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In control systems theory, the describing function (DF) method, developed by Nikolay Mitrofanovich Krylov and Nikolay Bogoliubov in the 1930s, and extended
Describing_function
Association of one output to each input
mathematics, a function from a set X to a set Y assigns to each element of X exactly one element of Y. The set X is called the domain of the function and the
Function_(mathematics)
Reason for a change under natural selection; in physiology, what a system does
of describing function, even though its applicability is disputed. In contemporary philosophy of biology, there are three major accounts of function in
Function_(biology)
input describing functions (HOSIDF) were first introduced by dr. ir. P.W.J.M. Nuij. The HOSIDFs are an extension of the sinusoidal input describing function
Higher-order sinusoidal input describing function
Higher-order_sinusoidal_input_describing_function
Function specifying the behavior of a component in an electronic or control system
a transfer function (also known as system function or network function) of a system, sub-system, or component is a mathematical function that models
Transfer_function
Family of solutions to related differential equations
Bessel functions are a class of special functions that commonly appear in problems involving wave motion, heat conduction, and other physical phenomena
Bessel_function
Functions of an angle
mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are real functions which relate an angle of
Trigonometric_functions
Extension of the factorial function
gamma function (represented by Γ {\displaystyle \Gamma } , capital Greek letter gamma) is the most common extension of the factorial function to complex
Gamma_function
Sigmoid shape special function
mathematics, the error function (also called the Gauss error function), often denoted by e r f {\displaystyle \mathbf {erf} } , is the function erf ( z ) = 2
Error_function
Function describing equilibrium states of a system
state function describes equilibrium states of a system, thus also describing the type of system. A state variable is typically a state function so the
State_function
Function modeling methodology for describing manufacturing functions
Function Modeling; where ICAM is Integrated Computer-Aided Manufacturing) is a function modeling methodology for describing manufacturing functions,
IDEF0
Asymmetric sigmoid function
Gompertz function is a type of mathematical model for a time series, named after Benjamin Gompertz (1779–1865). It is a sigmoid function which describes growth
Gompertz_function
Function with a repeating pattern
periodic function is a function that repeats its values at regular intervals. For example, the trigonometric functions, which are used to describe waves
Periodic_function
Multivalued function in mathematics
In mathematics, the Lambert W function, also called the omega function or product logarithm, is a multivalued function, namely the branches of the converse
Lambert_W_function
Type of function in linear algebra
sublinear function (or functional as is more often used in functional analysis), also called a quasi-seminorm, on a vector space is a real-valued function with
Sublinear_function
Mathematical description of quantum state
the name "wave function", and gives rise to wave–particle duality. However, whether the wave function in quantum mechanics describes a kind of physical
Wave_function
Function that is continuous everywhere but differentiable nowhere
mathematics, the Weierstrass function, named after its discoverer, Karl Weierstrass, is an example of a real-valued function that is continuous everywhere
Weierstrass_function
Concept in aerodynamics
This is directly related to the Küssner function, used in describing the effect. Both the effect and function are named after Hans Georg Küssner (1900–1984)
Küssner_effect
Mathematical function having a characteristic S-shaped curve or sigmoid curve
sigmoid function is any mathematical function whose graph has a characteristic S-shaped or sigmoid curve. A common example of a sigmoid function is the
Sigmoid_function
Function describing the effects of feedback on a control system
In control theory, a closed-loop transfer function is a mathematical function describing the net result of the effects of a feedback control loop on the
Closed-loop_transfer_function
Mathematical function
In mathematics, a Gaussian function, often simply referred to as a Gaussian, is a function of the base form f ( x ) = exp ( − x 2 ) {\displaystyle f(x)=\exp(-x^{2})}
Gaussian_function
S-shaped curve
A logistic function or logistic curve is a common S-shaped curve (sigmoid curve) with the equation f ( x ) = L 1 + e − k ( x − x 0 ) {\displaystyle f(x)={\frac
Logistic_function
Generalized function whose value is zero everywhere except at zero
Dirac delta function (or δ {\displaystyle {\boldsymbol {\delta }}} distribution), also known as the unit impulse, is a generalized function on the real
Dirac_delta_function
Mathematical function
the beta function, also called the Euler integral of the first kind, is a special function that is closely related to the gamma function and to binomial
Beta_function
Theory of language
defined six functions of language (or communication functions), according to which an effective act of verbal communication can be described. Each of the
Jakobson's functions of language
Jakobson's_functions_of_language
Representation on functions in computer engineering
concentrates on describing the dynamic process. The main concept in this modeling perspective is the process, this could be a function, transformation
Function_model
Degree of differentiability of a function or map
In mathematical analysis, the smoothness of a function or map describes the extent to which it has derivatives that exist and vary continuously. Given
Smoothness
Topics referred to by the same term
potential theory The potential function of a potential game In the potential method of amortized analysis, a function describing an investment of resources
Potential_function
Mathematical functions
The hyperbolastic functions, also known as hyperbolastic growth models, are mathematical functions that are used in medical statistical modeling. These
Hyperbolastic_functions
Mapping arbitrary data to fixed-size values
A hash function is any function that can be used to map data of arbitrary size to fixed-size values, though there are some hash functions that support
Hash_function
author of the edge-of-the-wedge theorem, Krylov–Bogolyubov theorem, describing function and multiple important contributions to quantum mechanics Vladimir
List of Russian mathematicians
List_of_Russian_mathematicians
Output of a dynamic system when given a brief input
equations describing such objects. Since the impulse function contains all frequencies (see the Fourier transform of the Dirac delta function, showing
Impulse_response
Analytic function that does not satisfy a polynomial equation
mathematics, a transcendental function is an analytic function that does not satisfy a polynomial equation whose coefficients are functions of the independent variable
Transcendental_function
Special functions of several complex variables
mathematics, theta functions are special functions of several complex variables. Fundamentally, they are a family of continuous functions which encode the
Theta_function
Correlation as a function of distance
targets Correlation function (astronomy) – Function describing the distribution of galaxies in the universe Correlation function (statistical mechanics) –
Correlation_function
Objects extending the notion of functions
distributions. Generalized functions are especially useful for treating discontinuous functions more like smooth functions, and describing discrete physical phenomena
Generalized_function
Mathematical function
In mathematics, the Jacobi elliptic functions are a set of basic elliptic functions. They are found in the description of the motion of a pendulum, as
Jacobi_elliptic_functions
Mathematical concept
In mathematics, the inverse function of a function f (also called the inverse of f) is a function that undoes the operation of f. The inverse of f exists
Inverse_function
Type of functional equation (mathematics)
{du}{dx}}=u^{2}+4.} Second-order nonlinear (due to sine function) ordinary differential equation describing the motion of a pendulum of length L: L d 2 u d x
Differential_equation
Control theory for nonlinear or time-variant systems
techniques for analyzing nonlinear feedback systems (see, e.g., and ): Describing function method Phase plane method Lyapunov stability analysis Singular perturbation
Nonlinear_control
Quickly growing function
Ackermann function, named after Wilhelm Ackermann, is one of the simplest and earliest-discovered examples of a total computable function that is not
Ackermann_function
Relationship between electrical signal and light
transfer functions to describe the relationship between electrical signal, scene light and displayed light. The opto-electronic transfer function (OETF)
Transfer_functions_in_imaging
Continuous function that is not absolutely continuous
In mathematics, the Cantor function is an example of a function that is continuous, but not absolutely continuous. It is a notorious counterexample in
Cantor_function
Class of mathematical functions
elliptic functions are elliptic functions that take a particularly simple form. They are named for Karl Weierstrass. This class of functions is also referred
Weierstrass_elliptic_function
Formal power series
generating function is a representation of an infinite sequence of numbers as the coefficients of a formal power series. Generating functions are often
Generating_function
Mathematical transform that expresses a function of time as a function of frequency
takes a function as input and outputs another function that describes the extent to which various frequencies are present in the original function. The output
Fourier_transform
Describes approximate behavior of a function
Big O notation is a mathematical notation that describes the approximate size of a function on a domain. Big O is a member of a family of notations invented
Big_O_notation
Program function without side effects
In computer programming, a pure function is a function that has the following properties: the function return values are identical for identical arguments
Pure_function
Patterns used in computer programming
glob() (/ɡlɒb/) is a libc function for globbing, which is the archetypal use of pattern matching against the names in a filesystem directory such that
Glob_(programming)
A Chapman function, denoted ch, describes the integration of an atmospheric parameter along a slant path on a spherical Earth, relative to the vertical
Chapman_function
Description of continuous random distribution
probability density function (PDF), density function, or simply density of an absolutely continuous random variable, is a function whose value at any given
Probability_density_function
Functions such that f(–x) equals f(x) or –f(x)
In mathematics, an even function is a real function such that f ( − x ) = f ( x ) {\displaystyle f(-x)=f(x)} for every x {\displaystyle x} in its domain
Even_and_odd_functions
Function used in signal processing
processing and statistics, a window function (also known as an apodization function or tapering function) is a mathematical function that is zero-valued outside
Window_function
Mathematical function, inverse of an exponential function
to base b, written logb x = y, so log10 1000 = 3. As a single-variable function, the logarithm to base b is the inverse of exponentiation with base b.
Logarithm
Thesis on the nature of computability
definition of computable function, mathematicians often used the informal term effectively calculable to describe functions that are computable by paper-and-pencil
Church–Turing_thesis
Function for incompressible divergence-free flows in two dimensions
dynamics, two types of stream function (or streamfunction) are defined: The two-dimensional (or Lagrange) stream function, introduced by Joseph Louis Lagrange
Stream_function
Branch of mathematics studying functions of a complex variable
traditionally known as the theory of functions of a complex variable, is the branch of mathematical analysis that investigates functions of a complex variable of
Complex_analysis
Mathematical entity to describe the probability of each possible measurement on a system
the wave functions describing position and momentum, finite-dimensional vectors describing spin such as the singlet, and states describing many-body
Quantum_state
Sequence of program instructions invokable by other software
In computer programming, a function (also procedure, method, subroutine, routine, or subprogram) is a callable unit of software logic that has a well-formed
Function (computer programming)
Function_(computer_programming)
Mathematical concept in measure theory
measure theory, an approximately continuous function is a concept that generalizes the notion of continuous functions by replacing the ordinary limit with an
Approximately continuous function
Approximately_continuous_function
functions (PDFs), the hard scattering part, and fragmentation functions. The fragmentation functions, as are the PDFs, are non-perturbative functions
Fragmentation_function
Mathematical function describing fluid motion
In applied mathematics, the Hough functions are the eigenfunctions of Laplace's tidal equations which govern fluid motion on a rotating sphere. As such
Hough_function
Computer science concept
into functions expecting either signed or unsigned chars, because it is compatible with both types. Intersection types are useful for describing overloaded
Type_system
Mathematical model describing how an output of a function is computed given an input
computation is a model that describes how an output of a mathematical function is computed given an input. A model of computation describes how units of computations
Model_of_computation
algebra and in particular in algebraic combinatorics, the ring of symmetric functions is a specific limit of the rings of symmetric polynomials in n indeterminates
Ring_of_symmetric_functions
Polynomial function of degree two
In mathematics, a quadratic function of a single variable is a function of the form f ( x ) = a x 2 + b x + c , a ≠ 0 , {\displaystyle f(x)=ax^{2}+bx+c
Quadratic_function
Special function in the physical sciences
mathematics, the Airy function (or Airy function of the first kind) A i ( x ) {\displaystyle \mathbf {Ai({\boldsymbol {x}})} } is a special function named after
Airy_function
Probability of survival beyond any specified time
a continuous random variable describing the time to failure. If T {\displaystyle T} has cumulative distribution function F ( t ) {\displaystyle F(t)}
Survival_function
Function related to statistics and probability theory
A likelihood function (often simply called the likelihood) measures how well a statistical model explains observed data by calculating the probability
Likelihood_function
Graphical depicture of loss
breakthrough in describing quality, and helped fuel the continuous improvement movement. The concept of Taguchi's quality loss function was in contrast
Taguchi_loss_function
Hash functions intended for applications that do not need rigorous security
The non-cryptographic hash functions (NCHFs) are hash functions intended for applications that do not need the rigorous security requirements of the cryptographic
Non-cryptographic hash function
Non-cryptographic_hash_function
Hash function that is suitable for use in cryptography
Whirlpool is a cryptographic hash function designed by Vincent Rijmen and Paulo S. L. M. Barreto, who first described it in 2000. Whirlpool is based on
Cryptographic_hash_function
Equations describing elastic deformation
In linear elasticity, the equations describing the deformation of an elastic body subject only to surface forces (or body forces that could be expressed
Stress_functions
Interrelated entities that form a whole
influenced by its environment, is described by its boundaries, structure and purpose and is expressed in its functioning. Systems are the subjects of study
System
Point to which functions converge in analysis
mathematics, the limit of a function is a fundamental concept in calculus and analysis concerning the behavior of that function near a particular input which
Limit_of_a_function
Fundamental trigonometric functions
In mathematics, sine and cosine are trigonometric functions of an angle. The sine and cosine of an acute angle are defined in the context of a right triangle:
Sine_and_cosine
Hash function without any collisions
In computer science, a perfect hash function h for a set S is a hash function that maps distinct elements in S to a set of m integers, with no collisions
Perfect_hash_function
Function in thermodynamics and statistical physics
partition function describes the statistical properties of a system in thermodynamic equilibrium.[citation needed] Partition functions are functions of the
Partition function (statistical mechanics)
Partition_function_(statistical_mechanics)
Function defined by a hypergeometric series
hypergeometric function 2F1(a, b; c; z) is a special function represented by the hypergeometric series, that includes many other special functions as specific
Hypergeometric_function
Type of function
In mathematics, a real-valued function f on the interval [a, b] is said to be singular if it has the following properties: f is continuous on [a, b]. (**)
Singular_function
Type of energy
In solid-state physics, the work function (sometimes spelled workfunction) is the minimum thermodynamic work (i.e., energy) needed to remove an electron
Work_function
Mathematical function for the probability a given outcome occurs in an experiment
distributions are often described by functions such as cumulative distribution functions, probability mass functions, or probability density functions. Which description
Probability_distribution
Concept in dynamical systems
study of dynamical systems the term Feigenbaum function has been used to describe two different functions introduced by the physicist Mitchell Feigenbaum:
Feigenbaum_function
Function of propagation delay and Doppler frequency
definitions of the ambiguity function exist; some are restricted to narrowband signals and others are suitable to describe the delay and Doppler relationship
Ambiguity_function
Characteristic of an optical system
shift in the periodic pattern. The optical transfer function is used by optical engineers to describe how the optics project light from the object or scene
Optical_transfer_function
Distance from origin of tangent hyperplanes
In mathematics, the support function hA of a non-empty closed convex set A in R n {\displaystyle \mathbb {R} ^{n}} describes the (signed) distances of supporting
Support_function
Cryptographic hash function
Bruce Schneier, the Skein Hash Function". Slashdot. 2008-10-31. Retrieved 2008-10-31. "Paper describing the hash function, Version 1.3 (2010-10-01)" (PDF)
Skein_(hash_function)
Cybernetics. 7 (7): 567–568. doi:10.1109/TSMC.1977.4309773. "Counterexamples to Aizerman's and Kalman's conjectures and describing function method" (PDF).
Aizerman's_conjecture
Field of medical research
Gain-of-function research (GoF research or GoFR) is medical research that genetically alters an organism in a way that may enhance the biological functions of
Gain-of-function_research
Development phases of a computer-based system
information such as describing the major components of the system. The plan can include relatively low-level information such as describing functions, screen layout
Systems development life cycle
Systems_development_life_cycle
Expression in propositional calculus
In propositional calculus, a propositional function or a predicate is a sentence expressed in a way that would assume the value of true or false, except
Propositional_function
Electronic test equipment used to generate electrical waveforms
on many function generators is the ability to add a DC offset. Integrated circuits used to generate waveforms may also be described as function generator
Function_generator
Type of function in complex analysis
mathematics, plurisubharmonic functions (sometimes abbreviated as psh, plsh, or plush functions) form an important class of functions used in complex analysis
Plurisubharmonic_function
In number theory, the unit function is a completely multiplicative function on the positive integers defined as: ε ( n ) = { 1 , if n = 1 0 , if n ≠
Unit_function
Sexual health concept
aspects of sexual function are described on the basis of a modified version of Masters and Johnson's work. The aspects of sexual function determined as being
Sexual_function
Type of functions, in mathematical analysis
holonomic function is an element of a holonomic module of smooth functions. Holonomic functions can also be described as differentiably finite functions, also
Holonomic_function
Function in computational chemistry
In computational chemistry, the Fukui function or frontier function is a function that describes the electron density in a frontier orbital, as a result
Fukui_function
Functions in mathematics
the theory of stochastic processes, a harmonic function is a twice continuously differentiable function f : U → R {\displaystyle f:U\to \mathbb {R} }
Harmonic_function
Set of basis functions
Anderson functions describe the projection of a magnetic dipole field in a given direction at points along an arbitrary line. They are useful in the study
Anderson_function
Mathematical function describing predator consumption of prey
predator–prey interaction firstly described by Volterra and Lotka in the Lotka–Volterra equation. A trophic function represents the consumption of prey
Trophic_function
DESCRIBING FUNCTION
DESCRIBING FUNCTION
Male
Egyptian
, a high Egyptian functionary.
Boy/Male
Arabic, Muslim
Describing
Surname or Lastname
English
English : nickname from the animal, Middle English catte ‘cat’. The word is found in similar forms in most European languages from very early times (e.g. Gaelic cath, Slavic kotu). Domestic cats were unknown in Europe in classical times, when weasels fulfilled many of their functions, for example in hunting rodents. They seem to have come from Egypt, where they were regarded as sacred animals.English : from a medieval female personal name, a short form of Catherine.Variant spelling of German and Dutch Katt.
Male
Egyptian
, the son of the functionary Heknofre.
Surname or Lastname
English
English : occupational name for a dresser of cloth, Old English fullere (from Latin fullo, with the addition of the English agent suffix). The Middle English successor of this word had also been reinforced by Old French fouleor, foleur, of similar origin. The work of the fuller was to scour and thicken the raw cloth by beating and trampling it in water. This surname is found mostly in southeast England and East Anglia. See also Tucker and Walker.In a few cases the name may be of German origin with the same form and meaning as 1 (from Latin fullare).Americanized version of French Fournier.Samuel Fuller (1589–1633), born in Redenhall, Norfolk, England, was among the Pilgrim Fathers who sailed on the Mayflower in 1620. He was a deacon of the church and until his death functioned as Plymouth Colony’s physician.
Male
Egyptian
, an Egyptian functionary.
Surname or Lastname
English (chiefly Kent and Sussex)
English (chiefly Kent and Sussex) : occupational name for a designer or engineer, from a Middle English reduced form of Old French engineor ‘contriver’ (a derivative of engaigne ‘cunning’, ‘ingenuity’, ‘stratagem’, ‘device’). Engineers in the Middle Ages were primarily designers and builders of military machines, although in peacetime they might turn their hands to architecture and other more pacific functions.German : from the Latin personal name Januarius (see January 1). Jänner is a South German word for ‘January’, and so it is possible that this is one of the surnames acquired from words denoting months of the year, for example by converts who had been baptized in that month, people who were born or baptized in that month, or people whose taxes were due in January.
Surname or Lastname
English
English : from the personal name Perceval, first found as the name of the hero of an epic poem by the 12th-century French poet Crestien de Troyes, describing the quest for the holy grail. The origin of the name is uncertain; it may be associated with the Gaulish personal name Pritorīx or it may be an alteration of the Celtic name Peredur (see Priddy). It seems to have been altered as the result of folk etymological association with Old French perce(r) ‘to pierce or breach’ + val ‘valley’.English : Norman habitational name from either of the two places in Calvados named Perceval.
Surname or Lastname
English
English : topographic name for someone who lived by the gates of a medieval walled town. The Middle English singular gate is from the Old English plural, gatu, of geat ‘gate’ (see Yates). Since medieval gates were normally arranged in pairs, fastened in the center, the Old English plural came to function as a singular, and a new Middle English plural ending in -s was formed. In some cases the name may refer specifically to the Sussex place Eastergate (i.e. ‘eastern gate’), known also as Gates in the 13th and 14th centuries, when surnames were being acquired.Americanized spelling of German Götz (see Goetz).Translated form of French Barrière (see Barriere).In New England, Gates was the preferred English version of the name of an extensive French family, called Barrière dit Langevin.
Male
Celtic
, great justiciary, or functionary.
Boy/Male
Buddhist, Indian, Japanese
Mysterious Function
Biblical
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Girl/Female
Arabic, Muslim
Describing
Male
Egyptian
, a great functionary.
Male
Egyptian
, an Egyptian functionary.
Surname or Lastname
English and North German
English and North German : occupational name for a maker of pins or pegs (or alternatively, in the case of the German name, a metonymic occupational name for a shoemaker), a derivative of Pinn, with the addition of the agent suffix -er.English : occupational name for a maker or user of combs, Anglo-Norman French peigner, an agent derivative of peigne ‘comb’.English : habitational name from Pinner, now part of northwest London, which derives its name from Old English pinn ‘pin’, ‘peg’ + Åra ‘slope’, ‘ridge’, describing a projecting hill spur.Jewish (Ashkenazic) : habitational name for someone from Pinne (Polish Pniewy) near PoznaÅ„.German : habitational name for someone from a place called Pinnan or Pinne.
Male
Egyptian
, Functionary of the Interior.
DESCRIBING FUNCTION
DESCRIBING FUNCTION
Boy/Male
Australian, Finnish
Permanent
Girl/Female
Muslim/Islamic
Prouded like a moon
Boy/Male
Hindu, Indian
Eyes of Lord Shiva
Girl/Female
Hindu
One of the indian Raaga taal
Girl/Female
Tamil
Naishadha | நைஷாதா
King Nala, A hero from the mahabharata who was king of nishadha, A open
Girl/Female
Hindu
Boy/Male
Tamil
Kalaparan | கலாபரண
Male
Hebrew
(גָּד) Hebrew name GAD means "troop." In the bible, this is the name of a prophet and the seventh son of Jacob by Zilpah. Compare with other forms of Gad.
Boy/Male
American, Australian, French, German, Greek, Latin, Swedish
Light; Illumination; From Lucanus; A Region of Southern Italy; Form of Luke; Bringer of Light
Girl/Female
Tamil
Drisana | தà¯à®°à®¿à®¸à®¨à®¾
(Daughter of the Sun)
DESCRIBING FUNCTION
DESCRIBING FUNCTION
DESCRIBING FUNCTION
DESCRIBING FUNCTION
DESCRIBING FUNCTION
p. pr. & vb. n.
of Descry
n.
The science of describing plants in a systematic manner; also, a description of plants.
p. pr. & vb. n.
of Ascribe
v. t.
To exceed in naming or describing.
a.
Belonging to, or consisting of, allegory; of the nature of an allegory; describing by resemblances; figurative.
n.
An instrument for dividing lines, describing circles, etc., compasses. See Compasses.
a.
Of or pertaining to ichonography; describing a ground plot.
n.
Same as Generatrix.
p. pr. & vb. n.
of Inscribe
n.
The act of describing; a delineation by marks or signs.
n.
The art of measuring and describing the sea, lakes, rivers, and other waters, with their phenomena.
n.
The art or act of describing or depicting heraldic bearings in the proper language or manner.
n.
The act or practice of prescribing too many medicines.
p. pr & vb. n.
of Prescribe
n.
The act or process of inscribing.
p. pr. & vb. n.
of Scribe
p. pr. & vb. n.
of Describe
n.
The art of writing or inscribing characters on pillars.
n.
An instrument for describing ellipses; -- called also trammel.
n.
The art of describing or delineating the stars; a description or mapping of the heavens.