genopt.algorithm

Class PSOCCMesh

java.lang.Object

genopt.algorithm.Optimizer

genopt.algorithm.util.pso.ModelPSO

genopt.algorithm.PSOCC

genopt.algorithm.PSOCCMesh

Direct Known Subclasses:

GPSPSOCCHJ

public class PSOCCMesh
extends PSOCC

Class for minimizing a function using a mesh particle swarm optimization algorithm with constriction coefficient for the particle location update equation.

This project was carried out at:

• Lawrence Berkeley National Laboratory (LBNL), Simulation Research Group,

and supported by

• the U.S. Department of Energy (DOE),
• the Swiss Academy of Engineering Sciences (SATW),
• the Swiss National Energy Fund (NEFF), and
• the Swiss National Science Foundation (SNSF)

GenOpt Copyright (c) 1998-2021, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from the U.S. Dept. of Energy). All rights reserved.

Version:

GenOpt(R) 3.1.1 (March 24, 2016)

Author:

Michael Wetter

Field Summary

Fields

Modifier and Type	Field and Description
private double[]	Delta Mesh size factor
private int	IniMesSizExp The initial mesh size exponent 's_k'
private int	MesSizDiv The mesh size divider 'r'
protected double[]	X0Con Initial values of the continuous parameters

Fields inherited from class genopt.algorithm.util.pso.ModelPSO

CogAcc, CurPop, dimCon, dimDis, dimF, GloBes, IGen, LenBitStr, LocBes, MaxVelDis, NumGen, NumPar, RanGen, SocAcc, VelCon, VelDis, VelMaxCon

Fields inherited from class genopt.algorithm.Optimizer

done, EXCLUDING, FS, INCLUDING, LS, MAINITERATION, ORIGINAL, SUBITERATION, TRANSFORMED

Constructor Summary

Constructors

Constructor and Description
PSOCCMesh(GenOpt genOptData) Constructor

Method Summary

Modifier and Type	Method and Description
Point[]	getF(Point[] x, boolean stopAtError) Evaluates the simulation based on the parameter set x The value constraints determines in which mode the constraints are treated After this call, the parameters in the original and in the transformed space are set to the values that correspond to x The step size in the transformed space is updated according to the transformation function A new input file is writen the simulation is launched simulation errors are checked the value of the objective function is returned
protected int	getInitialMeshSizeExponent() Gets the initial mesh size exponent.
protected int	getMeshSizeDivider() Gets the mesh size divider.

Methods inherited from class genopt.algorithm.PSOCC

setConstrictionCoefficientParameter, updateVelocity

Methods inherited from class genopt.algorithm.util.pso.ModelPSO

clampVelocity, run

Methods inherited from class genopt.algorithm.Optimizer

algorithmRequiresUsageOfStepNumber, appendToOutputListing, checkMaxIteration, checkObjectiveFunctionValue, ensureOnlyContinuousParameters, ensureOnlyDiscreteParameters, getAbsAccuracyFunction, getDimensionContinuous, getDimensionDiscrete, getDimensionF, getDimensionX, getDiscreteValueDouble0, getDx, getDx0, getF, getIndex0, getIndex0, getInputValueBoolean, getInputValueDouble, getInputValueDouble, getInputValueInteger, getInputValueInteger, getInputValueString, getInputValueString, getKindOfConstraint, getL, getLengthDiscrete, getMainIterationNumber, getMaximumThreadPoolSize, getMaxIterationNumber, getMinimumPoint, getMode, getObjectiveFunctionName, getOutputPath, getPointerToEqualPoints, getRelAccuracyFunction, getSimulationNumber, getStepNumber, getU, getVariableNameContinuous, getVariableNameDiscrete, getX0, getX0, goToEndOfCommandFile, increaseStepNumber, increaseStepNumber, isFeasible, isNextToken, maxIterationReached, mustStopOptimization, print, println, replace, report, reportCurrentLowestPoint, reportMinimum, resetStepNumber, roundCoordinates, run, setInfo, setMode, setNumberOfMatchingResults, setToFeasibleCoordinate, setToFeasibleCoordinate, setWarning, simulate, throwInputError, useStepNumber, writeStepNumber

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

X0Con

protected double[] X0Con

Initial values of the continuous parameters

MesSizDiv

private int MesSizDiv

The mesh size divider 'r'

IniMesSizExp

private int IniMesSizExp

The initial mesh size exponent 's_k'

Delta

private double[] Delta

Mesh size factor

Constructor Detail

PSOCCMesh

public PSOCCMesh(GenOpt genOptData)
          throws OptimizerException,
                 java.io.IOException,
                 java.lang.Exception,
                 InputFormatException

Constructor

Parameters:

genOptData - a reference to the GenOpt object.
Note: the object is used as a reference. Hence, the data of GenOpt are modified by this Class.

Throws:

OptimizerException - if an OptimizerException occurs or if the user required to stop GenOpt

SimulationInputException - if an error in writing the simulation input file occurs

java.lang.NoSuchMethodException - if a method that should be invoked could not be found

java.lang.IllegalAccessException - if an invoked method enforces Java language access control and the underlying method is inaccessible

InvocationTargetException - if an invoked method throws an exception

java.lang.Exception - if an I/O error in the simulation input file occurs

java.io.IOException

InputFormatException

Method Detail

getF

public Point[] getF(Point[] x,
                    boolean stopAtError)
             throws SimulationInputException,
                    OptimizerException,
                    java.lang.NoSuchMethodException,
                    java.lang.IllegalAccessException,
                    java.lang.Exception

Evaluates the simulation based on the parameter set x
The value constraints determines in which mode the constraints are treated

• After this call, the parameters in the original and in the transformed space are set to the values that correspond to x
• The step size in the transformed space is updated according to the transformation function
• A new input file is writen
• the simulation is launched
• simulation errors are checked
• the value of the objective function is returned

Overrides:

getF in class Optimizer

Parameters:

x - the points to be evaluated

stopAtError - set to false to continue with function evaluations even if there was an error

Returns:

a clone of the points with the new function values stored

Throws:

OptimizerException - if an OptimizerException occurs or if the user required to stop GenOpt

SimulationInputException - if an error in writing the simulation input file occurs

java.lang.NoSuchMethodException - if a method that should be invoked could not be found

java.lang.IllegalAccessException - if an invoked method enforces Java language access control and the underlying method is inaccessible

InvocationTargetException - if an invoked method throws an exception

java.lang.Exception - if an I/O error in the simulation input file occurs

getMeshSizeDivider

protected final int getMeshSizeDivider()

Gets the mesh size divider.

Returns:

the mesh size divider

getInitialMeshSizeExponent

protected final int getInitialMeshSizeExponent()

Gets the initial mesh size exponent.

Returns:

the initial mesh size exponent