Package org.moeaframework.problem.LSMOP

Class LSMOP

java.lang.Object

org.moeaframework.problem.LSMOP.LSMOP

All Implemented Interfaces:

AutoCloseable, Problem

Direct Known Subclasses:

LSMOP1, LSMOP2, LSMOP3, LSMOP4, LSMOP5, LSMOP6, LSMOP7, LSMOP8, LSMOP9

public abstract class LSMOP
extends Object
implements Problem

Abstract class for defining LSMOP test problems.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_N_k	The default number of subcomponents in each decision variable group.

Constructor Summary

Constructors

Constructor	Description
LSMOP(int M, int N_k, ShapeFunction g1, ShapeFunction g2, LinkageFunction linkage, CorrelationMatrix correlationMatrix, ParetoFrontGeometry geometry)	Constructs a new LSMOP problem instance.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes any underlying resources used by this problem.
void	evaluate(Solution solution)	Evaluates the solution, updating the solution's objectives in place.
String	getName()	Returns the user-friendly name for this problem.
int	getNumberOfConstraints()	Returns the number of constraints defined by this problem.
int	getNumberOfObjectives()	Returns the number of objectives defined by this problem.
int	getNumberOfVariables()	Returns the number of decision variables defined by this problem.
Solution	newSolution()	Returns a new solution for this problem.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.moeaframework.core.Problem

isType

Field Details

DEFAULT_N_k

public static final int DEFAULT_N_k

The default number of subcomponents in each decision variable group.

See Also:

• Constant Field Values

Constructor Details

LSMOP

public LSMOP(int M,
 int N_k,
 ShapeFunction g1,
 ShapeFunction g2,
 LinkageFunction linkage,
 CorrelationMatrix correlationMatrix,
 ParetoFrontGeometry geometry)

Constructs a new LSMOP problem instance.

Parameters:

M - the number of objectives

N_k - the number of subcomponents in each decision variable group

g1 - the first shape function (for even indices)

g2 - the second shape function (for odd indices)

linkage - the linkage function

correlationMatrix - the correlation matrix

geometry - the Pareto front geometry

Method Details

getNumberOfVariables

public int getNumberOfVariables()

Description copied from interface: Problem

Returns the number of decision variables defined by this problem.

Specified by:

getNumberOfVariables in interface Problem

Returns:

the number of decision variables defined by this problem

getNumberOfObjectives

public int getNumberOfObjectives()

Description copied from interface: Problem

Returns the number of objectives defined by this problem.

Specified by:

getNumberOfObjectives in interface Problem

Returns:

the number of objectives defined by this problem

getNumberOfConstraints

public int getNumberOfConstraints()

Description copied from interface: Problem

Returns the number of constraints defined by this problem.

Specified by:

getNumberOfConstraints in interface Problem

Returns:

the number of constraints defined by this problem

close

public void close()

Description copied from interface: Problem

Closes any underlying resources used by this problem. Once closed, further invocations of any methods on this problem may throw exceptions.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Problem

newSolution

public Solution newSolution()

Description copied from interface: Problem

Returns a new solution for this problem. Implementations must initialize the variables so that the valid range of values is defined, but typically leave the actual value at a default or undefined state.

Specified by:

newSolution in interface Problem

Returns:

a new solution for this problem

getName

public String getName()

Description copied from interface: Problem

Returns the user-friendly name for this problem.

Specified by:

getName in interface Problem

Returns:

the user-friendly name for this problem

evaluate

public void evaluate(Solution solution)

Description copied from interface: Problem

Evaluates the solution, updating the solution's objectives in place. Algorithms must explicitly call this method when appropriate to evaluate new solutions or reevaluate modified solutions.

Specified by:

evaluate in interface Problem

Parameters:

solution - the solution to be evaluated