Results 41 to 50 of about 242 (53)

Error analysis for quadratic spline quasi-interpolants on non-uniform criss-cross triangulations of bounded rectangular domains

open access: yes, 2006
Given a non-uniform criss-cross partition of a rectangular domain $\Omega$, we analyse the error between a function $f$ defined on $\Omega$ and two types of $C^1$-quadratic spline quasi-interpolants (QIs) obtained as linear combinations of B-splines with
Dagnino, Catterina, Sablonnière, Paul
core   +1 more source

On nonlinear weighted least squares fitting of the three-parameter inverse Weibull distribution [PDF]

open access: yes, 2010
In this paper we consider nonlinear least squares fitting of the three-parameter inverse Weibull distribution to the given data $(w_i,t_i,y_i)$, $i=1,ldots,n$, $ngeq 3$. As the main result, we show that the least squares estimate exists provided that the
Darija Marković, Dragan Jukić
core   +1 more source

Least squares fitting of spheres and ellipsoids using not orthogonal distances [PDF]

open access: yes, 2001
Berman [1] examined the problem of estimating the parameters of a circle when angular differences between successively measured data points were also measured. Applications were reported. Späth [4] generalized that problem by considering an ellipse.
H. Späth
core  

Analysis of solution of the least squares problem [PDF]

open access: yes, 1999
For the given data $(p_i,t_i,f_i),$ $i=1,ldots,m$, we consider the existence problem of the best parameter approximation of the exponential model function in the sense of ordinary least squares and total least squares.
D. Jukić, R. Scitovski
core   +1 more source

Optimal designs for free knot least squares splines [PDF]

open access: yes
In this paper D-optimal designs for free knot least squares spline estimation are investigated. In contrast to most of the literature on optimal design for spline regression models it is assumed that the knots of the spline are also estimated from the ...
Dette, Holger   +2 more
core  

Sensitivity studies of pollutant concentrations calculated by the UNI-DEM with respect to the input emissions

open access: yesOpen Mathematics, 2013
Dimov Ivan   +3 more
doaj   +1 more source

Engineering images designed by fractal subdivision scheme. [PDF]

open access: yesSpringerplus, 2016
Mustafa G, Bari M, Jamil S.
europepmc   +1 more source

Optimal designs for smoothing splines [PDF]

open access: yes
In the common nonparametric regression model we consider the problem of constructing optimal designs, if the unknown curve is estimated by a smoothing spline.
Dette, Holger   +2 more
core  

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