نتایج جستجو برای: discrete lumping model

تعداد نتایج: 2219887  

Journal: :Applied Physics Research 2019

2007
M. Möller

A new generalization of the flux-corrected transport (FCT) methodology to implicit finite element discretizations is proposed. The underlying high-order scheme is supposed to be unconditionally stable and produce time-accurate solutions to evolutionary convection problems. Its nonoscillatory low-order counterpart is constructed by means of mass lumping followed by elimination of negative off-di...

Journal: :Physical Review D 2014

Journal: :PROCEEDINGS OF HYDRAULIC ENGINEERING 1995

Journal: :Health economics 2007
Alan Brennan Samer A Kharroubi

Expected value of sample information (EVSI) involves simulating data collection, Bayesian updating, and re-examining decisions. Bayesian updating in Weibull models typically requires Markov chain Monte Carlo (MCMC). We examine five methods for calculating posterior expected net benefits: two heuristic methods (data lumping and pseudo-normal); two Bayesian approximation methods (Tierney & Kadane...

Journal: :Environmental Modelling and Software 2011
Vardit Makler-Pick Gideon Gal Malka Gorfine Matthew R. Hipsey Yohay Carmel

A strategy for global sensitivity analysis of a multi-parameter ecological model was developed and used for the hydrodynamic-ecological model (DYRESMeCAEDYM, DYnamic REservoir Simulation ModelComputational Aquatic Ecosystem Dynamics Model) applied to Lake Kinneret (Israel). Two different methods of sensitivity analysis, RPART (Recursive Partitioning And Regression Trees) and GLM (General Linear...

Nowadays, numerical modelings play a key role in analyzing hydraulic problems in fractured rock media. The discrete fracture network model is one of the most used numerical models to simulate the geometrical structure of a rock-mass. In such media, discontinuities are considered as discrete paths for fluid flow through the rock-mass while its matrix is assumed impermeable. There are two main pa...

2016
Luca Cardelli Mirco Tribastone Max Tschaikowski Andrea Vandin

We present an algorithm to compute exact aggregations of a class of systems of ordinary differential equations (ODEs). Our approach consists in an extension of Paige and Tarjan’s seminal solution to the coarsest refinement problem by encoding an ODE system into a suitable discrete-state representation. In particular, we consider a simple extension of the syntax of elementary chemical reaction n...

2007
LEOPOLDO P. FRANCA ALESSANDRO RUSSO

We show that three well-known \variational crimes" in nite elements { upwinding, mass lumping and selective reduced integration { may be derived from the Galerkin method employing the standard polynomial-based nite element spaces enriched with residual-free bubbles.

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