Wentzel–Kramers–Brillouin) approximation, also known as WKBJ (Wentzel–Kramers–Brillouin–Jeffreys) approximation, is the most familiar example of a semiclassical calculation in quantum mechanics in which the wavefunction is… …
9Slowly varying envelope approximation — In physics, the slowly varying envelope approximation (SVEA) is the assumption that the envelope of a forward travelling wave pulse varies slowly in time and space compared to a period or wavelength. This requires the spectrum of the signal to be …
10Paraxial approximation — In geometric optics, the paraxial approximation is an approximation used in ray tracing of light through an optical system (such as a lens).cite book | first=John E. | last=Greivenkamp | year=2004 | title=Field Guide to Geometrical Optics |… …
