Results 21 to 30 of about 8,448 (266)

Quasi Interpolation of radial basis functions-pseudospectral method for solving nonlinear Klein–Gordon and sine-Gordon equations [PDF]

Iranian Journal of Numerical Analysis and Optimization, 2020
We propose a new approach for solving nonlinear Klein–Gordon and sine-Gordon equations based on radial basis function-pseudospectralmethod (RBF-PS). The proposed numerical method is based on quasiinterpolation of radial basis function differentiation ...
M. Emamjomeh, S. Abbasbandy, D. Rostamy
doaj   +1 more source

Weierstrass quasi-interpolants

Journal of Approximation Theory, 2014
The expression of Weierstrass operators as differential operators on polynomials is used for the construction of associated quasi-interpolants. Also the convergence estimates of these operators are studied.
openaire   +3 more sources

Quasi-Interpolation on Chebyshev Grids with Boundary Corrections

Computation
Quasi-interpolation is a powerful tool for approximating functions using radial basis functions (RBFs) such as Gaussian kernels. This avoids solving large systems of equations as in RBF interpolation. However, quasi-interpolation with Gaussian kernels on
Faisal Alsharif
doaj   +1 more source

Quasi-interpolation in the Fourier algebra

Journal of Approximation Theory, 2007
In this paper, the most interesting topic of quasi-interpolation by the so-called Schoenberg operator is studied. This is an important operator especially in univariate and multivariate spline theory, as well as in, for example, the theory of radial basis functions. Here, the convergence of these operators in certain algebras is studied.
Hans Georg Feichtinger, Norbert Kaiblinger   +1 more
openaire   +3 more sources

Interpolative Kannan Contractions in T0-Quasi-Metric Spaces

Journal of Mathematics, 2021
In this paper, we update the well-known fixed point theorem of Kannan using the interpolation notion in the realm of quasi-metric spaces. We consider some asymmetric versions. We also present some illustrative examples in support of the obtained results.
Yaé Ulrich Gaba, Maggie Aphane, Hassen Aydi   +2 more
doaj   +1 more source

Quasi-Interpolation by Means of Filter-Banks [PDF]

IEEE Transactions on Signal Processing, 2010
We consider the problem of approximating a regular function f(t) from its samples, f(nT), taken in a uniform grid. Quasi-interpolation schemes approximate f(t) with a dilated version of a linear combination of shifted versions of a kernel ??(t), specifically fapprox T(t) = ??af[n]??(t/T - n), in a way that the polynomials of degree at most L-1 are ...
openaire   +2 more sources

Quasi-interpolation projectors for subdivision function spaces

Graphical Models
Subdivision surfaces as an extension of splines have become a promising technique for addressing PDEs on models with complex topologies in isogeometric analysis.
Hailun Xu, Zepeng Wen, Hongmei Kang
doaj   +1 more source

Quasi-Interpolation in a Space of C² Sextic Splines over Powell–Sabin Triangulations

Mathematics, 2021
In this work, we study quasi-interpolation in a space of sextic splines defined over Powell–Sabin triangulations. These spline functions are of class C2 on the whole domain but fourth-order regularity is required at vertices and C3 regularity is imposed ...
Salah Eddargani, María José Ibáñez, Abdellah Lamnii, Mohamed Lamnii, Domingo Barrera   +4 more
doaj   +1 more source

Multilevel Quasi-Interpolation on Chebyshev Sparse Grids

Computation
This paper investigates the potential of utilising multilevel quasi-interpolation techniques on Chebyshev sparse grids for complex numerical computations.
Faisal Alsharif
doaj   +1 more source

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

Advanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič, G. Lukin, H. Torkashvand, A. Kerschbaum, M. Müller, S. Besendörfer, J. Heitmann, J. Friedrich   +7 more
wiley   +1 more source