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MODEL::ODESystem Class Template Reference

#include <odesystem.h>

Inheritance diagram for MODEL::ODESystem:

[legend]Collaboration diagram for MODEL::ODESystem:

[legend]List of all members.

Public Types
typedef NT::number	numT
typedef NT::vect	vect
typedef NT::vf	vf
typedef NT::matrix	matrix
Public Methods
	ODESystem (TimeFrame &T, vf &detpart, vf &stochpart, vect &initial, Integration it=Euler, time res=1E-3)
	ODESystem (TimeFrame &T, vect &initial, Integrator< dims, nelem, NT > *i, time res=1e-3)
	ODESystem (TimeFrame &T, vf &detpart, vect &initial, Integration it, time res)
virtual	~ODESystem ()
virtual void	tick ()
const vect&	get_current (void)
void	set_current (const vect &hereandnow)
const vect&	operator() (void)
void	reset (void)
void	reset (const vect &fromhere)
time	relax (number goal=DEFAULT_RELAX)
time	relax_independent (number goal=DEFAULT_RELAX)
Private Attributes
vect	init
vect	current
Integrator<dims,nelem,NT>*	integ
vf*	deter
vf*	stoch
Static Private Attributes
const number	DEFAULT_RELAX = 1E-7

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Detailed Description

template<integer dims, typename nelem = number, class NT = NumericTraits<nelem,dims>> class MODEL::ODESystem

Integration of a system of ordinary differential equations. The system is split into a deterministic and a stochastic part. Different integration methods take these into account in different ways. You should move any effect due to a nonzero mean of the noise into the deterministic part

Todo:

Things to be added (wish list): Full solution of the stationary problem (using the NewtonRoot solver), stability of a certain point (or the nearest stable one, anyway).

Definition at line 49 of file odesystem.h.

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Constructor & Destructor Documentation

ODESystem ( TimeFrame & T, vf & detpart, vf & stochpart, vect & initial, Integration it = Euler, time res = 1E-3 )

dt is only a guiding value: Once linked to a timeframe, will recalculate it so it ends up fitting a whole number of times inside the resolution of the timeframe Definition at line 166 of file odesystem.h.

ODESystem ( TimeFrame & T, vect & initial, Integrator< dims, nelem, NT > * i, time res = 1e-3 )

The full constructor. You can pass your own integrator with parts, which will be deleted at the end of time Definition at line 202 of file odesystem.h.

ODESystem ( TimeFrame & T, vf & detpart, vect & initial, Integration it, time res )

A shortcut if you do not want to add a stochastic part Definition at line 226 of file odesystem.h.

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Member Function Documentation

const vect & get_current ( void ) [inline]

Get current values Definition at line 84 of file odesystem.h. Referenced by operator()().

const vect & operator() ( void ) [inline]

Overloaded for ease of use. Todo: This should be removed as it promoted confusion. current should be used instead. Definition at line 98 of file odesystem.h.

time relax ( number goal = DEFAULT_RELAX )

Calculate statitionairy value for current parameters. Returns time taken to relax Note: You cannot relax to a level smaller than the noise level. Parameters: goal   accurary required. Definition at line 298 of file odesystem.h.

time relax_independent ( number goal = DEFAULT_RELAX )

Use this function to relax to a stable state, without using the TimeFrame Definition at line 265 of file odesystem.h.

void reset ( const vect & fromhere ) [inline]

Reset everything - find a stable state to start from Definition at line 108 of file odesystem.h.

void reset ( void ) [inline]

A reset without specifying a new point Definition at line 101 of file odesystem.h. Referenced by ODESystem().

void tick ( ) [inline, virtual]

Whatever should be done when the time changes. This is where the resolution of the ODESystem is passed to the Integrator Reimplemented from MODEL::TickTock. Definition at line 77 of file odesystem.h.

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Member Data Documentation

const number DEFAULT_RELAX = 1E-7 [static, private]

Scanning a certain parameter Definition at line 145 of file odesystem.h.

vect current [private]

Current values Definition at line 151 of file odesystem.h.

vf * deter [private]

Deterministic Function Definition at line 157 of file odesystem.h.

vect init [private]

Initial values Definition at line 148 of file odesystem.h.

Integrator< dims, nelem, NT > * integ [private]

Integrator Definition at line 154 of file odesystem.h.

vf * stoch [private]

Stocastic Multiplier Definition at line 159 of file odesystem.h.

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The documentation for this class was generated from the following file:

• odesystem.h

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To get the sources or tarballs, please go to SourceForge or you can use the CVS repository.

More Info? Michael Peeters. Also, check our research website: www.alna.vub.ac.be

Last update: June 2002.

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