Search Results - subject:"interpolation"

Estimación de los flujos de transporte de mercancías interregionales trimestrales mediante técnicas de interpolación temporal/Estimating Quarterly Interregional Commodity Transport...

GALLEGO LÓPEZ, NURIA; LLANO VERDURAS, CARLOS; PEREZ … - In: Estudios de Economía Aplicada 28 (2010) Diciembre, pp. 699-699

, 1994; Di Fonzo y Marini, 2003) interpolation methods, which are applied to high-frequency indicators concerning the …

Persistent link: https://www.econbiz.de/10008794505

Expanding an abridged life table

Kostaki, Anastasia; Panousis, Vagelis - In: Demographic Research 5 (2001) 1, pp. 1-22

A question of interest in the demographic and actuarial fields is the estimation of the age-specific mortality pattern when data are given in age groups. Data can be provided in such a form usually because of systematic fluctuations caused by age heaping. This is a phenomenon usual to vital...

Persistent link: https://www.econbiz.de/10005557963

Construction of flexible blending parametric surfaces via curves

Belkhatir, Bachir; Zidna, Ahmed - In: Mathematics and Computers in Simulation (MATCOM) 79 (2009) 12, pp. 3599-3608

The main purpose of this paper is to provide a method that allows to solve the blending problem of two parametric surfaces. The blending surface is constructed with a collection of space curves defined by point pairs on the blending boundaries of given primary surfaces. Bézier and C-cubic...

Persistent link: https://www.econbiz.de/10010870115

Optimal interpolation of buoy data into a deterministic wind–wave model

Sannasiraj, S.; Goldstein, M. - In: Natural Hazards 49 (2009) 2, pp. 261-274

assimilation. In the present study, an operationally efficient yet a versatile assimilation model, optimal interpolation (OI), has …

Persistent link: https://www.econbiz.de/10010846225

On Chebyshev-type integral quasi-interpolation operators

Fortes, M.A.; Ibáñez, M.J.; Rodríguez, M.L. - In: Mathematics and Computers in Simulation (MATCOM) 79 (2009) 12, pp. 3478-3491

estimate for the quasi-interpolation error. It depends on how well the quasi-interpolation operator approximates the first non …

Persistent link: https://www.econbiz.de/10011050500

On the uniform convergence of the Chebyshev interpolants for solitons

Chugunova, Marina; Pelinovsky, Dmitry - In: Mathematics and Computers in Simulation (MATCOM) 80 (2009) 4, pp. 794-803

We discuss polynomial interpolation and derive sufficient conditions for the uniform convergence of Chebyshev …

Persistent link: https://www.econbiz.de/10011051134

A new algorithm for a recursive construction of the minimal interpolation space

Sbibih, D.; Serghini, A.; Tijini, A. - In: Mathematics and Computers in Simulation (MATCOM) 79 (2009) 12, pp. 3587-3598

In this work, we introduce a new interpolation algorithm, based on a recursive method for computing Lagrange … interpolants. This algorithm allows to construct recursively the minimal interpolation space (see [1]) with respect to a finite set … of points. We also extend this recursive method to the osculatory interpolation problem. …

Persistent link: https://www.econbiz.de/10010749511

A mathematical estimate within economic discounting computations

Elena, CIOLAC Camelia - In: Economia. Seria Management 12 (2009) 2 Special, pp. 103-108

The paper aims to evaluate the opportunity of using mathematic estimation models within economic discounting computation. Several approximation models from the numerical methods theory will be considered in order to determine the evolution trend for investment projects’ economic indicators....

Persistent link: https://www.econbiz.de/10005002673

Imputation and price indexes: Theory and evidence from the international price program

Feenstra, Robert C.; Diewert, W. Erwin - 2000

related commodities; and linear interpolation, which uses the last and next observations for the item to linearly interpolate …. Certain hybrid techniques, combining either carry-forward or cell-mean with linear interpolation, are also considered. Our … price index: (3) linear interpolation results in less fluctuation of prices than the true series: (4) combining either carry …

Persistent link: https://www.econbiz.de/10010318606

On Convex Quadratic Approximation

Den Hertog, Dick; de Klerk, Etienne; Roos, J. - Tilburg University, Center for Economic Research - 2000

In this paper we prove the counterintuitive result that the quadratic least squares approximation of a multivariate convex function in a finite set of points is not necessarily convex, even though it is convex for a univariate convex function. This result has many consequences both for the field...

Persistent link: https://www.econbiz.de/10011090460