# parameter

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## parameter

1. one of a number of auxiliary variables in terms of which all the variables in an implicit functional relationship can be explicitly expressed
2. a variable whose behaviour is not being considered and which may for present purposes be regarded as a constant, as y in the partial derivative ∂f(x,y)/∂x

## Parameter

a variable whose values are used to distinguish elements of a given set. For example, the equation (x — a)2 + (y — b)2 = 1 in rectangular Cartesian coordinates determines the set of all circles of radius 1 in the xOy plane. By setting a = 3 and b = 4, we isolate in this set the completely defined circle with center at (3, 4). Thus, a and b are the parameters of a circle in the set.

## Parameter

in engineering, a quantity that characterizes a certain aspect of a process, phenomenon, system, or device. Examples of such quantities in mechanical systems are mass, coefficient of friction, moment of inertia, and tension. Such parameters as heat capacity, heat flow, and thermal head are used for thermal processes. Typical electrical parameters are resistance, inductance, and capacitance. The physical processes that occur in a system are describable by equations giving the relation between the variable quantities of the processes. Parameters are usually the coefficients of the equations. They can be constants, or they can be variables dependent on time or the system’s coordinates.

The parameters of a system or device can be lumped or they can be distributed in space relative to one, two, or three coordinates. A typical example of a system with distributed parameters is an electric power transmission line, in which the inductance, capacitance, and resistance (conductance) are distributed along the entire length of the line. An example of a lumped parameter is the load on a small segment of a much longer beam.

M. M. MAIZEL

## parameter

[pə′ram·əd·ər]
(crystallography)
Any of the axial lengths or interaxial angles that define a unit cell.
(electricity)
The resistance, capacitance, inductance, or impedance of a circuit element.
The value of a transistor or tube characteristic.
(mathematics)
An arbitrary constant or variable so appearing in a mathematical expression that changing it gives various cases of the phenomenon represented.
(physics)
A quantity which is constant under a given set of conditions, but may be different under other conditions.

## parameter

(1) Any value passed to a program by the user or by another program in order to configure the program for a particular purpose. A parameter may be anything; for example, a file name, a coordinate, a range of values, a money amount or a code of some kind. Parameters may be required as in parameter-driven software (see below) or they may be optional. Parameters are often entered as a series of values following the program name when the program is loaded; for example, a DOS switch defines a parameter. In the command dir /p the /p is a parameter switch that means pause after every screenful.

(2) In programming, a value passed to a subroutine or function for processing. Programming today's graphical applications in languages such as C, C++ and Java requires knowledge of hundreds of parameters.

In the following C function, which creates the text window for the Windows version of this database, there are 11 parameters passed to the CreateWindow routine. Some of them call yet other functions for necessary information. In order to call this routine in a program, the programmer must determine the values for every parameter.

``` hWndText = CreateWindow
(
"TextWClass",
NULL,
WS_CHILD|WS_BORDER|WS_VSCROLL|WS_TABSTOP,
xChar*23+GetSystemMetrics(SM_CXVSCROLL)+8,
yChar*4,
Rect.right-Rect.left+1-xChar*23
-2*GetSystemMetrics(SM_CXVSCROLL)+5,
yChar*(Lines+1)+2,
hWnd,
IDC_TEXTLIST,
(HANDLE)hInstance,
NULL
);
```
References in periodicals archive ?
In January 2019, Swiss Re launched FLOW, a parametric water-level insurance product designed to protect companies from the financial impact of high or low river water levels.
2) Blockchain technology can greatly enhance the robustness, security and transparency of parametric programmes.
Zhang, "Dual-RbTiOPO4 optical parametric oscillator producing orthogonally polarized 1.6-[micro]m laser," IEEE Photonics Technology Letters, vol.
"The data is out there to build parametric products," Stander said.
Then eight parametric stability parameters were performed inaccordance with Eberhart and Russel's (1966) the regression coefficient (bi) and deviation from regression (Eq.), Pinthus's (1973) coefficients of determination (R2), Wricks's (1962) ecovalance (Eq.), Shukla's (1972) stability variance (Eq.), Francis and Kannenberg's (1978) coefficient of variability (CVi) and genotypic variance (Eq.); Lin and Binn's (1988) superiority index (Pi) which the genotypes of greatest interest would be those with the lowest Pi values.
We denote the parametric interval-valued trapezoidal fuzzy variable [??] with the above distribution by [[r.sub.1], [r.sub.2], [r.sub.3], [r.sub.4], [[theta].sub.l], [[theta].sub.r].
The frequency-response equation of the principal parametric resonance can be obtained by combining the equations of (30) when a' = 0, [phi]' = 0:
Given the faster process and speed of payouts under parametric insurance, an NGO with a parametric insurance cover could expect to receive funding quickly after a natural catastrophe to allow it to intervene and provide aid rapidly.
Investors can select from Parametric's factor portfolios that seek to maintain a systematic bias toward certain factors, such as dividend yield, value, quality, momentum, low volatility, profitability and size.
Test Scheme Design of Parametric Vibration of Stay Cable under Support Excitation
Keywords: Censored data; Empirical likelihood; Parametric estimation; Nonparametric estimation; Approximation of variance.
Non-parametric statistical methods differ from the traditional parametric approach in requiring fewer and broader initial assumptions about the underlying populations.

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