#include <NOX_Solver_InexactTrustRegionBased.H>
Public Member Functions | |
InexactTrustRegionBased (const Teuchos::RCP< NOX::Abstract::Group > &grp, const Teuchos::RCP< NOX::StatusTest::Generic > &tests, const Teuchos::RCP< Teuchos::ParameterList > ¶ms) | |
Constructor. | |
virtual | ~InexactTrustRegionBased () |
Destructor. | |
virtual void | reset (const NOX::Abstract::Vector &initialGuess, const Teuchos::RCP< NOX::StatusTest::Generic > &tests) |
Resets the solver, sets a new status test, and sets a new initial guess. | |
virtual void | reset (const NOX::Abstract::Vector &initialGuess) |
Resets the solver and sets a new initial guess. | |
virtual NOX::StatusTest::StatusType | getStatus () |
Check current convergence and failure status. | |
virtual NOX::StatusTest::StatusType | step () |
Do one nonlinear step in the iteration sequence and return status. | |
virtual NOX::StatusTest::StatusType | solve () |
Solve the nonlinear problem and return final status. | |
virtual const NOX::Abstract::Group & | getSolutionGroup () const |
Return a reference to the current solution group. | |
virtual const NOX::Abstract::Group & | getPreviousSolutionGroup () const |
Return a reference to the previous solution group. | |
virtual int | getNumIterations () const |
Get number of iterations. | |
virtual const Teuchos::ParameterList & | getList () const |
Return a refernece to the solver parameters. | |
Protected Types | |
enum | TrustRegionType { Standard, Inexact } |
Type of Trust Region algorithm to use. More... | |
enum | InnerIterationReturnType { Converged, Unconverged, Failed } |
Return types for inner iteration status test. More... | |
enum | StepType { Newton, Cauchy, Dogleg } |
Enumerated list for each direction that may be required in the Trust region computation. More... | |
Protected Member Functions | |
virtual NOX::StatusTest::StatusType | iterateStandard () |
"Standard" trust region implementation | |
virtual NOX::StatusTest::StatusType | iterateInexact () |
"Inexact Trust Region" | |
virtual void | init () |
Print out initialization information and calcuation the RHS. | |
virtual void | printUpdate () |
Prints the current iteration information. | |
virtual void | invalid (const string ¶m, double value) const |
Print an error message and throw an error during parameter reads. | |
virtual void | throwError (const string &method, const string &mesage) const |
Print an error message and throw an error. | |
virtual void | resetCounters () |
Resets the counters in the solver. | |
NOX::StatusTest::StatusType | checkStep (const NOX::Abstract::Vector &step, double &radius) |
Check to see if the current step is acceptable. If not, it reduces the trust region radius accordingly. | |
virtual double | computeNorm (const NOX::Abstract::Vector &v) |
Computes the norm of a given vector. | |
Protected Attributes | |
TrustRegionType | method |
Type of trust region algorithm to use. | |
Teuchos::RCP< NOX::GlobalData > | globalDataPtr |
Pointer to the global data object. | |
Teuchos::RCP< NOX::Utils > | utils |
Utils. | |
InnerIterationReturnType | innerIterationStatus |
Current status of the trust region inner iteration. | |
Teuchos::RCP < NOX::Abstract::Group > | solnPtr |
Current solution. | |
Teuchos::RCP < NOX::Abstract::Group > | oldSolnPtr |
Previous solution pointer. | |
Teuchos::RCP < NOX::Abstract::Vector > | newtonVecPtr |
Current newton direction pointer. | |
Teuchos::RCP < NOX::Abstract::Vector > | cauchyVecPtr |
Current cauchy direction pointer. | |
Teuchos::RCP < NOX::Abstract::Vector > | rCauchyVecPtr |
Extra vector used in computations. | |
Teuchos::RCP < NOX::Abstract::Vector > | residualVecPtr |
Extra vector used in computations. | |
Teuchos::RCP < NOX::Abstract::Vector > | aVecPtr |
Extra vector used in computations. | |
Teuchos::RCP < NOX::Abstract::Vector > | bVecPtr |
Extra vector used in computations. | |
Teuchos::RCP < NOX::StatusTest::Generic > | testPtr |
Stopping test. | |
Teuchos::RCP < Teuchos::ParameterList > | paramsPtr |
Input parameters. | |
NOX::Direction::Utils::InexactNewton | inNewtonUtils |
Inexact Newton utitilities. | |
Teuchos::RCP < NOX::Direction::Generic > | newtonPtr |
Newton Search Direction. | |
Teuchos::RCP < NOX::Direction::Generic > | cauchyPtr |
Cauchy Search Direction. | |
double | radius |
Radius of the trust region. | |
double | minRatio |
Minimum improvement ratio to accept step. | |
double | minRadius |
Minimum trust region radius. | |
double | maxRadius |
Maximum trust region radius. | |
double | contractTriggerRatio |
ratio < alpha triggers contraction | |
double | expandTriggerRatio |
ratio > beta triggers expansion | |
double | expandFactor |
Expansion factor. | |
double | contractFactor |
Constraction factor. | |
double | recoveryStep |
double | newF |
Value of ![]() | |
double | oldF |
Value of ![]() | |
double | dx |
norm(xnew - xold) | |
int | nIter |
Number of nonlinear iterations. | |
double | eta |
Current linear solve tolerance (inexact only). | |
double | eta_last |
Linear solve tolerance used in last iteration (inexact only). | |
NOX::StatusTest::StatusType | status |
Status of nonlinear solver. | |
NOX::StatusTest::CheckType | checkType |
Type of check to use for status tests. See NOX::StatusTest for more details. | |
StepType | stepType |
Type of step to be taken. | |
Teuchos::RCP < NOX::MeritFunction::Generic > | meritFuncPtr |
Stores merit function supplied by global data. | |
bool | useCauchyInNewtonDirection |
If set to true, the initial guess for the Newton direction computation will use the Cauchy direction as the initial guess. | |
bool | writeOutputParamsToList |
If set to true, statistics/counters will be output to the output list. | |
bool | useCounters |
If set to true, counters will be stored by the solver. | |
int | numCauchySteps |
Counter for the number of cauchy steps taken. | |
int | numNewtonSteps |
Counter for the number of Newton steps taken. | |
int | numDoglegSteps |
Counter for the number of Dogleg steps taken. | |
int | numTrustRegionInnerIterations |
Number of inner iterations required to adjust the trust region radius. | |
double | sumDoglegFracCauchyToNewton |
Hold the sum of the value of the fraction a dogleg step took between the Cauchy and Newton directions. This is the ![]() ![]() | |
double | sumDoglegFracNewtonLength |
Holds the sum of the values of the fraction a dogleg step took compared to the full Newton step. The fractional value is computed as ![]() | |
bool | useAredPredRatio |
If set to true, the minimum improvement ratio condition uses an Ared/Pred approach. | |
bool | useDoglegMinimization |
If set to true, the ![]() | |
NOX::Solver::PrePostOperator | prePostOperator |
Pointer to a user defined NOX::Abstract::PrePostOperator object. |
Our goal is to solve: where
. Alternatively, we might say that we wish to solve
The trust region subproblem (TRSP) at iteration is given by
where
The "improvement ratio" for a given step is defined as
An iteration consists of the following steps.
Input Paramters
The following parameters should be specified in the "Trust Region" sublist based to the solver.
Output Paramters
A sublist called "Output" will be created at the top level of the parameter list and contain the following general solver parameters:
A sublist called "Output" will be created in the "Trust Region" sublist and contain the following trust region specific output parameters:
Definition at line 278 of file NOX_Solver_InexactTrustRegionBased.H.
enum NOX::Solver::InexactTrustRegionBased::TrustRegionType [protected] |
Type of Trust Region algorithm to use.
Standard | Basic trust region method for nonlinear systems (Nocedal and Wright?). |
Inexact | Inexact Trust region WITHOUT minimization of the local linear model over the line segments. |
Definition at line 339 of file NOX_Solver_InexactTrustRegionBased.H.
enum NOX::Solver::InexactTrustRegionBased::InnerIterationReturnType [protected] |
Return types for inner iteration status test.
Converged | Converged. |
Unconverged | Unconverged. |
Failed | Failed by hitting minimum radius bound. |
Definition at line 350 of file NOX_Solver_InexactTrustRegionBased.H.
enum NOX::Solver::InexactTrustRegionBased::StepType [protected] |
Enumerated list for each direction that may be required in the Trust region computation.
Newton | Use the Newton direction. |
Cauchy | Use the Cauchy direction. |
Dogleg | Use the doglog direction. |
Definition at line 459 of file NOX_Solver_InexactTrustRegionBased.H.
NOX::Solver::InexactTrustRegionBased::InexactTrustRegionBased | ( | const Teuchos::RCP< NOX::Abstract::Group > & | grp, | |
const Teuchos::RCP< NOX::StatusTest::Generic > & | tests, | |||
const Teuchos::RCP< Teuchos::ParameterList > & | params | |||
) |
Constructor.
See reset() for description.
Definition at line 62 of file NOX_Solver_InexactTrustRegionBased.C.
References NOX::DeepCopy, init(), and NOX::ShapeCopy.
NOX::Solver::InexactTrustRegionBased::~InexactTrustRegionBased | ( | ) | [virtual] |
void NOX::Solver::InexactTrustRegionBased::reset | ( | const NOX::Abstract::Vector & | initial_guess, | |
const Teuchos::RCP< NOX::StatusTest::Generic > & | test | |||
) | [virtual] |
Resets the solver, sets a new status test, and sets a new initial guess.
Implements NOX::Solver::Generic.
Definition at line 243 of file NOX_Solver_InexactTrustRegionBased.C.
References checkType, dx, NOX::Utils::fill(), meritFuncPtr, newF, nIter, NOX::Utils::Parameters, paramsPtr, resetCounters(), solnPtr, status, testPtr, NOX::StatusTest::Unconverged, useCounters, and utils.
void NOX::Solver::InexactTrustRegionBased::reset | ( | const NOX::Abstract::Vector & | initial_guess | ) | [virtual] |
Resets the solver and sets a new initial guess.
Implements NOX::Solver::Generic.
Definition at line 281 of file NOX_Solver_InexactTrustRegionBased.C.
References checkType, dx, NOX::Utils::fill(), meritFuncPtr, newF, nIter, NOX::Utils::Parameters, paramsPtr, resetCounters(), solnPtr, status, testPtr, NOX::StatusTest::Unconverged, useCounters, and utils.
NOX::StatusTest::StatusType NOX::Solver::InexactTrustRegionBased::getStatus | ( | ) | [virtual] |
Check current convergence and failure status.
Implements NOX::Solver::Generic.
Definition at line 316 of file NOX_Solver_InexactTrustRegionBased.C.
References status.
NOX::StatusTest::StatusType NOX::Solver::InexactTrustRegionBased::step | ( | ) | [virtual] |
Do one nonlinear step in the iteration sequence and return status.
Implements NOX::Solver::Generic.
Definition at line 324 of file NOX_Solver_InexactTrustRegionBased.C.
References checkType, Inexact, iterateInexact(), iterateStandard(), meritFuncPtr, method, newF, nIter, prePostOperator, printUpdate(), NOX::Solver::PrePostOperator::runPostIterate(), NOX::Solver::PrePostOperator::runPreIterate(), solnPtr, Standard, status, testPtr, and NOX::StatusTest::Unconverged.
Referenced by iterateInexact(), iterateStandard(), and solve().
NOX::StatusTest::StatusType NOX::Solver::InexactTrustRegionBased::solve | ( | ) | [virtual] |
Solve the nonlinear problem and return final status.
By "solve", we call iterate() until the NOX::StatusTest value is either NOX::StatusTest::Converged or NOX::StatusTest::Failed.
Implements NOX::Solver::Generic.
Definition at line 1009 of file NOX_Solver_InexactTrustRegionBased.C.
References nIter, numCauchySteps, numDoglegSteps, numNewtonSteps, numTrustRegionInnerIterations, paramsPtr, prePostOperator, NOX::Solver::PrePostOperator::runPostSolve(), NOX::Solver::PrePostOperator::runPreSolve(), solnPtr, status, step(), sumDoglegFracCauchyToNewton, sumDoglegFracNewtonLength, NOX::StatusTest::Unconverged, useCounters, and writeOutputParamsToList.
const Abstract::Group & NOX::Solver::InexactTrustRegionBased::getSolutionGroup | ( | ) | const [virtual] |
Return a reference to the current solution group.
Implements NOX::Solver::Generic.
Definition at line 1047 of file NOX_Solver_InexactTrustRegionBased.C.
References solnPtr.
const Abstract::Group & NOX::Solver::InexactTrustRegionBased::getPreviousSolutionGroup | ( | ) | const [virtual] |
Return a reference to the previous solution group.
Implements NOX::Solver::Generic.
Definition at line 1056 of file NOX_Solver_InexactTrustRegionBased.C.
References oldSolnPtr.
int NOX::Solver::InexactTrustRegionBased::getNumIterations | ( | ) | const [virtual] |
Get number of iterations.
Implements NOX::Solver::Generic.
Definition at line 1064 of file NOX_Solver_InexactTrustRegionBased.C.
References nIter.
const Teuchos::ParameterList & NOX::Solver::InexactTrustRegionBased::getList | ( | ) | const [virtual] |
Return a refernece to the solver parameters.
Implements NOX::Solver::Generic.
Definition at line 1073 of file NOX_Solver_InexactTrustRegionBased.C.
References paramsPtr.
NOX::StatusTest::StatusType NOX::Solver::InexactTrustRegionBased::iterateStandard | ( | ) | [protected, virtual] |
"Standard" trust region implementation
Definition at line 366 of file NOX_Solver_InexactTrustRegionBased.C.
References aVecPtr, bVecPtr, Cauchy, cauchyPtr, cauchyVecPtr, NOX::StatusTest::Generic::checkStatus(), checkType, NOX::Abstract::Group::computeF(), computeNorm(), NOX::Abstract::Group::computeX(), contractFactor, contractTriggerRatio, NOX::Utils::Details, Dogleg, dx, expandFactor, expandTriggerRatio, NOX::StatusTest::Failed, NOX::Utils::fill(), NOX::Utils::InnerIteration, NOX::Abstract::Vector::innerProduct(), maxRadius, meritFuncPtr, minRadius, minRatio, newF, Newton, newtonPtr, newtonVecPtr, nIter, numCauchySteps, numDoglegSteps, numNewtonSteps, numTrustRegionInnerIterations, NOX::Abstract::Group::Ok, oldF, oldSolnPtr, radius, recoveryStep, solnPtr, status, step(), stepType, sumDoglegFracCauchyToNewton, sumDoglegFracNewtonLength, testPtr, NOX::StatusTest::Unconverged, useAredPredRatio, useCounters, and utils.
Referenced by step().
NOX::StatusTest::StatusType NOX::Solver::InexactTrustRegionBased::iterateInexact | ( | ) | [protected, virtual] |
"Inexact Trust Region"
Definition at line 666 of file NOX_Solver_InexactTrustRegionBased.C.
References NOX::Abstract::Group::applyJacobian(), NOX::Abstract::Group::applyJacobianInverse(), aVecPtr, bVecPtr, Cauchy, cauchyPtr, cauchyVecPtr, NOX::StatusTest::Generic::checkStatus(), checkType, NOX::Abstract::Group::computeF(), NOX::Direction::Utils::InexactNewton::computeForcingTerm(), NOX::Abstract::Group::computeJacobian(), computeNorm(), NOX::Abstract::Group::computeX(), contractFactor, contractTriggerRatio, Converged, NOX::Utils::Details, Dogleg, eta, eta_last, expandFactor, expandTriggerRatio, Failed, NOX::StatusTest::Failed, NOX::Utils::fill(), NOX::Abstract::Group::getF(), NOX::Abstract::Vector::init(), NOX::Utils::InnerIteration, innerIterationStatus, NOX::Abstract::Vector::innerProduct(), inNewtonUtils, NOX::Abstract::Group::isJacobian(), maxRadius, meritFuncPtr, minRadius, minRatio, newF, Newton, newtonVecPtr, nIter, numCauchySteps, numDoglegSteps, numNewtonSteps, numTrustRegionInnerIterations, NOX::Abstract::Group::Ok, oldF, oldSolnPtr, paramsPtr, radius, rCauchyVecPtr, recoveryStep, residualVecPtr, NOX::Abstract::Vector::scale(), solnPtr, status, step(), stepType, sumDoglegFracCauchyToNewton, sumDoglegFracNewtonLength, testPtr, throwError(), Unconverged, NOX::StatusTest::Unconverged, NOX::Abstract::Vector::update(), useAredPredRatio, useCauchyInNewtonDirection, useCounters, useDoglegMinimization, and utils.
Referenced by step().
void NOX::Solver::InexactTrustRegionBased::init | ( | ) | [protected, virtual] |
Print out initialization information and calcuation the RHS.
Definition at line 108 of file NOX_Solver_InexactTrustRegionBased.C.
References cauchyPtr, checkType, contractFactor, contractTriggerRatio, dx, expandFactor, expandTriggerRatio, NOX::Utils::fill(), globalDataPtr, Inexact, inNewtonUtils, invalid(), maxRadius, method, minRadius, minRatio, newtonPtr, nIter, NOX::Utils::Parameters, paramsPtr, NOX::Solver::parseStatusTestCheckType(), recoveryStep, NOX::Direction::Utils::InexactNewton::reset(), resetCounters(), Standard, status, NOX::StatusTest::Unconverged, useAredPredRatio, useCauchyInNewtonDirection, useCounters, useDoglegMinimization, and utils.
Referenced by InexactTrustRegionBased().
void NOX::Solver::InexactTrustRegionBased::printUpdate | ( | ) | [protected, virtual] |
Prints the current iteration information.
Definition at line 1082 of file NOX_Solver_InexactTrustRegionBased.C.
References NOX::StatusTest::Converged, dx, NOX::StatusTest::Failed, NOX::Utils::fill(), NOX::Abstract::Vector::MaxNorm, newF, nIter, NOX::Utils::OuterIteration, NOX::Utils::OuterIterationStatusTest, radius, solnPtr, status, testPtr, NOX::StatusTest::Unconverged, and utils.
Referenced by step().
void NOX::Solver::InexactTrustRegionBased::invalid | ( | const string & | param, | |
double | value | |||
) | const [protected, virtual] |
Print an error message and throw an error during parameter reads.
Definition at line 219 of file NOX_Solver_InexactTrustRegionBased.C.
References utils.
Referenced by init().
void NOX::Solver::InexactTrustRegionBased::throwError | ( | const string & | method, | |
const string & | mesage | |||
) | const [protected, virtual] |
Print an error message and throw an error.
Definition at line 231 of file NOX_Solver_InexactTrustRegionBased.C.
References utils.
Referenced by iterateInexact().
void NOX::Solver::InexactTrustRegionBased::resetCounters | ( | ) | [protected, virtual] |
Resets the counters in the solver.
Definition at line 1120 of file NOX_Solver_InexactTrustRegionBased.C.
References numCauchySteps, numDoglegSteps, numNewtonSteps, numTrustRegionInnerIterations, sumDoglegFracCauchyToNewton, and sumDoglegFracNewtonLength.
NOX::StatusTest::StatusType NOX::Solver::InexactTrustRegionBased::checkStep | ( | const NOX::Abstract::Vector & | step, | |
double & | radius | |||
) | [protected] |
Check to see if the current step is acceptable. If not, it reduces the trust region radius accordingly.
Definition at line 1000 of file NOX_Solver_InexactTrustRegionBased.C.
References NOX::StatusTest::Converged.
double NOX::Solver::InexactTrustRegionBased::computeNorm | ( | const NOX::Abstract::Vector & | v | ) | [protected, virtual] |
Computes the norm of a given vector.
Defaults to the L-2 norm but could use a user defined norm also.
Definition at line 1135 of file NOX_Solver_InexactTrustRegionBased.C.
References NOX::Abstract::Vector::norm().
Referenced by iterateInexact(), and iterateStandard().
Type of trust region algorithm to use.
Definition at line 347 of file NOX_Solver_InexactTrustRegionBased.H.
Teuchos::RCP<NOX::GlobalData> NOX::Solver::InexactTrustRegionBased::globalDataPtr [protected] |
Pointer to the global data object.
Definition at line 360 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init().
Teuchos::RCP<NOX::Utils> NOX::Solver::InexactTrustRegionBased::utils [protected] |
Definition at line 363 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), invalid(), iterateInexact(), iterateStandard(), printUpdate(), reset(), and throwError().
Current status of the trust region inner iteration.
Definition at line 366 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact().
Teuchos::RCP<NOX::Abstract::Group> NOX::Solver::InexactTrustRegionBased::solnPtr [protected] |
Current solution.
Definition at line 369 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by getSolutionGroup(), iterateInexact(), iterateStandard(), printUpdate(), reset(), solve(), and step().
Teuchos::RCP<NOX::Abstract::Group> NOX::Solver::InexactTrustRegionBased::oldSolnPtr [protected] |
Previous solution pointer.
Definition at line 372 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by getPreviousSolutionGroup(), iterateInexact(), and iterateStandard().
Teuchos::RCP<NOX::Abstract::Vector> NOX::Solver::InexactTrustRegionBased::newtonVecPtr [protected] |
Current newton direction pointer.
Definition at line 375 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), and iterateStandard().
Teuchos::RCP<NOX::Abstract::Vector> NOX::Solver::InexactTrustRegionBased::cauchyVecPtr [protected] |
Current cauchy direction pointer.
Definition at line 378 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), and iterateStandard().
Teuchos::RCP<NOX::Abstract::Vector> NOX::Solver::InexactTrustRegionBased::rCauchyVecPtr [protected] |
Extra vector used in computations.
Definition at line 381 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact().
Teuchos::RCP<NOX::Abstract::Vector> NOX::Solver::InexactTrustRegionBased::residualVecPtr [protected] |
Extra vector used in computations.
Definition at line 384 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact().
Teuchos::RCP<NOX::Abstract::Vector> NOX::Solver::InexactTrustRegionBased::aVecPtr [protected] |
Extra vector used in computations.
Definition at line 387 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), and iterateStandard().
Teuchos::RCP<NOX::Abstract::Vector> NOX::Solver::InexactTrustRegionBased::bVecPtr [protected] |
Extra vector used in computations.
Definition at line 390 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), and iterateStandard().
Teuchos::RCP<NOX::StatusTest::Generic> NOX::Solver::InexactTrustRegionBased::testPtr [protected] |
Stopping test.
Definition at line 393 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), printUpdate(), reset(), and step().
Teuchos::RCP<Teuchos::ParameterList> NOX::Solver::InexactTrustRegionBased::paramsPtr [protected] |
Input parameters.
Definition at line 396 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by getList(), init(), iterateInexact(), reset(), and solve().
NOX::Direction::Utils::InexactNewton NOX::Solver::InexactTrustRegionBased::inNewtonUtils [protected] |
Inexact Newton utitilities.
Definition at line 399 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), and iterateInexact().
Teuchos::RCP<NOX::Direction::Generic> NOX::Solver::InexactTrustRegionBased::newtonPtr [protected] |
Newton Search Direction.
Definition at line 402 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), and iterateStandard().
Teuchos::RCP<NOX::Direction::Generic> NOX::Solver::InexactTrustRegionBased::cauchyPtr [protected] |
Cauchy Search Direction.
Definition at line 405 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::radius [protected] |
Radius of the trust region.
Definition at line 408 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), and printUpdate().
double NOX::Solver::InexactTrustRegionBased::minRatio [protected] |
Minimum improvement ratio to accept step.
Definition at line 411 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::minRadius [protected] |
Minimum trust region radius.
Definition at line 414 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::maxRadius [protected] |
Maximum trust region radius.
Definition at line 417 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::contractTriggerRatio [protected] |
ratio < alpha triggers contraction
Definition at line 420 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::expandTriggerRatio [protected] |
ratio > beta triggers expansion
Definition at line 423 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::expandFactor [protected] |
Expansion factor.
Definition at line 426 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::contractFactor [protected] |
Constraction factor.
Definition at line 429 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::recoveryStep [protected] |
Take a step of this length in the Newton direction if the trust-region search fails
Definition at line 433 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::newF [protected] |
Value of at current solution.
Definition at line 436 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), printUpdate(), reset(), and step().
double NOX::Solver::InexactTrustRegionBased::oldF [protected] |
Value of at previous solution.
Definition at line 438 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), and iterateStandard().
double NOX::Solver::InexactTrustRegionBased::dx [protected] |
norm(xnew - xold)
Definition at line 441 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateStandard(), printUpdate(), and reset().
int NOX::Solver::InexactTrustRegionBased::nIter [protected] |
Number of nonlinear iterations.
Definition at line 444 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by getNumIterations(), init(), iterateInexact(), iterateStandard(), printUpdate(), reset(), solve(), and step().
double NOX::Solver::InexactTrustRegionBased::eta [protected] |
Current linear solve tolerance (inexact only).
Definition at line 447 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact().
double NOX::Solver::InexactTrustRegionBased::eta_last [protected] |
Linear solve tolerance used in last iteration (inexact only).
Definition at line 450 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact().
Status of nonlinear solver.
Definition at line 453 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by getStatus(), init(), iterateInexact(), iterateStandard(), printUpdate(), reset(), solve(), and step().
Type of check to use for status tests. See NOX::StatusTest for more details.
Definition at line 456 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), iterateStandard(), reset(), and step().
Type of step to be taken.
Definition at line 470 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), and iterateStandard().
Teuchos::RCP<NOX::MeritFunction::Generic> NOX::Solver::InexactTrustRegionBased::meritFuncPtr [protected] |
Stores merit function supplied by global data.
Definition at line 473 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), reset(), and step().
bool NOX::Solver::InexactTrustRegionBased::useCauchyInNewtonDirection [protected] |
If set to true, the initial guess for the Newton direction computation will use the Cauchy direction as the initial guess.
Definition at line 476 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), and iterateInexact().
bool NOX::Solver::InexactTrustRegionBased::writeOutputParamsToList [protected] |
If set to true, statistics/counters will be output to the output list.
Definition at line 479 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by solve().
bool NOX::Solver::InexactTrustRegionBased::useCounters [protected] |
If set to true, counters will be stored by the solver.
Definition at line 482 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), iterateStandard(), reset(), and solve().
int NOX::Solver::InexactTrustRegionBased::numCauchySteps [protected] |
Counter for the number of cauchy steps taken.
Definition at line 485 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), resetCounters(), and solve().
int NOX::Solver::InexactTrustRegionBased::numNewtonSteps [protected] |
Counter for the number of Newton steps taken.
Definition at line 488 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), resetCounters(), and solve().
int NOX::Solver::InexactTrustRegionBased::numDoglegSteps [protected] |
Counter for the number of Dogleg steps taken.
Definition at line 491 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), resetCounters(), and solve().
Number of inner iterations required to adjust the trust region radius.
Definition at line 494 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), resetCounters(), and solve().
double NOX::Solver::InexactTrustRegionBased::sumDoglegFracCauchyToNewton [protected] |
Hold the sum of the value of the fraction a dogleg step took between the Cauchy and Newton directions. This is the variable in the standard dogleg algorithm and the
parameter in the inexact dogleg algorithm. A value of 0.0 is a full step in the Cauchy direction and a value of 1.0 is a full step in the Newton direction.
Definition at line 497 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), resetCounters(), and solve().
double NOX::Solver::InexactTrustRegionBased::sumDoglegFracNewtonLength [protected] |
Holds the sum of the values of the fraction a dogleg step took compared to the full Newton step. The fractional value is computed as .
Definition at line 500 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by iterateInexact(), iterateStandard(), resetCounters(), and solve().
bool NOX::Solver::InexactTrustRegionBased::useAredPredRatio [protected] |
If set to true, the minimum improvement ratio condition uses an Ared/Pred approach.
Definition at line 503 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), iterateInexact(), and iterateStandard().
bool NOX::Solver::InexactTrustRegionBased::useDoglegMinimization [protected] |
If set to true, the parameter is minimized over the dogleg line segments instead of being computed at the trust regioin radius.
Definition at line 506 of file NOX_Solver_InexactTrustRegionBased.H.
Referenced by init(), and iterateInexact().
Pointer to a user defined NOX::Abstract::PrePostOperator object.
Definition at line 509 of file NOX_Solver_InexactTrustRegionBased.H.