Non-Integer Order Approximation of a PID-Type Controller for Boost Converters
Energies, 2021 In this work, the voltage regulation of a boost converter is addressed. A non-integer order PID controller is proposed to deal with the closed-loop instability of the system.
Allan G. S. Sánchez +3 more
doaj +1 more source
Order of Approximation by a New Univariate Kantorovich Type Operator
International Journal of Analysis and Applications, 2023 In order to approximate Lebesgue integrable functions on [0, 1], a sequence of linear positive integral operators of Kantorovich type Lσf (x) with a parameter sσ is introduced.
Asha Ram Gairola +4 more
doaj +1 more source
The Chebyshev Set Problem in Riesz Space
Journal of Function Spaces, 2022 In this paper, we mainly study the best approximation theory in Riesz space, which is not constructed by the norm, but only rely on the order structure.
Shengwei Wu +4 more
doaj +1 more source
Stability, instability, and error of the force-based quasicontinuum approximation [PDF]
, 2009 Due to their algorithmic simplicity and high accuracy, force-based model coupling techniques are popular tools in computational physics. For example, the force-based quasicontinuum (QCF) approximation is the only known pointwise consistent quasicontinuum
Luskin, Mitchell Barry +5 more
core +1 more source
ON THE ORDER OF METRIC APPROXIMATION OF MAXIMAL LINKED SYSTEMS AND CAPACITARIAN DIMENSIONS
Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2019 It is shown that in any metric compact space X there exists a countable closed subset F whose upper capacitarian dimension dimBF is equal to any preassigned non-negative number not exceeding the upper capacitarian dimension of X.
Alexander Ivanov, Ol’ga Fomkina
doaj +1 more source
Numerical Approximation of Fractional-Order Volterra Integrodifferential Equation
Journal of Function Spaces, 2020 Laplace transform is a powerful tool for solving differential and integrodifferential equations in engineering sciences. The use of Laplace transform for the solution of differential or integrodifferential equations sometimes leads to the solutions in ...
Xiaoli Qiang +3 more
doaj +1 more source
Discontinuous Galerkin Finite Element Approximation of Nonlinear Second-Order Elliptic and Hyperbolic Systems [PDF]
, 2006 We develop the convergence analysis of discontinuous Galerkin finite element approximations to second-order quasilinear elliptic and hyperbolic systems of partial differential equations of the form, respectively, $-\sum_{\alpha=1}^d \partial_{x_\alpha ...
Suli, Endre +5 more
core +1 more source
A High-order Coupled Compact Integrated RBF Approximation Based Domain Decomposition Algorithm for Second-order Differential Problems [PDF]
, 2015 This paper presents a high-order coupled compact integrated RBF (CC IRBF) approximation based domain decomposition (DD) algorithm for the discretisation of second-order differential problems.
Tien, C. M. T. +9 more
core +1 more source
Estimations for the convex modular of the aliasing error of nonlinear sampling Kantorovich operators
Nonlinear AnalysisIn this paper, we establish quantitative estimates for the nonlinear sampling Kantorovich operators in the general setting of modular spaces Lρ. To achieve this, we consider a notion of modulus of smoothness based on the convex modular functional ρ ...
Danilo Costarelli +2 more
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider +15 more
wiley +1 more source