Results 21 to 30 of about 7,699,774 (306)

Stochastic Frontier Models [PDF]

open access: yes, 2008
The stochastic frontier model was first proposed in the context of production function estimation to account for the effect of technical inefficiency. The inefficiency causes actual output to fall below the potential level (that is, the production frontier) and also raises production cost above the minimum level (that is, the cost frontier).
openaire   +1 more source

Almost Periodic Solutions for Impulsive Fractional Stochastic Evolution Equations

open access: yesInternational Journal of Analysis and Applications, 2014
In this paper, we consider the existence of square-mean piecewise almost periodic solutions for impulsive fractional stochastic evolution equations involving Caputo fractional derivative.
Toufik Guendouzi, Lamia Bousmaha
doaj   +2 more sources

Threshold stochastic unit root models [PDF]

open access: yes, 2002
This paper introduces a new class of stochastic unit root (STUR) processes, where the randomness of the autorregresive unit root is driven by a threshold variable.
Gonzalo, Jesús, Montesinos, Raquel
core   +1 more source

Almost periodic mild solutions for stochastic delay functional. differential equations driven by a fractional Brownian motion [PDF]

open access: yesRomanian Journal of Mathematics and Computer Science, 2014
In this paper we investigate the existence and stability of quadratic-mean almost periodic mild solutions to stochastic delay functional differential equations driven by fractional Brownian motion with Hurst parameter H > 1/2 , under some suitable ...
Toufik Guendouzi,, Khadem Mehdi
doaj  

Stochastic Modelling of Turbulent Flows for Numerical Simulations

open access: yesFluids, 2020
Numerical simulations are a powerful tool to investigate turbulent flows, both for theoretical studies and practical applications. The reliability of a simulation is mainly dependent on the turbulence model adopted, and improving its accuracy is a ...
Carlo Cintolesi, Etienne Mémin
doaj   +1 more source

Stochastic fluctuations in apoptotic threshold of tumour cells can enhance apoptosis and combat fractional killing [PDF]

open access: yesRoyal Society Open Science, 2020
Fractional killing, which is a significant impediment to successful chemotherapy, is observed even in a population of genetically identical cancer cells exposed to apoptosis-inducing agents.
Baohua Qiu   +2 more
doaj   +1 more source

Modeling of Infantry Attacks on Real Terrain

open access: yesNonlinear Analysis, 2008
. The estimation of the terrain features can be completely carried out by using the Geographical Information System (GIS). GIS technologies and three-dimensional map in planning battle tactics are discussed. An infantry attack on real terrain is modeled. 
A. Pincevičius   +3 more
doaj   +1 more source

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

open access: yesFEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace   +6 more
wiley   +1 more source

The intelligent technologies application in modelling of military task

open access: yesLietuvos Matematikos Rinkinys, 2011
By using information bases of Geographic Information Systems (GIS) and the system of computer algebraMAPLE, created system for planning military actions and estimating capabilities of a military unit to execute a certain task.
Albertas Pincevičius
doaj   +1 more source

Design and analysis strategies for robust microbiome ageing research

open access: yesFEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik   +5 more
wiley   +1 more source

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