it.uniroma2.sag.kelp.kernel.overPairs

Class PreferenceKernel

java.lang.Object

it.uniroma2.sag.kelp.kernel.Kernel

it.uniroma2.sag.kelp.kernel.KernelComposition

it.uniroma2.sag.kelp.kernel.overPairs.KernelOverPairs

it.uniroma2.sag.kelp.kernel.overPairs.PreferenceKernel

public class PreferenceKernel
extends KernelOverPairs

It is a kernel operating on ExamplePairs applying the following formula:
\(K( < x_1, x_2 >, < y_1,y_2 > ) = K(x_1, y_1) + K(x_2, y_2) - K(x_1, y_2) - K(x_2, y_1)\)
where K is another kernel the preference kernel relies on.
The preference kernel was firstly introduced in: [Shen and Joshi, 2003] L. Shen and A. K. Joshi. An SVM based voting algorithm with application to parse reranking. In Proc. of CoNLL. 2003.

Author:

Simone Filice

Field Summary

Fields inherited from class it.uniroma2.sag.kelp.kernel.KernelComposition

baseKernel

Constructor Summary

Constructors

Constructor and Description
PreferenceKernel()
PreferenceKernel(Kernel baseKernel)

Method Summary

Methods

Modifier and Type	Method and Description
float	kernelComputationOverPairs(Example exA1, Example exA2, Example exB1, Example exB2) Returns the kernel computation

Methods inherited from class it.uniroma2.sag.kelp.kernel.overPairs.KernelOverPairs

kernelComputation

Methods inherited from class it.uniroma2.sag.kelp.kernel.KernelComposition

getBaseKernel, setBaseKernel

Methods inherited from class it.uniroma2.sag.kelp.kernel.Kernel

disableCache, getKernelCache, getKernelComputations, getNumberOfHits, getNumberOfMisses, getSquaredNormCache, innerProduct, load, reset, save, setKernelCache, setSquaredNormCache, squaredNorm, squaredNormOfTheDifference

Methods inherited from class java.lang.Object

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

Constructor Detail

PreferenceKernel

public PreferenceKernel(Kernel baseKernel)

PreferenceKernel

public PreferenceKernel()

Method Detail

kernelComputationOverPairs

public float kernelComputationOverPairs(Example exA1,
                               Example exA2,
                               Example exB1,
                               Example exB2)

Description copied from class: KernelOverPairs

Returns the kernel computation

Specified by:

kernelComputationOverPairs in class KernelOverPairs

Parameters:

exA1 - the first element of the first pair

exA2 - the second element of the first pair

exB1 - the first element of the second pair

exB2 - the second element of the second pair

Returns:

the result of the kernel computation