Results 31 to 40 of about 114,824,718 (296)

On Branching Processes in Random Environments

open access: yesThe Annals of Mathematical Statistics, 1969
$\{\zeta_n\}$ is a sequence of $\operatorname{iid}$ "environmental" variables in an abstract space $\Theta$. Each point $\zeta \varepsilon \Theta$ is associated with a $\operatorname{pgf} \phi_\zeta(s)$. The branching process $\{Z_n\}$ is defined as a Markov chain such that $Z_0 = k$, a finite integer, and given $Z_n$ and $\zeta_n, Z_{n+1}$ is ...
Smith, Walter L., Wilkinson, William E.
openaire   +3 more sources

Branching Processes in Random Environment with Sibling Dependence [PDF]

open access: yesJournal of Mathematical Sciences, 2020
We consider a population of particles with unit life length. Dying each particle produces offspring whose size depends on the random environment specifying the reproduction law of all particles of the given generation and on the number of relatives of the particle.
Vatutin, V. A., Dyakonova, E. E.
openaire   +2 more sources

Quenched invariance principles for random walks and elliptic diffusions in random media with boundary [PDF]

open access: yes, 2014
Via a Dirichlet form extension theorem and making full use of two-sided heat kernel estimates, we establish quenched invariance principles for random walks in random environments with a boundary.
Croydon, David A.   +5 more
core   +1 more source

φ-branching processes in a random environment [PDF]

open access: yesApplicationes Mathematicae, 1984
Let \(\phi\) be a function mapping the set of non-negative integers into itself such that \(\phi (0)=0\). Consider a sequence of integer valued random variables \(\{Z_ n\), \(n=0,1,...\}\) and suppose that they satisfy the condition \[ Z_ 0=m,\quad E(s^{Z_{n+1}}| {\mathcal F}_ n({\bar\xi }))=[f_{\xi_ n}(s)]^{\phi (Z_ n)},\quad n\geq 0,| s|\leq 1 ...
openaire   +2 more sources

Statistical Approach to the Analysis of the Corrosive Behaviour of NiTi Alloys under the Influence of Different Seawater Environments

open access: yesApplied Sciences, 2021
Probabilistic models of corrosion rate estimation in the case of two NiTi alloys obtained by different technological processes are analysed in this paper.
Nataša Kovač   +4 more
doaj   +1 more source

Random diffusivity from stochastic equations: comparison of two models for Brownian yet non-Gaussian diffusion

open access: yesNew Journal of Physics, 2018
A considerable number of systems have recently been reported in which Brownian yet non-Gaussian dynamics was observed. These are processes characterised by a linear growth in time of the mean squared displacement, yet the probability density function of ...
Vittoria Sposini   +4 more
doaj   +1 more source

Microbial Communities in a Serpentinizing Aquifer Are Assembled through Strong Concurrent Dispersal Limitation and Selection

open access: yesmSystems, 2021
In recent years, our appreciation of the extent of habitable environments in Earth’s subsurface has greatly expanded, as has our understanding of the biodiversity contained within.
Lindsay I. Putman   +7 more
doaj   +1 more source

Frequency-specific modulation of population-level frequency tuning in human auditory cortex

open access: yesBMC Neuroscience, 2009
Background Under natural circumstances, attention plays an important role in extracting relevant auditory signals from simultaneously present, irrelevant noises.
Roberts Larry E   +4 more
doaj   +1 more source

Leveraging Advanced Machine Learning to Predict Turbulence Dynamics From Temperature Observations at an Experimental Prescribed Fire

open access: yesIEEE Access
This study explores the potential to predict turbulent kinetic energy (TKE) from more readily acquired temperature data using temperature profiles and turbulence data collected concurrently at 10 Hz during a small experimental prescribed burn in the New ...
Dipak Dulal   +4 more
doaj   +1 more source

Multivariate analysis of functional metagenomes

open access: yesFrontiers in Genetics, 2013
Metagenomics is a primary tool for the description of microbial and viral communities. The sheer magnitude of the data generated in each metagenome makes identifying key differences in the function and taxonomy between communities difficult to elucidate.
Elizabeth A. Dinsdale   +16 more
doaj   +1 more source

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