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A coupled finite element–global random walk approach to advection-dominated transport in porous media with random hydraulic conductivity

8 years ago

AbstractSolute transport through heterogeneous porous media considered in environmental and industrial problems is often characterized by high Péclet numbers. In…

Solute transport in aquifers with evolving scale heterogeneity

8 years ago

AbstractTransport processes in groundwater systems with spatially heterogeneous properties often exhibit anomalous behavior. Using first-order approximations in velocity fluctuations we…

Consistency issues in PDF methods

8 years ago

AbstractConcentrations of chemical species transported in random environments need to be statistically characterized by probability density functions (PDF). Solutions to evolution equations…

A Fokker-Planck approach for probability distributions of species concentrations transported in heterogeneous media

8 years ago

AbstractWe identify sufficient conditions under which evolution equations for probability density functions (PDF) of random concentrations are equivalent to Fokker–Planck…

On a compound approximation operator of D.D. Stancu type

8 years ago

AbstractIn this note we consider a linear and positive compound approximation operator of D.D. Stancu type depending of several parameters.…

Rate of approximation for certain Durrmeyer operators

8 years ago

AbstractIn the present note, we study a certain Durrmeyer type integral modification of Bernstein polynomials. We investigate simultaneous approximation and…

Order 1 autoregressive process of finite length

8 years ago

AbstractThe stochastic processes of finite length defined by recurrence relations request additional relations specifying the first terms of the process analogously to…

Towards a filtered density function approach for reactive transport in groundwater

8 years ago

AbstractEvolution equations for probability density functions (PDFs) and filtered density functions (FDFs) of random species concentrations weighted by conserved scalars…

Influence of deterministic trend on the estimated parameters of GARCH(1,1) model

8 years ago

AbstractThe log returns of financial time series are usually modeled by means of the stationary GARCH(1,1) stochastic process or its…

Serial correlation of detrended time series

8 years ago

AbstractA preliminary essential procedure in time series analysis is the separation of the deterministic component from the random one. If…

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