نتایج جستجو برای: stochastic differential model

تعداد نتایج: 2416355  

M. Khoveyni, R. Eslami ,

In this current study a generalized super-efficiency model is first proposed for ranking extreme efficient decision making units (DMUs) in stochastic data envelopment analysis (DEA) and then, a deterministic (crisp) equivalent form of the stochastic generalized super-efficiency model is presented. It is shown that this deterministic model can be converted to a quadratic programming model. So fa...

2013
Susanne Ditlevsen Adeline Samson

This chapter is concerned with continuous time processes, which are often modeled as a system of ordinary differential equations (ODEs). These models assume that the observed dynamics are driven exclusively by internal, deterministic mechanisms. However, real biological systems will always be exposed to influences that are not completely understood or not feasible to model explicitly. Ignoring ...

2004
A. Golightly D. J. Wilkinson

This paper is concerned with the Bayesian estimation of stochastic rate constants in the context of dynamic models of intra-cellular processes. The underlying discrete stochastic kinetic model is replaced by a diffusion approximation (or stochastic differential equation approach) where a white noise term models stochastic behaviour and the model is identified using equispaced time course data. ...

Journal: :Biometrics 2005
A Golightly D J Wilkinson

This article is concerned with the Bayesian estimation of stochastic rate constants in the context of dynamic models of intracellular processes. The underlying discrete stochastic kinetic model is replaced by a diffusion approximation (or stochastic differential equation approach) where a white noise term models stochastic behavior and the model is identified using equispaced time course data. ...

2017
MARTIN REDMANN MELINA A. FREITAG M. A. FREITAG

When solving linear stochastic differential equations numerically, usually a high order spatial discretisation is used. Balanced truncation (BT) and singular perturbation approximation (SPA) are well-known projection techniques in the deterministic framework which reduce the order of a control system and hence reduce computational complexity. This work considers both methods when the control is...

2010
G. MIRCEA M. NEAMTU

This paper addresses an autonomous stochastic system with delay and associated fuzzy and hybrid models, which describe a monetary system involving interest rate, investment demand and price index. We analyze the deterministic model and the stochastic model with perturbation. For the stochastic system with delay we identify the differential equations for the mean values as well as for the mean s...

Journal: :Finance and Stochastics 2009
Mariko Ninomiya Syoiti Ninomiya

The authors report on the construction of a new algorithm for the weak approximation of stochastic differential equations. In this algorithm, an ODE-valued random variable whose average approximates the solution of the given stochastic differential equation is constructed by using the notion of free Lie algebras. It is proved that the classical Runge–Kutta method for ODEs is directly applicable...

Journal: :Journal of theoretical biology 2010
Joel C Miller Bahman Davoudi Rafael Meza Anja C Slim Babak Pourbohloul

We study the spread of susceptible-infected-recovered (SIR) infectious diseases where an individual's infectiousness and probability of recovery depend on his/her "age" of infection. We focus first on early outbreak stages when stochastic effects dominate and show that epidemics tend to happen faster than deterministic calculations predict. If an outbreak is sufficiently large, stochastic effec...

Journal: :civil engineering infrastructures journal 0
bita analui phd candidate, institute of statistics and operations research (isor), university of vienna, vienna, austria. raimund kovacevic phd, institute of statistics and operations research (isor), university of vienna, vienna,austria.

multistage stochastic programming is a key technology for making decisions over time in an uncertain environment. one of the promising areas in which this technology is implementable, is medium term planning of electricity production and trading where decision makers are typically faced with uncertain parameters (such as future demands and market prices) that can be described by stochastic proc...

2009
Mariko Ninomiya

The authors report on the construction of a new algorithm for the weak approximation of stochastic differential equations. In this algorithm, anODE-valued randomvariablewhose average approximates the given stochastic differential equation is constructed by using the notion of free Lie algebra. It is proved that the classical Runge–Kutta method for ODEs is directly applicable to the drawn ODE fr...

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