Results 11 to 20 of about 5,274,554 (287)
A stabilized algorithm for multi-dimensional numerical differentiation
Journal of Algorithms & Computational Technology, 2016 We develop a multi-dimensional numerical differentiation method in this paper. To obtain stable numerical derivatives, the Tikhonov regularization method in Hilbert scales is proposed to deal with illposedness of the problem. The penalty term in Tikhonov
Zhenyu Zhao +4 more
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Minimal numerical differentiation formulas [PDF]
Numerische Mathematik, 2018 We investigate numerical differentiation formulas on irregular centers in two or more variables that are exact for polynomials of a given order and minimize an absolute seminorm of the weight vector. Error bounds are given in terms of a growth function that carries the information about the geometry of the centers.
Davydov, Oleg, Schaback, Robert
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Numerical differentiation on scattered data through multivariate polynomial interpolation [PDF]
BIT Numerical Mathematics, 2021 We discuss a pointwise numerical differentiation formula on multivariate scattered data, based on the coefficients of local polynomial interpolation at Discrete Leja Points, written in Taylor’s formula monomial basis.
F. Dell’Accio +3 more
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International Journal of Systems Science, 2022 The historical developments, parametrization, and numerous applications of algebraic numerical differentiation methods initiated by Fliess, Mboup, Join, and Sira-Ramírez are presented.
A. Othmane, Lothar Kiltz, J. Rudolph
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A new regularization approach for numerical differentiation [PDF]
Inverse Problems in Science and Engineering, 2019 It is well known that the problem of numerical differentiation is an ill-posed problem and one requires regularization methods to approximate the solution.
Abinash Nayak
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IEEE Access, 2020 This contribution proposes an efficient methodology in time domain (TD) based on companion-circuit analysis (CCA) and a Newton method of extrapolation to the Limit Cycle (periodic steady state solution) based on a Numerical Differentiation (ND) process ...
Julio Cesar Godinez-Delgado +2 more
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Mathematical Modelling and Analysis, 2005 The practical realization of the morphologic analysis of radar subsurface as the processing of input digital data is presented here together with real data processing results. The analysis depends on a new numerical differentiation algorithm in frequency
A. Grakovski, A. Alexandrov
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Data smoothing with applications to edge detection
Open Mathematics, 2022 The aim of this paper is to present a new stable method for smoothing and differentiating noisy data defined on a bounded domain Ω⊂RN\Omega \subset {{\mathbb{R}}}^{N} with N≥1N\ge 1.
Al-Jamal Mohammad F. +2 more
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Managing temporary workers in higher education: still at the margin? [PDF]
, 2006 Purpose – To evaluate whether “numerical flexibility” – specifically a form of temporary and precarious employment – hourly-paid part-time teaching in the UK higher education sector – adds strategic value and demonstrates good practice.
Colin Bryson +2 more
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A Two-Stage Method for Parameter Identification of a Nonlinear System in a Microbial Batch Process
Applied Sciences, 2019 This paper deals with the parameter identification of a microbial batch process of glycerol to 1,3-propanediol (1,3-PD). We first present a parameter identification model for the excess kinetics of a microbial batch process of glycerol to 1,3-PD.
Gongxian Xu, Dongxue Lv, Wenxin Tan
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