Results 11 to 20 of about 44,196 (310)

Polynomial approximation of symmetric functions

open access: yesMathematics of Computation, 2023
We study the polynomial approximation of symmetric multivariate functions and of multi-set functions. Specifically, we consider f (
Markus Bachmayr   +3 more
openaire   +4 more sources

Probabilistic small-signal stability analysis of power systems based on Hermite polynomial approximation

open access: yesSN Applied Sciences, 2021
This paper proposes a probabilistic small-signal stability analysis method based on the polynomial approximation approach. Since the correct determination of unknown coefficients has a direct effect on the accuracy of the polynomial approximation method,
Ali Mohammad Tabrizchi   +1 more
doaj   +1 more source

On the Expediency and Possibilities of Approximating a Pure Delay Link

open access: yesИнформатика и автоматизация, 2022
When solving problems of controlling an object with delay, it is often necessary to approximate a pure delay link with a minimum phase link in order to ensure the possibility of using analytical methods for regulator design.
Vadim Zhmud   +5 more
doaj   +1 more source

Improved Stability Criteria for Time-Varying Delay System Using Second and First Order Polynomials

open access: yesIEEE Access, 2020
This article concerns the problem of stability analysis of systems with time-varying delay. Recent developments in this direction involves approximation of a second order polynomial function of time-delay.
Sharat Chandra Mahto   +5 more
doaj   +1 more source

Application of the Minimalization of Maximal Error Method in Transformation by Polynomial Approximation

open access: yesCommunications, 2000
The least square method is generally used for an estimation of the coefficients of polynomial transformation. The paper describes the rationalization of polynomial approximation by the minimization of maximal error model (Chebyshew approximation).
Robert Tenzer
doaj   +1 more source

Approximate zolotarev polynomials

open access: yesComputers & Mathematics with Applications, 1986
The authors introduce modified Zolotarev polynomials as follows. For \(a\in R\), (1) \(Z_ a:=Z_{a,m+2}:=aT_{m+2}+T_{m+1}+q^*,\) where \(q^*\in P_ m\) is the (uniquely determined) algebraic polynomial of degree \(\leq m\) which minimizes \(\| Z_{a,m+2}\|_{\infty}=\max_{-1\leq x\leq 1}| Z_{a,m+2}(x)|;\) and \(T_ p\) is a Chebyshev polynomial of first ...
Haussmann, W., Zeller, K.
openaire   +2 more sources

Minimax polynomial approximation [PDF]

open access: yesMathematics of Computation, 1966
Some new methods for obtaining the minimax polynomial approximation of degree n n to a continuous function are introduced ...
openaire   +1 more source

Deterministic and random approximation by the combination of algebraic polynomials and trigonometric polynomials

open access: yesOpen Mathematics, 2021
Fourier approximation plays a key role in qualitative theory of deterministic and random differential equations. In this paper, we will develop a new approximation tool.
Zhang Zhihua
doaj   +1 more source

Square-rich fixed point polynomial evaluation on FPGAs [PDF]

open access: yes, 2014
Polynomial evaluation is important across a wide range of application domains, so significant work has been done on accelerating its computation. The conventional algorithm, referred to as Horner's rule, involves the least number of steps but can lead to
McLoughlin, Ian V.   +5 more
core   +1 more source

Numerical integration by the matrix method of boundary value problems for linear inhomogeneous ordinary differential equations of the third order with variable coefficients

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2018
The use of the Taylor polynomial of the second degree when approximating the derivatives by finite differences leads to the second order of approximation of the traditional method of nets in the numerical integration of second-order ordinary differential
Vladimir N Maklakov, Yanina G Stelmakh
doaj   +1 more source

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