parameter
nounUK /pəˈɹæm.ɪ.tə/ · US /pəˈɹæm.ə.tɚ/
Etymology From French paramètre, from New Latin parametrum (“parameter”), from Ancient Greek παρα- (para-, “beside”) + μέτρον (métron, “measure”).
11 senses
- 1A value kept constant during an experiment, equation…
- 2A variable that describes a property or characteristic…
- 3Any measured quantity of a statistical population that…
- 4A variable of a model that is trained by a machine…
- 5An input variable of a function definition, that gets an…
- 6An actual value given to such a formal parameter.
- 7A characteristic or feature that distinguishes something…
- 8In the ellipse and hyperbola, a third proportional to…
- 9Clipping of uniformizing parameter.
- 10The ratio of the three crystallographic axes which…
- 11The fundamental axial ratio for a given species.
A value kept constant during an experiment, equation, calculation, or similar, but varied over other versions of the experiment, equation, calculation, etc.
- As molecular surface-to-surface contacts control both solution phenomena and surface phenomena, it is not surprising that various correlations of cohesion parameters and surface phenomena can be found.2007, Charles M. Hansen, Hansen Solubility Parameters, →ISBN:
- The independent parameters of a system or network over F(z) reflect its structure and determine its structural properties (such as the reducibility of coefficient matrix A and its characteristic polynomial det(λI −A), controllability and observability over F(z), etc.).2012, Kai-Sheng Lu, Rational Function Systems and Electrical Networks with Multi-Parameters, →ISBN:
1 more example
- On the other hand, if we have suitable data, we may be able to develop some direct computational methods for the essentially nonlinear parameter identification problems, in which fewer or even no nonlinear processes are involved.2014, M. Amouroux, A. El Jai, Control of Distributed Parameter Systems 1989, →ISBN:
Sciences A variable that describes a property or characteristic of some system (material, object, event, etc.) or some aspect thereof.
- Cohesion parameters (solubility parameters) can be used with full theoretical justification to characterize many surfaces ...2007, Charles M. Hansen, Hansen Solubility Parameters: A User's Handbook, Second Edition, CRC Press, →ISBN, page 113:
- To this end, we derive an a posteriori error estimator for the error with respect to the unknown parameter.2012, Wolfgang Desch, Franz Kappel, Karl Kunisch, Control and Estimation of Distributed Parameter Systems: International Conference in Maria Trost (Austria), July 15–21, 2001, Birkhäuser, →ISBN, page 41:
Mathematics, Sciences, Statistics Any measured quantity of a statistical population that summarises or describes an aspect of the population.
Sciences A variable of a model that is trained by a machine learning algorithm.
Machine learning
- The parameter estimation problem considered in this chapter consists of estimating the unknown parameter, ū [a barred v, actually], given N samples of the observation process.2012, Michael Lemmon, Competitively Inhibited Neural Networks for Adaptive Parameter Estimation, Springer Science & Business Media, →ISBN, page 74:
- Fundamental is the regulation of a for-profit OpenAI. The company initially delayed the launch of its earlier GPT-2, with a mere 1.5bn parameters, because the company fretted over its implications.2020 August 11, “The Guardian view on artificial intelligence's revolution: learning but not as we know it”, in The Guardian:
Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Programming, Sciences An input variable of a function definition, that gets an actual value (argument) at execution time.
Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Programming, Sciences Broadly An actual value given to such a formal parameter.
A characteristic or feature that distinguishes something from others.
Geometry, Mathematics, Sciences In the ellipse and hyperbola, a third proportional to any diameter and its conjugate, or in the parabola, to any abscissa and the corresponding ordinate.
- The parameter of the principal axis of a conic section is called the latus rectum.
Abbreviation, Clipping Clipping of uniformizing parameter.
Commutative algebra
Chemistry, Crystallography, Natural sciences, Physical sciences The ratio of the three crystallographic axes which determines the position of any plane.
Chemistry, Crystallography, Natural sciences, Physical sciences The fundamental axial ratio for a given species.
- Derived terms
28 terms
actual parameter, clinicoparameter, Coriolis parameter, formal parameter, Hapke parameter, Hildebrand solubility parameter, hyperparameter, lattice parameter, macroparameter, metaparameter, microparameter, multiparameter, named parameter, nuisance parameter, parameterisation, parameterise, parameterization, parameterize, parameterless, parametrization, positional parameter, rest parameter, Sommerfeld parameter, speed parameter, subparameter, superparameter, time parameter, uniparameter- Related terms
- parametric, parametrise, parametrize, variable