Results 1 to 10 of about 139,076 (281)

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   +2 more sources

Utilizing fractional-order operator to Alzheimer’s disease dynamics [PDF]

open access: yesScientific Reports
Fractional derivative modeling has become an important tool for studying and forecasting disease transmission dynamics. We propose a new mathematical model for Alzheimer’s disease, a condition in which dying and malfunctioning neurons impair memory.
Kottakkaran Sooppy Nisar   +1 more
doaj   +2 more sources

A kind of bivariate Bernoulli-type multiquadric quasi-interpolation operator with higher approximation order

open access: yesJournal of Inequalities and Applications, 2023
In this paper, a kind of bivariate Bernoulli-type multiquadric quasi-interpolation operator is studied by combining the known multiquadric quasi-interpolation operator with the generalized Taylor polynomial as the expansion in the bivariate Bernoulli ...
Ruifeng Wu
doaj   +1 more source

Linear-algebraic list decoding of folded Reed-Solomon codes [PDF]

open access: yes, 2011
Folded Reed-Solomon codes are an explicit family of codes that achieve the optimal trade-off between rate and error-correction capability: specifically, for any $\eps > 0$, the author and Rudra (2006,08) presented an $n^{O(1/\eps)}$ time algorithm to ...
Guruswami, Venkatesan
core   +2 more sources

Regular polynomial interpolation and approximation of global solutions of linear partial differential equations [PDF]

open access: yes, 2007
We consider regular polynomial interpolation algorithms on recursively defined sets of interpolation points which approximate global solutions of arbitrary well-posed systems of linear partial differential equations.
Kampen, Joerg
core   +4 more sources

Lebesgue functions and Lebesgue constants in polynomial interpolation

open access: yesJournal of Inequalities and Applications, 2016
The Lebesgue constant is a valuable numerical instrument for linear interpolation because it provides a measure of how close the interpolant of a function is to the best polynomial approximant of the function.
Bayram Ali Ibrahimoglu
doaj   +1 more source

A note on optimal Hermite interpolation in Sobolev spaces

open access: yesJournal of Inequalities and Applications, 2022
This paper investigates the optimal Hermite interpolation of Sobolev spaces W ∞ n [ a , b ] $W_{\infty }^{n}[a,b]$ , n ∈ N $n\in \mathbb{N}$ in space L ∞ [ a , b ] $L_{\infty }[a,b]$ and weighted spaces L p , ω [ a , b ] $L_{p,\omega }[a,b]$ , 1 ≤ p < ∞ $
Guiqiao Xu, Xiaochen Yu
doaj   +1 more source

Comparing Methods for Interpolation to Improve Raster Digital Elevation Models [PDF]

open access: yes, 2012
Digital elevation models (DEMs) are available as raster files at 100m, 30m, and 10m resolutions for the contiguous United States and are used in a variety of geographic analyses. Some projects may require a finer resolution.
Guarneri, J. C., Weih, R. C., Jr.
core   +3 more sources

COVID-19 epidemic curve in Brazil: a sum of multiple epidemics, whose inequality and population density in the states are correlated with growth rate and daily acceleration. An ecological study

open access: yesRevista da Sociedade Brasileira de Medicina Tropical, 2022
Background: The epidemic curve has been obtained based on the 7-day moving average of the events. Although it facilitates the visualization of discrete variables, it does not allow the calculation of the absolute variation rate.
Airandes de Sousa Pinto   +7 more
doaj   +1 more source

Extended Jensen’s functional for diamond integral via Green’s function and Hermite polynomial

open access: yesJournal of Inequalities and Applications, 2022
In this paper, with the help of Green’s function and Hermite interpolating polynomial, an extension of Jensen’s functional for n-convex functions is deduced from Jensen’s inequality involving diamond integrals.
Fazilat Bibi   +3 more
doaj   +1 more source

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