org.cognity.neural.link

Class WeightedLink

java.lang.Object

org.cognity.neural.link.WeightedLink

All Implemented Interfaces:

Serializable, Link

public final class WeightedLink
extends Object
implements Link, Serializable

The weighted link is most widely used type of a link. This type of link stimulates each neuron in the target layer with a weighted sum of the source layer outputs.
More formally, stimulus for i-th neuron in the target layer is defined as:

where :

• is the number of neurons in the source layer
• is the k-th element in the source layer output
• is the weight between i-th neuron in the target layer and k-th neuron in the source layer.

Or in matrix notation:

Author:

Artur Markiewicz

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
WeightedLink(Layer sourceLayer, Layer targetLayer) Creates a link using specified layers.

Method Summary

Methods

Modifier and Type	Method and Description
void	activate() Performs computations for this link.
boolean	equals(Object obj)
Layer	getSource() Returns a source layer.
Layer	getTarget() Return the target layer.
double	getWeight(int toNeuron, int fromNeuron) Returns a weight between toNeuron-th neuron in the target layer and fromNeuron-th neuron in the source layer.
int	getWeightCount() Returns the number of weights in this link.
int	hashCode()
void	setWeight(int toNeuron, int fromNeuron, double weight) Sets a weight between toNeuron-th neuron in the target layer and fromNeuron-th neuron in the source layer.

Methods inherited from class java.lang.Object

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

Constructor Detail

WeightedLink

public WeightedLink(Layer sourceLayer,
            Layer targetLayer)

Creates a link using specified layers.

Parameters:

sourceLayer - The source layer. Cannot be null.

targetLayer - The target layer. Cannot be null.

Method Detail

getSource

public Layer getSource()

Description copied from interface: Link

Returns a source layer.

Specified by:

getSource in interface Link

Returns:

the source layer

getTarget

public Layer getTarget()

Description copied from interface: Link

Return the target layer.

Specified by:

getTarget in interface Link

Returns:

the target layer

getWeight

public double getWeight(int toNeuron,
               int fromNeuron)

Description copied from interface: Link

Returns a weight between toNeuron-th neuron in the target layer and fromNeuron-th neuron in the source layer. I.e. returns the element in the weight matrix.

Specified by:

getWeight in interface Link

Parameters:

toNeuron - an index of the neuron in the target layer

fromNeuron - an index of the neuron in the source layer

Returns:

a weight between fromNeuron and toNeuron

setWeight

public void setWeight(int toNeuron,
             int fromNeuron,
             double weight)

Description copied from interface: Link

Sets a weight between toNeuron-th neuron in the target layer and fromNeuron-th neuron in the source layer. I.e. sets the element in the weight matrix to the given value.

Specified by:

setWeight in interface Link

Parameters:

toNeuron - an index of the neuron in the target layer

fromNeuron - an index of the neuron in the source layer

weight - the weight

getWeightCount

public int getWeightCount()

Description copied from interface: Link

Returns the number of weights in this link.

Specified by:

getWeightCount in interface Link

Returns:

the number of weights in this link

activate

public void activate()

Description copied from interface: Link

Performs computations for this link.

Specified by:

activate in interface Link

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object