VOL_parms Struct Reference

This class contains the parameters controlling the Volume Algorithm. More...

#include <VolVolume.hpp>

List of all members.

Public Attributes
double	lambdainit
	initial value of lambda
double	alphainit
	initial value of alpha
double	alphamin
	minimum value for alpha
double	alphafactor
	when little progress is being done, we multiply alpha by alphafactor
double	ubinit
	initial upper bound of the value of an integer solution
double	primal_abs_precision
	accept if max abs viol is less than this
double	gap_abs_precision
	accept if abs gap is less than this
double	gap_rel_precision
	accept if rel gap is less than this
double	granularity
	terminate if best_ub - lcost < granularity
double	minimum_rel_ascent
	terminate if the relative increase in lcost through ascent_check_invl steps is less than this
int	ascent_first_check
	when to check for sufficient relative ascent the first time
int	ascent_check_invl
	through how many iterations does the relative ascent have to reach a minimum
int	maxsgriters
	maximum number of iterations
int	printflag
	controls the level of printing.
int	printinvl
	controls how often do we print
int	heurinvl
	controls how often we run the primal heuristic
int	greentestinvl
	how many consecutive green iterations are allowed before changing lambda
int	yellowtestinvl
	how many consecutive yellow iterations are allowed before changing lambda
int	redtestinvl
	how many consecutive red iterations are allowed before changing lambda
int	alphaint
	number of iterations before we check if alpha should be decreased
char *	temp_dualfile
	name of file for saving dual solution

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Detailed Description

This class contains the parameters controlling the Volume Algorithm.

Definition at line 66 of file VolVolume.hpp.

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Member Data Documentation

double VOL_parms::lambdainit

initial value of lambda

Definition at line 68 of file VolVolume.hpp.

double VOL_parms::alphainit

initial value of alpha

Definition at line 70 of file VolVolume.hpp.

double VOL_parms::alphamin

minimum value for alpha

Definition at line 72 of file VolVolume.hpp.

double VOL_parms::alphafactor

when little progress is being done, we multiply alpha by alphafactor

Definition at line 74 of file VolVolume.hpp.

double VOL_parms::ubinit

initial upper bound of the value of an integer solution

Definition at line 77 of file VolVolume.hpp.

double VOL_parms::primal_abs_precision

accept if max abs viol is less than this

Definition at line 80 of file VolVolume.hpp.

double VOL_parms::gap_abs_precision

accept if abs gap is less than this

Definition at line 82 of file VolVolume.hpp.

double VOL_parms::gap_rel_precision

accept if rel gap is less than this

Definition at line 84 of file VolVolume.hpp.

double VOL_parms::granularity

terminate if best_ub - lcost < granularity

Definition at line 86 of file VolVolume.hpp.

double VOL_parms::minimum_rel_ascent

terminate if the relative increase in lcost through ascent_check_invl steps is less than this

Definition at line 90 of file VolVolume.hpp.

int VOL_parms::ascent_first_check

when to check for sufficient relative ascent the first time

Definition at line 92 of file VolVolume.hpp.

int VOL_parms::ascent_check_invl

through how many iterations does the relative ascent have to reach a minimum

Definition at line 95 of file VolVolume.hpp.

int VOL_parms::maxsgriters

maximum number of iterations

Definition at line 98 of file VolVolume.hpp.

int VOL_parms::printflag

controls the level of printing.

The flag should the the 'OR'-d value of the following options:

• 0 - print nothing
• 1 - print iteration information
• 2 - add lambda information
• 4 - add number of Red, Yellow, Green iterations

Default: 3

Definition at line 110 of file VolVolume.hpp.

int VOL_parms::printinvl

controls how often do we print

Definition at line 112 of file VolVolume.hpp.

int VOL_parms::heurinvl

controls how often we run the primal heuristic

Definition at line 114 of file VolVolume.hpp.

int VOL_parms::greentestinvl

how many consecutive green iterations are allowed before changing lambda

Definition at line 118 of file VolVolume.hpp.

int VOL_parms::yellowtestinvl

how many consecutive yellow iterations are allowed before changing lambda

Definition at line 121 of file VolVolume.hpp.

int VOL_parms::redtestinvl

how many consecutive red iterations are allowed before changing lambda

Definition at line 124 of file VolVolume.hpp.

int VOL_parms::alphaint

number of iterations before we check if alpha should be decreased

Definition at line 127 of file VolVolume.hpp.

char* VOL_parms::temp_dualfile

name of file for saving dual solution

Definition at line 130 of file VolVolume.hpp.

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The documentation for this struct was generated from the following file:

• /home/coin/svn-release/OptimizationSuite-1.1.0/Vol/src/VolVolume.hpp