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- W2056527809 abstract "This paper is concerned with the nonnegativity preserving interpolation of data on rectangular grids. The function is a kind of bivariate rational interpolation spline with parameters, which is<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msup><mml:mi>C</mml:mi><mml:mtext>1</mml:mtext></mml:msup></mml:math>in the whole interpolation region. Sufficient conditions are derived on coefficients in the rational spline to ensure that the surfaces are always nonnegative if the original data are nonnegative. The gradients at the data sites are modified if necessary to ensure that the nonnegativity conditions are fulfilled. Some numerical examples are illustrated in the end of this paper." @default.
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- W2056527809 date "2012-01-01" @default.
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- W2056527809 title "Nonnegativity Preserving Interpolation byC1Bivariate Rational Spline Surface" @default.
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- W2056527809 doi "https://doi.org/10.1155/2012/624978" @default.
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