Results 41 to 50 of about 617,206 (220)

STANCE: a unified statistical model to detect cell-type-specific spatially variable genes in spatial transcriptomics

open access: yesNature Communications
One of the major challenges in spatial transcriptomics is to detect spatially variable genes (SVGs), whose expression patterns are non-random across tissue locations.
Haohao Su   +3 more
doaj   +1 more source

Positive Correlation between Normal Serum Gastrin Concentrations and Antral and Duodenal G Cells

open access: yesCanadian Journal of Gastroenterology, 1994
It is controversial whether there is a correlation between serum gastrin concentrations and the density of G cells in the antral or duodenal mucosa. In this study, endoscopically obtained antral and duodenal biopsies were stained immunocytochemically for
WR Yacoub   +4 more
doaj   +1 more source

Estimation of Threshold Effect of Kenyan Shilling Exchange Rate on Rwandan Economy: A Semiparametric Model Approach

open access: yesJournal of Applied Mathematics
The exchange rate is an important variable in international trade which is used as a parameter to determine a country’s international competitiveness and indicates the position of the country’s economy. A change in the exchange rate of the Kenya shilling
Charline Uwilingiyimana   +3 more
doaj   +1 more source

The Holling Type II Population Model Subjected to Rapid Random Attacks of Predator

open access: yesJournal of Applied Mathematics, 2018
We present the analysis of a mathematical model of the dynamics of interacting predator and prey populations with the Holling type random trophic function under the assumption of random time interval passage between predator attacks on prey. We propose a
Jevgeņijs Carkovs   +2 more
doaj   +1 more source

Gaussian Volterra processes with power-type kernels. Part I

open access: yesModern Stochastics: Theory and Applications, 2022
The stochastic process of the form \[ {X_{t}}={\int _{0}^{t}}{s^{\alpha }}\left({\int _{s}^{t}}{u^{\beta }}{(u-s)^{\gamma }}\hspace{0.1667em}du\right)\hspace{0.1667em}d{W_{s}}\] is considered, where W is a standard Wiener process, $\alpha >-\frac{1}{
Yuliya Mishura, Sergiy Shklyar
doaj   +1 more source

Stability Estimates for Finite-Dimensional Distributions of Time-Inhomogeneous Markov Chains

open access: yesMathematics, 2020
This paper is devoted to the study of the stability of finite-dimensional distribution of time-inhomogeneous, discrete-time Markov chains on a general state space.
Vitaliy Golomoziy, Yuliya Mishura
doaj   +1 more source

On the Calibration of the Kennedy Model

open access: yesMathematics
The Kennedy model offers a robust framework for modeling forward rates, leveraging Gaussian random fields to accommodate emerging phenomena such as negative rates.
Dalma Tóth-Lakits, Miklós Arató
doaj   +1 more source

Ergodic properties of the solution to a fractional stochastic heat equation, with an application to diffusion parameter estimation

open access: yesModern Stochastics: Theory and Applications, 2020
The paper deals with a stochastic heat equation driven by an additive fractional Brownian space-only noise. We prove that a solution to this equation is a stationary and ergodic Gaussian process. These results enable us to construct a strongly consistent
Diana Avetisian, Kostiantyn Ralchenko
doaj   +1 more source

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