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Impact of Commutation Failure Preventions on HVDC System Based on a Multi-Index Value Set Approach

open access: yesIEEE Access, 2021
This paper proposes a systematic method, based on rational approximation and value set approach, to unravel the impact of commutation failure preventions (CFPREVs) on HVDC system dynamics.
Minquan Chen   +3 more
doaj   +1 more source

Rational Approximations of Arbitrary Order: A Survey

open access: yesFractal and Fractional, 2021
This paper deals with the study and analysis of several rational approximations to approach the behavior of arbitrary-order differentiators and integrators in the frequency domain.
José Daniel Colín-Cervantes   +6 more
doaj   +1 more source

The Stability Analysis of Linear Systems with Cauchy—Polynomial-Vandermonde Matrices

open access: yesAxioms, 2023
The numerical approximation of both eigenvalues and singular values corresponding to a class of totally positive Bernstein–Vandermonde matrices, Bernstein–Bezoutian structured matrices, Cauchy—polynomial-Vandermonde structured matrices, and quasi ...
Mutti-Ur Rehman   +3 more
doaj   +1 more source

On a New Generalization of Bernstein-Type Rational Functions and Its Approximation

open access: yesMathematics, 2022
In this study, we introduce a new generalization of a Bernstein-type rational function possessing better estimates than the classical Bernstein-type rational function.
Esma Yıldız Özkan, Gözde Aksoy
doaj   +1 more source

Macromodeling High-Speed Circuit Data Using Rational Krylov Fitting Method

open access: yesEnergies, 2021
This paper presents the modeling of high speed distributed networks characterized by S-parameters frequency data using the rational Krylov fitting (RKFIT) algorithm. Numerical examples illustrate the effectiveness of the method to compute stable rational
Mohamed Sahouli, Anestis Dounavis
doaj   +1 more source

Parabolic convergence regions of branched continued fractions of the special form

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2021
Using the criterion of convergence of branched continued fractions of the special form with positive elements, effective sufficient criteria of convergence for these fractions are established.
D.I. Bodnar, I.B. Bilanyk
doaj   +1 more source

On one rational integral operator of Fourier – Chebyshev type and approximation of Markov functions

open access: yesЖурнал Белорусского государственного университета: Математика, информатика, 2020
The purpose of this paper is to construct an integral rational Fourier operator based on the system of Chebyshev – Markov rational functions and to study its approximation properties on classes of Markov functions. In the introduction the main results of
Pavel G. Patseika   +2 more
doaj   +1 more source

A New Kantorovich-Type Rational Operator and Inequalities for Its Approximation

open access: yesMathematics, 2022
We introduce a new Kantorovich-type rational operator. We investigate inequalities estimating its rates of convergence in view of the modulus of continuity and the Lipschitz-type functions.
Esma Yıldız Özkan
doaj   +1 more source

Parameter identification method of time-domain stable discrete rational approximation for frequency response of foundations

open access: yesYantu gongcheng xuebao, 2021
The discrete-time rational approximation function is one of the important methods for establishing dynamic analysis model for foundations. The stability and accuracy of the rational function determine those of dynamic time history analysis.
WANG Zhi-yu 1, TANG Zhen-yun 1, 2, DU Xiu-li 1
doaj   +1 more source

Rate of interpolation of analytic functions with regularly decreasing coefficients by simple partial fractions [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2023
We consider the problems of multiple interpolation of analytic functions $f(z)=f_0+f_1z+\dots$ in the unit disk with node $z=0$ by means of simple partial fractions (logarithmic derivatives of algebraic polynomials) with free poles and with all poles on ...
Komarov, Mikhail Anatol'evich
doaj   +1 more source

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