Results 1 to 10 of about 36,121 (245)

The Padé interpolation method applied to additive difference Painlevé equations [PDF]

open access: yesLetters in Mathematical Physics, 2021
We study Padé interpolation problems on an additive grid, related to additive difference ($d$-) Painlevé equations of type $E_7^{(1)}$, $E_6^{(1)}$, $D_4^{(1)}$ and $A_3^{(1)}$. By choosing suitable Padé problems, we can derive time evolution equations, scalar Lax pairs of contiguous type and determinant formulae of special solutions given in terms of ...
Hidehito Nagao
exaly   +3 more sources

On convergence of solutions to difference equations with additive perturbations [PDF]

open access: yesJournal of Difference Equations and Applications, 2016
22 pages, 4 figures, to appear in Journal of Difference Equations and ...
Alexandra Rodkina, Elena Braverman
exaly   +3 more sources

Solving non-homogeneous non-Linear difference and differential equations by using additive and multiplicative derivative and integral with applications [PDF]

open access: yesMathematics and Computational Sciences
Difference equations are discrete analogy of the differential equations. These equations appearin mathematical modeling of physics and engineering problems, economic and population subjects thatdeal with discrete data and variables.In this article, we ...
Mohammad Jahanshahi   +2 more
doaj   +2 more sources

Comparing methods for glomerular filtration rate estimation [PDF]

open access: yesJournal of Clinical and Translational Science
Background: The glomerular filtration rate (GFR), estimated from serum creatinine (SCr), is widely used in clinical practice for kidney function assessment, but SCr-based equations are limited by non-GFR determinants and may introduce inaccuracies across
Xiaoqian Zhu   +7 more
doaj   +2 more sources

The Capacity Gains of Gaussian Channels with Unstable Versus Stable Autoregressive Noise [PDF]

open access: yesEntropy
In this paper, we consider Cover’s and Pombra’s formulation of feedback capacity of additive Gaussian noise (AGN) channels, with jointly Gaussian nonstationary and nonergodic noise.
Charalambos D. Charalambous   +3 more
doaj   +2 more sources

Two-dimensional-one-dimensional splitting scheme for the numerical solution of problems of transport of multicomponent suspensions using θ coordinates [PDF]

open access: yesE3S Web of Conferences, 2023
The work considers the spatial-three-dimensional problem of suspension transport, which takes into account many parameters and processes (multicomponent fractional composition of suspension, particle sedimentation rate, suspension distribution, intensity
Sukhinov Alexander   +1 more
doaj   +1 more source

MULTISPECTRAL IMAGE RESTORATION USING A VECTOR-VALUED REACTION-DIFFUSION BASED MIXED NOISE REMOVAL TECHNIQUE [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
A novel multispectral image filtering technique is proposed in this article. Since the multispectral images are often corrupted by mixed Poisson-Gaussian noise during the sensing and acquisition process, a nonlinear anisotropic diffusion-based ...
T. Barbu
doaj   +1 more source

Simultaneous Additive Equations: Repeated and Differing Degrees [PDF]

open access: yesCanadian Journal of Mathematics, 2017
Abstract We obtain bounds for the number of variables required to establish Hasse principles, both for the existence of solutions and for asymptotic formulæ, for systems of additive equations containing forms of differing degree but also multiple forms of like degree.
Brandes, Julia, Parsell, Scott T.
openaire   +2 more sources

LINEAR STOCHASTIC DISTRIBUTED MODEL OF MONEY ACCUMULATION IN THE FORM OF A STATE SPACE

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2021
The article deals with the problem of the passive parametric identification of systems for modeling the evolution of money savings income and expenses of one household using a linear stochastic distributed model in the form of a state space taking into ...
K. M. Bazikova   +2 more
doaj   +1 more source

Origin-based biomass allometric equations, biomass partitioning, and carbon concentration variations of planted and natural Larix gmelinii in northeast China

open access: yesGlobal Ecology and Conservation, 2020
The area of larch (Larix gmelinii) plantations in northeast China has increased following the massive afforestation program implemented by China’s central government to provide biomass for global carbon sink and the development of industrial sectors ...
Faris Rafi Almay Widagdo   +3 more
doaj   +1 more source

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