org.joone.engine.learning

Class FahlmanTeacherSynapse

java.lang.Object

org.joone.engine.Synapse

org.joone.engine.learning.AbstractTeacherSynapse

org.joone.engine.learning.TeacherSynapse

org.joone.engine.learning.FahlmanTeacherSynapse

All Implemented Interfaces:

java.io.Serializable, InputPatternListener, Learnable, LearnableSynapse, NeuralElement, OutputPatternListener, Inspectable

public class FahlmanTeacherSynapse
extends TeacherSynapse

This class extends the normal Teacher synapse and implements the Fahlman 40-20-40 criterion (the values can be changed). This teacher makes only sense in case of binary outputs.

In case of the default values (40-20-40) and considering [0,1] binary outputs the criterion is fullfilled if for all patterns the output is - within [0, 0.4] in case the desired output is 0 - within [0.6, 1] in case the desired output is 1.

More about this criterion can be found at http://citeseer.ist.psu.edu/fahlman88empirical.html.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CRITERION Constant to indicate (key) the parameter for checking (in the monitor object) if the criterion has been forfilled or not.

Constructor Summary

Constructors

Constructor and Description
FahlmanTeacherSynapse() Creates a new instance of FahlmanTeacherSynapse

Method Summary

Modifier and Type	Method and Description
double	getLowerBit() Gets the lower bit value.
double	getLowerBitPercentage() Gets the lower bit percentage.
double	getUpperBit() Gets the upper bit value.
double	getUpperBitPercentage() Gets the upper bit percentage.
void	setLowerBit(double aValue) Sets the lower bit.
void	setLowerBitPercentage(double aValue) Sets the lower bit percentage.
void	setUpperBit(double aValue) Sets the upper bit.
void	setUpperBitPercentage(double aValue) Sets the upper bit percentage.

Methods inherited from class org.joone.engine.learning.TeacherSynapse

fwdPut

Methods inherited from class org.joone.engine.learning.AbstractTeacherSynapse

check, fwdGet, getDesired, init, netStoppedError, reset, resetInput, revGet, revPut, setDesired, setInputDimension, setMonitor

Methods inherited from class org.joone.engine.Synapse

addNoise, canCountSteps, getIgnoreBefore, getInputDimension, getLearner, getLearningRate, getMomentum, getMonitor, getName, getOutputDimension, getWeights, initLearner, InspectableTitle, Inspections, isEnabled, isInputFull, isLoopBack, isOutputFull, randomize, setEnabled, setIgnoreBefore, setInputFull, setLearningRate, setLoopBack, setMomentum, setName, setOutputDimension, setOutputFull, setWeights

Methods inherited from class java.lang.Object

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

Field Detail

CRITERION

public static final java.lang.String CRITERION

Constant to indicate (key) the parameter for checking (in the monitor object) if the criterion has been forfilled or not.

See Also:

Constant Field Values

Constructor Detail

FahlmanTeacherSynapse

public FahlmanTeacherSynapse()

Creates a new instance of FahlmanTeacherSynapse

Method Detail

setUpperBit

public void setUpperBit(double aValue)

Sets the upper bit.

Parameters:

aValue - sets the upper bit to aValue.

getUpperBit

public double getUpperBit()

Gets the upper bit value.

Returns:

the upper bit value.

setLowerBit

public void setLowerBit(double aValue)

Sets the lower bit.

Parameters:

aValue - sets the lower bit to aValue.

getLowerBit

public double getLowerBit()

Gets the lower bit value.

Returns:

the lower bit value.

setUpperBitPercentage

public void setUpperBitPercentage(double aValue)

Sets the upper bit percentage.

Parameters:

aValue - sets the upper bit percentage to aValue.

getUpperBitPercentage

public double getUpperBitPercentage()

Gets the upper bit percentage.

Returns:

the upper bit percentage.

setLowerBitPercentage

public void setLowerBitPercentage(double aValue)

Sets the lower bit percentage.

Parameters:

aValue - sets the lower bit percentage to aValue.

getLowerBitPercentage

public double getLowerBitPercentage()

Gets the lower bit percentage.

Returns:

the lower bit percentage.