ElitistAntSystem

java.lang.Object
- libai.ants.algorithms.Metaheuristic
- - libai.ants.algorithms.AntSystem
  - - libai.ants.algorithms.ElitistAntSystem

All Implemented Interfaces:

java.util.Comparator<Ant>

Direct Known Subclasses:

AntSystemRank
```
public abstract class ElitistAntSystem
extends AntSystem
```
This class belong to the core classes of the Ant Framework.
Implements the Elitits Ant System algorithm. It is essentially the same as Ant System, but the arcs of the best-so-far tour are reinforced on each iteration using the daemonActions() function. Empirical results shows that this behaves better that Ant System.

Field Summary

Fields
Modifier and Type Field Description

protected static int epsilon
Determine the weight given to the best-so-far tour Used in the daemonActions() method
- Fields inherited from class libai.ants.algorithms.AntSystem
  debug, pheromonesEvaporationRate
- Fields inherited from class libai.ants.algorithms.Metaheuristic
  alpha, Ants, bestSolution, beta, candidates, currentIterationNumber, destinationNode, E, Graph, initialNode, maxNumIterations, numberOfAnts, numberOfNodes, Parameters, Pheromones

Constructor Summary

Constructors
Modifier Constructor Description

protected ElitistAntSystem()
Constructor.

protected ElitistAntSystem(Enviroment E)
Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`checkParameters()`	Checks whether or not all of the algorithm's parameters exists.
`void`	`daemonActions()`	This function is called on each iteration and it provides a way to implement centralized actions

Methods inherited from class libai.ants.algorithms.AntSystem
antCycle, antDensity, antQuantity, candidateList, decisionRule, linkOccursInPath, pheromonesEvaporation, pheromonesUpdate, solve

Methods inherited from interface java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Methods inherited from class libai.ants.algorithms.Metaheuristic
compare, constrains, f, getBestSolution, getCurrentIterationNumber, getE, getNumberOfNodes, getParam, heuristicInfo, setE, setNumberOfNodes, setParam

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - epsilon
```
protected static final int epsilon
```
    Determine the weight given to the best-so-far tour Used in the daemonActions() method
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - ElitistAntSystem
```
protected ElitistAntSystem(Enviroment E)
```
    Constructor. Allocates the enviroment.
    
    Parameters:
    
    E - enviroment
  - ElitistAntSystem
```
protected ElitistAntSystem()
```
    Constructor. Empty constructor.
- Method Detail
  - checkParameters
```
public void checkParameters()
                     throws AntFrameworkException
```
    Description copied from class: Metaheuristic
    
    Checks whether or not all of the algorithm's parameters exists. If some obligatory parameter do not exist, the function throws an exception. If some other parameter do not exists but it is possible to set a default value, here is the place to do it.
    
    Overrides:
    
    checkParameters in class AntSystem
    
    Throws:
    
    AntFrameworkException
  - daemonActions
```
public void daemonActions()
```
    Description copied from class: Metaheuristic
    
    This function is called on each iteration and it provides a way to implement centralized actions
    
    Overrides:
    
    daemonActions in class AntSystem