Sentences with phrase «within nonlinear models»

We find some sizable, significant peer effects within nonlinear models, but not with linear specifications.

Not exact matches

The framework is based on solving nonlinear coupled ordinary and partial differential equations that model the kinetics of the following phenomena: (1) mass transport in the electrolyte and electrode using the Nernst - Planck equation; (2) electrical potential distribution using the Poisson equation; (3) interfacial reactions that determine the boundary conditions or source terms (using the Butler - Volmer equation or constant - flux conditions); and (4) evolution of the electrode / electrolyte interface using the Allen - Cahn equation within the phase - field modeling (PFM) approach.

I guess I don't understand how a climate model could reflect a linear expectation for centuries and also contain a trigger for a nonlinear collapse within the timeframe of the organizer on Al Gore's Blackberry.

Experience with solution algorithms, data assimilation methods and tools, coupling of components and processes, nonlinear and linear solvers, limiters, and / or other numerical issues common with complex codes within earth system models of varying complexity

One might (or might not) argue for such a relation if the models were empirically adequate, but given nonlinear models with large systematic errors under current conditions, no connection has been even remotely established for relating the distribution of model states under altered conditions to decision - relevant probability distributions... There may well exist thresholds, or tipping points (Kemp 2005), which lie within this range of uncertainty.