Implementation of LOCA::Abstract::Iterator for computing points along a continuation curve. More...

#include <LOCA_AdaptiveStepper.H>

Inheritance diagram for LOCA::AdaptiveStepper:

Collaboration diagram for LOCA::AdaptiveStepper:

Public Member Functions
	AdaptiveStepper (const Teuchos::RCP< Teuchos::ParameterList > &pList, const Teuchos::RCP< ::Thyra::AdaptiveSolutionManager > &mgr, const Teuchos::RCP< LOCA::GlobalData > &global_data, const Teuchos::RCP< NOX::StatusTest::Generic > &nt)

virtual	~AdaptiveStepper ()
	Destructor.

bool	eigensolverReset (Teuchos::RCP< Teuchos::ParameterList > &newEigensolverList)
	Replaces the eigensolver parameter list.

virtual Teuchos::RCP< const LOCA::MultiContinuation::AbstractGroup >	getSolutionGroup () const
	Return the current solution group.

virtual Teuchos::RCP< const LOCA::MultiContinuation::AbstractGroup >	getBifurcationGroup () const
	Return the current bifurcation group. More...

virtual Teuchos::RCP< const Teuchos::ParameterList >	getList () const
	Return the output parameters from the stepper algorithm.

virtual Teuchos::RCP< const NOX::Solver::Generic >	getSolver () const
	Return the current nonlinear solver pointer. More...

virtual double	getContinuationParameter () const
	Return the current continuation parameter from the underlying LOCA::MultiContinuation::AbstractStrategy. More...

virtual LOCA::Abstract::Iterator::IteratorStatus	run ()
	Run the iterator.

Public Member Functions inherited from LOCA::Abstract::Iterator
	Iterator (Teuchos::ParameterList &p)
	Constructor.

	Iterator (const Iterator &it)
	Copy Constructor.

virtual	~Iterator ()
	Destructor.

virtual bool	resetIterator (Teuchos::ParameterList &p)
	Reset the iterator to start a new iteration.

virtual IteratorStatus	getIteratorStatus () const
	Return the status of the iterator.

virtual int	getStepNumber () const
	Returns the number of accepted steps.

virtual int	getNumFailedSteps () const
	Returns the number of failed steps.

virtual int	getNumTotalSteps () const
	Returns the total number of steps attempted.

Protected Member Functions
void	setSolutionGroup (const Teuchos::RCP< LOCA::MultiContinuation::AbstractGroup > &initialGuess, const double value)

void	buildLOCAFactory ()
	Build LOCA Factory needed to support stepping strategy.

virtual LOCA::Abstract::Iterator::IteratorStatus	start ()
	Initialize iterator.

virtual LOCA::Abstract::Iterator::IteratorStatus	finish (LOCA::Abstract::Iterator::IteratorStatus iteratorStatus)
	Finalize iterator.

virtual LOCA::Abstract::Iterator::StepStatus	preprocess (LOCA::Abstract::Iterator::StepStatus stepStatus)
	Preprocess step.

virtual LOCA::Abstract::Iterator::StepStatus	adapt (LOCA::Abstract::Iterator::StepStatus stepStatus)
	Adaptation step.

virtual LOCA::Abstract::Iterator::StepStatus	compute (LOCA::Abstract::Iterator::StepStatus stepStatus)
	Compute step.

virtual LOCA::Abstract::Iterator::StepStatus	postprocess (LOCA::Abstract::Iterator::StepStatus stepStatus)
	Postprocess step.

LOCA::Abstract::Iterator::IteratorStatus	stop (LOCA::Abstract::Iterator::StepStatus stepStatus)
	Check stopping criteria.

virtual LOCA::Abstract::Iterator::IteratorStatus	iterate ()
	Perform iteration.

Teuchos::RCP < LOCA::MultiContinuation::AbstractGroup >	buildConstrainedGroup (const Teuchos::RCP< LOCA::MultiContinuation::AbstractGroup > &grp)
	Builds a constrained group is specified through parameter lists.

LOCA::Abstract::Iterator::StepStatus	computeStepSize (LOCA::Abstract::Iterator::StepStatus stepStatus, double &stepSize)
	Compute a new step size based on results from the previous step.

virtual void	printInitializationInfo ()
	Print to the screen the initialization information.

virtual void	printStartStep ()
	Print to the screen information for the beginning of a new continuation step.

virtual void	printRelaxationStep ()
	Print to the screen information for the beginning of a restart relaxation step.

virtual void	printEndStep (LOCA::Abstract::Iterator::StepStatus stepStatus)
	Print to the screen information for the end of a successful continuation step.

virtual void	printRelaxationEndStep (LOCA::Abstract::Iterator::StepStatus stepStatus)
	Print to the screen information for the end of a relaxation step.

virtual void	printEndInfo ()
	Print to the screen the concluding information.

virtual bool	withinThreshold ()
	Checks to see if continuation parameter is within threshold of bound.

Protected Member Functions inherited from LOCA::Abstract::Iterator
	Iterator ()
	Constructor.

virtual void	setLastIteration ()
	Set iterator status as LastIteration.

virtual bool	isLastIteration ()
	Returns true of the iteratorStatus is LastIteration.

virtual StepStatus	computeStepStatus (StepStatus preStatus, StepStatus compStatus, StepStatus postStatus)
	Compute step, iterator status from status of each component of step.

Protected Attributes
Teuchos::RCP < ::Thyra::AdaptiveSolutionManager >	mgr
	Adaptive solution manager provides interface to remesh/resize functions.

Teuchos::RCP< LOCA::GlobalData >	globalData
	Global data.

Teuchos::RCP < LOCA::Parameter::SublistParser >	parsedParams
	Parsed parameter list.

Teuchos::RCP < LOCA::MultiPredictor::AbstractStrategy >	predictor
	Predictor strategy.

Teuchos::RCP < LOCA::MultiContinuation::AbstractStrategy >	curGroupPtr
	Current continuation group.

Teuchos::RCP < LOCA::MultiContinuation::AbstractStrategy >	prevGroupPtr
	Continuation group from previous step.

Teuchos::RCP < LOCA::Eigensolver::AbstractStrategy >	eigensolver
	Eigensolver for computing eigenvalues after each continuation step.

Teuchos::RCP < LOCA::SaveEigenData::AbstractStrategy >	saveEigenData
	Strategy for saving eigenvectors/values.

Teuchos::RCP < LOCA::MultiContinuation::AbstractGroup >	bifGroupPtr
	Pointer to bifurcation group.

Teuchos::RCP < NOX::StatusTest::Generic >	noxStatusTestPtr
	Pointer to the NOX status test.

Teuchos::RCP < Teuchos::ParameterList >	paramListPtr
	Pointer to parameter list passed in constructor/reset method.

Teuchos::RCP < Teuchos::ParameterList >	stepperList
	Pointer to stepper parameters.

Teuchos::RCP < NOX::Solver::Generic >	solverPtr
	Solver (a.k.a corrector)

Teuchos::RCP < LOCA::MultiContinuation::ExtendedVector >	curPredictorPtr
	Current predictor direction.

Teuchos::RCP < LOCA::MultiContinuation::ExtendedVector >	prevPredictorPtr
	previous predictor direction

Teuchos::RCP < LOCA::StepSize::AbstractStrategy >	stepSizeStrategyPtr
	Step size control strategy.

Teuchos::RCP < Teuchos::ParameterList >	bifurcationParams
	Other parameter lists.

Teuchos::RCP < Teuchos::ParameterList >	firstStepperParams

std::string	conParamName
	Name of continuation parameter.

std::vector< int >	conParamIDs
	Index of continuation parameter.

double	startValue
	Starting value of continuation parameter, $\lambda_b$ .

double	maxValue
	Largest allowable value of continuation parameter.

double	minValue
	Smallest allowable value of continuation parameter.

double	stepSize
	Current step size (change in the continuation parameter), $\Delta \lambda_i$ .

int	maxNonlinearSteps
	Maximum number of Newton iterations per continuation step, $N_{max}$ . Defaults to 15.

double	targetValue
	Target parameter value for last step (either maxValue or minValue)

bool	isTargetStep
	Flag indicating if this is an extra step to hit target value.

bool	doTangentFactorScaling
	Flag indicating whether to do tangent factor step size scaling.

double	tangentFactor
	Tangent factor.

double	minTangentFactor
	Minimum tangent factor.

double	tangentFactorExponent
	Tangent factor exponent.

bool	calcEigenvalues
	Flag indicating whether to compute eigenvalues after each step.

bool	return_failed_on_max_steps
	Flag indicating whether to return failed upon reaching max steps.

bool	max_steps_exceeded
	Flag indicating that the failed step is only due to the maximum number of steps being exceeded.

Protected Attributes inherited from LOCA::Abstract::Iterator
int	stepNumber
	Current step number of continuation algorithm (does not include failed steps).

int	numFailedSteps
	Number of continuation steps that have failed.

int	numTotalSteps
	Total number of steps attempeted (includes failed and successful steps).

int	maxSteps
	Maximum number of continuation steps to take. Defaults to 100.

IteratorStatus	iteratorStatus
	Current status of the iterator.

Additional Inherited Members
Public Types inherited from LOCA::Abstract::Iterator
enum	IteratorStatus { LastIteration = 2, Finished = 1, Failed = 0, NotFinished = -1 }
	Enumerated type for status of the iterator. More...

enum	StepStatus { Successful = 1, Unsuccessful = 0, Provisional = -1 }
	Enumerated type for status of each step of iterator. More...

Detailed Description

Implementation of LOCA::Abstract::Iterator for computing points along a continuation curve.

The AdaptiveStepper class implements the pure virtual methods of the LOCA::Abstract::Iterator for iteratively computing points along a continuation curve.

Member Function Documentation

Teuchos::RCP< const LOCA::MultiContinuation::AbstractGroup > LOCA::AdaptiveStepper::getBifurcationGroup ( ) const

virtual

Return the current bifurcation group.

If the current bifurcation method is "None", then the returned group is the same as getSolutionGroup(), otherwise this method returns the current bifurcation group (e.g., a turning point group).

double LOCA::AdaptiveStepper::getContinuationParameter ( ) const

virtual

Return the current continuation parameter from the underlying LOCA::MultiContinuation::AbstractStrategy.

Teuchos::RCP< const NOX::Solver::Generic > LOCA::AdaptiveStepper::getSolver ( ) const

virtual

Return the current nonlinear solver pointer.

Will throw an error if the solver does not exist yet.

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

LOCA_AdaptiveStepper.H
LOCA_AdaptiveStepper.C

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation