CORE constraints handling meta-algorithm. More...

#include <cstrs_core.h>

Inheritance diagram for pagmo::algorithm::cstrs_core:

Public Member Functions
	cstrs_core (const base &=jde(1), const base &=jde(1), int=1, int=10, double=1., double=1e-15, double=1e-15)
	Constructor. More...

	cstrs_core (const cstrs_core &)
	Copy constructor.

base_ptr	clone () const
	Clone method.

void	evolve (population &) const
	Evolve implementation. More...

std::string	get_name () const
	Algorithm name.

base_ptr	get_algorithm () const
	Get a copy of the internal local algorithm. More...

void	set_algorithm (const base &)
	Set algorithm. More...

base_ptr	get_repair_algorithm () const
	Get a copy of the internal local repair algorithm. More...

void	set_repair_algorithm (const base &)
	Set algorithm. More...

Public Member Functions inherited from pagmo::algorithm::base
	base ()
	Default constructor. More...

virtual	~base ()
	Trivial destructor. More...

std::string	human_readable () const
	Return human readable representation of the algorithm. More...

void	set_screen_output (const bool p)
	Setter-Getter for protected m_screen_output data. More...

bool	get_screen_output () const
	Gets screen output. More...

void	reset_rngs (const unsigned int) const
	Resets the seed of the internal rngs using a user-provided seed. More...

Protected Member Functions
std::string	human_readable_extra () const
	Extra human readable algorithm info. More...

Friends
class	boost::serialization::access

Additional Inherited Members
Protected Attributes inherited from pagmo::algorithm::base
bool	m_screen_output
	Indicates to the derived class whether to print stuff on screen.

rng_double	m_drng
	Random number generator for double-precision floating point values.

rng_uint32	m_urng
	Random number generator for unsigned integer values.

unsigned int	m_fevals
	A counter for the number of function evaluations.

Detailed Description

CORE constraints handling meta-algorithm.

CORE is a meta-algorithm that allow to solve constrained optimization problems. The key idea of this constraint handling technique is to repair infeasible individuals of the population at fixed intervals.

The original algorithm is using a random evolutionary search algorithm. This implementation is extended to be used with any algorithm.

This meta-algorithm is based on the population population::repair() method.

See also: Belur, S.V. CORE: Constrained optimization by random evolution, Late Breaking Papers at the Genetic Programming Conference, Stanford University, 280-286, 1997.

Author: Jeremie Labroquere (jerem.nosp@m.ie.l.nosp@m.abroq.nosp@m.uere.nosp@m.@gmai.nosp@m.l.co.nosp@m.m)

Definition at line 57 of file cstrs_core.h.

Constructor & Destructor Documentation

pagmo::algorithm::cstrs_core::cstrs_core	(	const base &	original_algo = `jde(1)`,
		const base &	repair_algo = `jde(1)`,
		int	gen = `1`,
		int	repair_frequency = `10`,
		double	repair_ratio = `1.`,
		double	ftol = `1e-15`,
		double	xtol = `1e-15`
	)

Constructor.

Constructs a CORE constraints handling algorithm

Parameters

[in]	original_algo	pagmo::algorithm to use as 'original' optimization method. Its number of generations should be set to 1.
[in]	repair_algo	pagmo::algorithm to use as 'repairing' optimization algorithm. It should be able to deal with population of size 1.
[in]	gen	number of generations.
[in]	repair_frequency	The infeasible are repaired at each repair frequency generations.
[in]	repair_ratio	It the repair ratio is the ratio of repaired individuals over infeasible ones (a ratio of 1 will repair all the individuals).
[in]	ftol	stopping criteria on the f tolerance.
[in]	xtol	stopping criteria on the x tolerance.

Exceptions

value_error if gen is negative, if repair frequency is negative.

Definition at line 58 of file cstrs_core.cpp.

Member Function Documentation

void pagmo::algorithm::cstrs_core::evolve ( population & pop ) const

virtual

Evolve implementation.

Run the CORE algorithm

Parameters

[in,out] pop input/output pagmo::population to be evolved.

Implements pagmo::algorithm::base.

Definition at line 103 of file cstrs_core.cpp.

base_ptr pagmo::algorithm::cstrs_core::get_algorithm ( ) const

Get a copy of the internal local algorithm.

Returns: algorithm::base_ptr to a copy of the internal local algorithm.

Definition at line 227 of file cstrs_core.cpp.

base_ptr pagmo::algorithm::cstrs_core::get_repair_algorithm ( ) const

Get a copy of the internal local repair algorithm.

Returns: algorithm::base_ptr to a copy of the internal local repair algorithm.

Definition at line 247 of file cstrs_core.cpp.

std::string pagmo::algorithm::cstrs_core::human_readable_extra ( ) const

protectedvirtual

Extra human readable algorithm info.

Returns: a formatted string displaying the parameters of the algorithm.

Reimplemented from pagmo::algorithm::base.

Definition at line 267 of file cstrs_core.cpp.

void pagmo::algorithm::cstrs_core::set_algorithm ( const base & algo )

Set algorithm.

A copy of the input algorithm will be set as the internal local algorithm.

Parameters

[in] algo algorithm to be set as local algorithm.

Definition at line 238 of file cstrs_core.cpp.

void pagmo::algorithm::cstrs_core::set_repair_algorithm ( const base & algo )

Set algorithm.

A copy of the input algorithm will be set as the internal local repair algorithm.

Parameters

[in] algo algorithm to be set as local repair algorithm.

Definition at line 258 of file cstrs_core.cpp.

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

Public Member Functions

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation