- (Heaviside unit) step function
- Математика: функция Хевисайда
Универсальный англо-русский словарь. Академик.ру. 2011.
(Heaviside unit) step function
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Heaviside step function — The Heaviside step function, H , also called the unit step function, is a discontinuous function whose value is zero for negative argument and one for positive argument.It seldom matters what value is used for H (0), since H is mostly used as a… … Wikipedia
Heaviside-Funktion — Die Heaviside Funktion, auch Theta , Treppen , Schwellenwert , Stufen , Sprung oder Einheitssprungfunktion genannt, ist eine in der Mathematik und Physik oft verwendete Funktion. Sie ist nach dem britischen Mathematiker und Physiker Oliver… … Deutsch Wikipedia
Step response — The step response of a system in a given initial state consists of the time evolution of its outputs when its control inputs are Heaviside step functions. In electronic engineering and control theory, step response is the time behaviour of the… … Wikipedia
Unit function — In number theory, the unit function is a completely multiplicative function on the positive integers defined as::varepsilon(n) = egin{cases} 1, mbox{if }n=1 0, mbox{if }n>1 end{cases} It is called the unit function because it is the identity… … Wikipedia
Dirac delta function — Schematic representation of the Dirac delta function by a line surmounted by an arrow. The height of the arrow is usually used to specify the value of any multiplicative constant, which will give the area under the function. The other convention… … Wikipedia
Sign function — In mathematics, the sign function is a mathematical function that extracts the sign of a real number. To avoid confusion with the sine function, this function is often called the signum function (after the Latin form of sign ).In mathematical… … Wikipedia
Green's function — In mathematics, Green s function is a type of function used to solve inhomogeneous differential equations subject to boundary conditions. The term is used in physics, specifically in quantum field theory and statistical field theory, to refer to… … Wikipedia
Meijer G-function — In mathematics, the G function was introduced by Cornelis Simon Meijer (1936) as a very general function intended to include most of the known special functions as particular cases. This was not the only attempt of its kind: the generalized… … Wikipedia
Indicator function — The graph of the indicator function of a two dimensional subset of a square. In mathematics, an indicator function or a characteristic function is a function defined on a set X that indicates membership of an element in a subset A of … Wikipedia
Ambiguity function — In pulsed radar and sonar signal processing, an ambiguity function isa two dimensional function of time delay and Doppler frequencychi( au,f) showing the distortion of an uncompensated matched filter (sometimes called pulse compression) due to… … Wikipedia
Rectangular function — The rectangular function (also known as the rectangle function, rect function, unit pulse, or the normalized boxcar function) is defined as::mathrm{rect}(t) = sqcap(t) = egin{cases}0 mbox{if } |t| > frac{1}{2} [3pt] frac{1}{2} mbox{if } |t| =… … Wikipedia
