Results 11 to 20 of about 405,126 (272)

Elucidating tricuspid Doppler signal interpolation and its implication for assessing pulmonary hypertension

open access: yesPulmonary Circulation, 2022
Doppler echocardiography plays a central role in the assessment of pulmonary hypertension (PAH). We aim to improve quality assessment of systolic pulmonary arterial pressure (SPAP) by applying a cubic polynomial interpolation to digitized tricuspid ...
Seraina A. Dual   +12 more
doaj   +1 more source

A New Definition of the Dual Interpolation Curve for CAD Modeling and Geometry Defeaturing

open access: yesMathematics, 2023
The present paper provides a new definition of the dual interpolation curve in a geometric-intuitive way based on adaptive curve refinement techniques.
Baotao Chi   +5 more
doaj   +1 more source

USING ELECTRONIC NAVIGATIONAL CHART FOR 3D BATHYMETRIC MODEL OF THE PORT OF NAPLES [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
Nautical charts generally report fundamental knowledge for the safety of navigation. This information also includes sea depth data reported as depth points or contour lines, which can be used to build a 3D model of the seabed.
E. Alcaras   +4 more
doaj   +1 more source

Upper Bound for Lebesgue Constant of Bivariate Lagrange Interpolation Polynomial on the Second Kind Chebyshev Points

open access: yesJournal of Mathematics, 2022
In the paper, we study the upper bound estimation of the Lebesgue constant of the bivariate Lagrange interpolation polynomial based on the common zeros of product Chebyshev polynomials of the second kind on the square −1,12. And, we prove that the growth
Juan Liu, Laiyi Zhu
doaj   +1 more source

On Polynomial and Polynomial Matrix Interpolation [PDF]

open access: yes, 2002
The classical algorithms for computations with polynomials and polynomial matrices use elementary operations with their coefficients. The relative accuracy of such algorithms is relatively small and for polynomials of higher order and polynomial matrices of higher dimension the executing time grows very quickly.
Petr Husek, Renata Pytelková
openaire   +1 more source

Polynomial cubic splines with tension properties [PDF]

open access: yes, 2010
In this paper we present a new class of spline functions with tension properties. These splines are composed by polynomial cubic pieces and therefore are conformal to the standard, NURBS based CAD/CAM ...
Costantini, P.   +2 more
core   +4 more sources

Some applications of Sigmoid functions [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2021
In numerical analysis, the process of fitting a function via given data is called interpolation. Interpolation has many applications in engineering and science.
M. A. Jafari, A. Aminataei
doaj   +1 more source

Quantum interpolation of polynomials [PDF]

open access: yesQuantum Information and Computation, 2011
Can a quantum computer efficiently interpolate polynomials? We consider black-box algorithms that seek to learn information about a polynomial $f$ from input/output pairs $(x_i, f(x_i))$. We define a more general class of \emph{$(d,S)$-independent} function properties, where, outside of a set $S$ of exceptions, knowing $d$ input values does not help ...
Daniel M. Kane, Samuel A. Kutin
openaire   +4 more sources

A new interpolation method based on satellite physical character in using IGS precise ephemeris

open access: yesGeodesy and Geodynamics, 2014
Due to the deficiency of sliding Lagrange polynomial interpolation, the author proposes a new interpolation method, which considers the physical character of satellite movement in coordinate transformation and reasonable selection of interpolation ...
Liu Weiping, Hao Jinming
doaj   +1 more source

Tricubic Polynomial Interpolation [PDF]

open access: yesProceedings of the National Academy of Sciences, 1971
A new triangular “finite element“ is described; it involves the 12-parameter family of all quartic polynomial functions that are “tricubic“ in that their variation is cubic along any parallel to any side of the triangle. An interpolation scheme is described that approximates quite accurately any smooth function on any triangulated domain by a ...
openaire   +2 more sources

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