Piecewise Bivariate Hermite Interpolations for Large Sets of Scattered Data
The requirements for interpolation of scattered data are high accuracy and high efficiency. In this paper, a piecewise bivariate Hermite interpolant satisfying these requirements is proposed. We firstly construct a triangulation mesh using the given scattered point set. Based on this mesh, the compu...
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Online Access: | http://dx.doi.org/10.1155/2013/239703 |
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doaj-ecb2cc427df6429a91c3655f8563dd5a2020-11-25T00:55:03ZengHindawi LimitedJournal of Applied Mathematics1110-757X1687-00422013-01-01201310.1155/2013/239703239703Piecewise Bivariate Hermite Interpolations for Large Sets of Scattered DataRenzhong Feng0Yanan Zhang1School of Mathematics and Systematic Science, Beijing University of Aeronautics and Astronautics, Beijing 100191, ChinaSchool of Mathematics and Systematic Science, Beijing University of Aeronautics and Astronautics, Beijing 100191, ChinaThe requirements for interpolation of scattered data are high accuracy and high efficiency. In this paper, a piecewise bivariate Hermite interpolant satisfying these requirements is proposed. We firstly construct a triangulation mesh using the given scattered point set. Based on this mesh, the computational point (x,y) is divided into two types: interior point and exterior point. The value of Hermite interpolation polynomial on a triangle will be used as the approximate value if point (x,y) is an interior point, while the value of a Hermite interpolation function with the form of weighted combination will be used if it is an exterior point. Hermite interpolation needs the first-order derivatives of the interpolated function which is not directly given in scatted data, so this paper also gives the approximate derivative at every scatted point using local radial basis function interpolation. And numerical tests indicate that the proposed piecewise bivariate Hermite interpolations are economic and have good approximation capacity.http://dx.doi.org/10.1155/2013/239703 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Renzhong Feng Yanan Zhang |
spellingShingle |
Renzhong Feng Yanan Zhang Piecewise Bivariate Hermite Interpolations for Large Sets of Scattered Data Journal of Applied Mathematics |
author_facet |
Renzhong Feng Yanan Zhang |
author_sort |
Renzhong Feng |
title |
Piecewise Bivariate Hermite Interpolations for Large Sets of Scattered Data |
title_short |
Piecewise Bivariate Hermite Interpolations for Large Sets of Scattered Data |
title_full |
Piecewise Bivariate Hermite Interpolations for Large Sets of Scattered Data |
title_fullStr |
Piecewise Bivariate Hermite Interpolations for Large Sets of Scattered Data |
title_full_unstemmed |
Piecewise Bivariate Hermite Interpolations for Large Sets of Scattered Data |
title_sort |
piecewise bivariate hermite interpolations for large sets of scattered data |
publisher |
Hindawi Limited |
series |
Journal of Applied Mathematics |
issn |
1110-757X 1687-0042 |
publishDate |
2013-01-01 |
description |
The requirements for interpolation of scattered data are high accuracy and high efficiency. In this paper, a piecewise bivariate Hermite interpolant satisfying these requirements
is proposed. We firstly construct a triangulation mesh using the given scattered point set. Based on this mesh, the computational point (x,y) is divided into two types: interior point and exterior point. The value of Hermite interpolation polynomial on a triangle will be used as the approximate value if point (x,y) is an interior point, while the value of a Hermite interpolation function with the form of weighted combination will be used if it is an exterior point. Hermite interpolation needs the first-order derivatives of the interpolated function which is not directly given in scatted data, so this paper also gives the approximate derivative at every scatted point using local radial basis function interpolation. And numerical tests indicate that the proposed piecewise bivariate Hermite interpolations are economic and have good approximation capacity. |
url |
http://dx.doi.org/10.1155/2013/239703 |
work_keys_str_mv |
AT renzhongfeng piecewisebivariatehermiteinterpolationsforlargesetsofscattereddata AT yananzhang piecewisebivariatehermiteinterpolationsforlargesetsofscattereddata |
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1725232370783617024 |