org.apache.ctakes.ytex.kernel.evaluator

Class WeightedPolynomialMixingKernel

java.lang.Object

org.apache.ctakes.ytex.kernel.evaluator.WeightedPolynomialMixingKernel

All Implemented Interfaces:

Kernel, org.springframework.beans.factory.InitializingBean

public class WeightedPolynomialMixingKernel
extends Object
implements Kernel, org.springframework.beans.factory.InitializingBean

weighted polynomial mixing kernel: (\sum w_i * k(x_i, y_i) \div \sum w_i ) ^ l

• Apply the delegate kernel to the respective 'parts' of this node (x_i, y_i)
• Multiply the result by the weight (w_i * k(x_i,y_i))
• Sum everything up, divide by the sum of the weights
• take the power of everything to l

pow the power to raise things to

attributeKey the children of this node form a 'vector'. This is the attribute that we use to 'index' this vector

mapIndexWeight the indices (i.e. the value of child.getValue().get(attributeKey) and the corresponding weights. The indices must be integers. The class must be identical to the class of the child - take care that the numeric types match.

delegateKernel the kernel to apply to pairs of children.

Author:

vijay

Constructor Summary

Constructors

Constructor and Description
WeightedPolynomialMixingKernel()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet() precompute the scaling factor - we will always divide by this
double	evaluate(Object o1, Object o2)
String	getAttributeKey()
Kernel	getDelegateKernel()
Map<Integer,Double>	getMapIndexWeight()
int	getPow()
void	setAttributeKey(String attributeKey)
void	setDelegateKernel(Kernel delegateKernel)
void	setMapIndexWeight(Map<Integer,Double> mapIndexWeight)
void	setPow(int pow)

Methods inherited from class java.lang.Object

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

Constructor Detail

WeightedPolynomialMixingKernel

public WeightedPolynomialMixingKernel()

Method Detail

getPow

public int getPow()

setPow

public void setPow(int pow)

getAttributeKey

public String getAttributeKey()

setAttributeKey

public void setAttributeKey(String attributeKey)

getMapIndexWeight

public Map<Integer,Double> getMapIndexWeight()

setMapIndexWeight

public void setMapIndexWeight(Map<Integer,Double> mapIndexWeight)

getDelegateKernel

public Kernel getDelegateKernel()

setDelegateKernel

public void setDelegateKernel(Kernel delegateKernel)

evaluate

public double evaluate(Object o1,
                       Object o2)

Specified by:

evaluate in interface Kernel

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

precompute the scaling factor - we will always divide by this

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

Throws:

Exception