amplitude function
11Describing function — The Describing function (DF) method of Nikolay Mitrofanovich Krylov and Nikolay Bogolyubov is an approximate procedure for analyzing certain nonlinear control problems. It is based on quasi linearization, which is the approximation of the non… …
12Optical transfer function — The optical transfer function (OTF) of an imaging system (camera, video system, microscope etc) is the true measure of resolution (image sharpness) that the system is capable of. The common practice of defining resolution in terms of pixel count… …
13Probability amplitude — In quantum mechanics, a probability amplitude is a complex valued function that describes an uncertain or unknown quantity. For example, each particle has a probability amplitude describing its position. This amplitude is the wave function,… …
14Partition function (quantum field theory) — In quantum field theory, we have a generating functional, Z [J] of correlation functions and this value, called the partition function is usually expressed by something like the following functional integral::Z [J] = int mathcal{D}phi e^{i(S… …
15Transfer function — A transfer function (also known as the system function[1] or network function) is a mathematical representation, in terms of spatial or temporal frequency, of the relation between the input and output of a linear time invariant system. With… …
16wave function — Physics. 1. a solution of a wave equation. 2. (in quantum mechanics) a mathematical function, found by solving a quantum mechanical wave equation, that is used to predict the outcome of measurements on physical systems. * * * Variable quantity… …
17Airy function — This article is about the Airy special function. For the Airy stress function employed in solid mechanics, see Stress functions. In the physical sciences, the Airy function Ai(x) is a special function named after the British astronomer George… …
18Point spread function — The point spread function (PSF) describes the response of an imaging system to a point source or point object. A related but more general term for the PSF is a system s impulse response. The PSF in many contexts can be thought of as the extended… …
19Ambiguity 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… …
20Double exponential function — A double exponential function (red curve) compared to a single exponential function (blue curve). A double exponential function is a constant raised to the power of an exponential function. The general formula is , which grows much more quickly… …
