CFLOAT kernel(KERNEL_PARM *kernel_parm, DOC *a, DOC *b)
/* calculate the kernel function */
{
// double k1;
kernel_cache_statistic++;
switch(kernel_parm->kernel_type) {
case 0: /* linear */
return(CFLOAT)sprod(a, b);
case 1: /* polynomial */
return ((CFLOAT)pow(kernel_parm->coef_lin*sprod(a, b)
+kernel_parm->coef_const,(double)kernel_parm->poly_degree));
case 2: /* radial basis function */
return((CFLOAT)exp(-kernel_parm->rbf_gamma*(a->twonorm_sq-2*sprod(a,b)+b->twonorm_sq)));
case 3: /* sigmoid neural net */
return((CFLOAT)tanh(kernel_parm->coef_lin*sprod(a,b)+kernel_parm->coef_const));
case 4: /* custom-kernel supplied in file kernel.h */
return((CFLOAT)custom_kernel(kernel_parm,a,b));
case 5: /* combine kernels */
return ((CFLOAT)advanced_kernels(kernel_parm,a,b));
case 11: /* Re-ranking of predicate argument structures only trees, i.e. re-ranking using trees */
return((CFLOAT)SRL_re_ranking_CoNLL2006(kernel_parm,a,b));
case 12: /* Re-ranking of predicate argument structures only trees + vectors */
return((CFLOAT)SRL_re_ranking_CoNLL2006(kernel_parm,a,b));
case 13: /* Re-ranking of predicate argument structures only vectors */
return((CFLOAT)SRL_re_ranking_CoNLL2006(kernel_parm,a,b));
case 14: /* Classification of Entailment pairs */
return((CFLOAT)ACL2006_Entailment_kernel(kernel_parm,a,b));
default: /* Advanced vectorial kernels*/
printf("\nNo kernel corresponding to -t = %ld option \n",kernel_parm->kernel_type);
exit(-1);
/*if (b->num_of_trees > 0 && a->num_of_trees>0) {
printf("\n tree 1: <"); writeTreeString(a->forest_vec[0]->root);
printf(">\n tree 2: <"); writeTreeString(b->forest_vec[0]->root);printf(">\n");
printf("Kernel :%1.20lf \n",k1);
}*/
}
}
CFLOAT kernel(KERNEL_PARM *kernel_parm, DOC *a, DOC *b)
/* calculate the kernel function */
{
// double k1;
kernel_cache_statistic++;
/* Start - added by Faisal on 26-Apr-2011 */
double tkd = 0;
/* End - added by Faisal on 26-Apr-2011 */
switch(kernel_parm->kernel_type) {
case 0: /* linear */
tkd = sprod(a, b);
//printf("\nAfter computing 1 vector kernel, tkd = %f option \n", tkd);
return(CFLOAT) tkd;
case 1: /* polynomial */
return ((CFLOAT)pow(kernel_parm->coef_lin*sprod(a, b)
+kernel_parm->coef_const,(double)kernel_parm->poly_degree));
case 2: /* radial basis function */
return((CFLOAT)exp(-kernel_parm->rbf_gamma*(a->twonorm_sq-2*sprod(a,b)+b->twonorm_sq)));
case 3: /* sigmoid neural net */
return((CFLOAT)tanh(kernel_parm->coef_lin*sprod(a,b)+kernel_parm->coef_const));
case 4: /* custom-kernel supplied in file kernel.h */
return((CFLOAT)custom_kernel(kernel_parm,a,b));
case 5: /* combine kernels */
tkd = advanced_kernels(kernel_parm,a,b);
//printf("\nAfter merging 1 vector and 1 tree kernels, tkd = %f option \n", tkd);
return ((CFLOAT) tkd);
case 6: /* Tree kernels on u*/
return tree_kernel(kernel_parm, a, b, atoi(kernel_parm->custom), atoi(kernel_parm->custom));
case 11: /* Re-ranking of predicate argument structures only trees, i.e. re-ranking using trees */
return((CFLOAT)SRL_re_ranking_CoNLL2006(kernel_parm,a,b));
case 12: /* Re-ranking of predicate argument structures only trees + vectors */
return((CFLOAT)SRL_re_ranking_CoNLL2006(kernel_parm,a,b));
case 13: /* Re-ranking of predicate argument structures only vectors */
return((CFLOAT)SRL_re_ranking_CoNLL2006(kernel_parm,a,b));
case 14: /* Classification of Entailment pairs */
return((CFLOAT)ACL2006_Entailment_kernel(kernel_parm,a,b));
case 15: /* Classification of Entailment pairs */
return (CFLOAT)JHU_KERNELS(kernel_parm, a, b);
case 16: /* Classification of Entailment pairs */
return((CFLOAT)ACL2008_Entailment_kernel(kernel_parm,a,b));
case 17: return (CFLOAT)ACL2008(kernel_parm, a, b);
case 30: /* Classification of Entailment pairs */
return Question_Answer_Classification(kernel_parm, a, b);
case 51: /* Re-ranking of predicate argument structures only trees, i.e. re-ranking using trees */
return((CFLOAT) SRL2008(kernel_parm, a, b));
case 52: /* Re-ranking of predicate argument structures only trees + vectors */
return((CFLOAT) SRL2008(kernel_parm, a, b));
case 53: /* Re-ranking of predicate argument structures only vectors */
return((CFLOAT) SRL2008(kernel_parm, a, b));
case 100: /* Use only the tree whose index is specified in the custom parameter */
return((CFLOAT) tree_kernel(kernel_parm, a, b, atoi(kernel_parm->custom),atoi(kernel_parm->custom)));
/* Start - added by Faisal on 26-Apr-2011 */
case 54: /* - custom-kernel supplied in file kernel.h
- combine kernels */
tkd = custom_kernel(kernel_parm,a,b);
kernel_parm->combination_type = 'V';
return ((CFLOAT)( advanced_kernels(kernel_parm,a,b) + kernel_parm->tree_constant*tkd ));
/* End - added by Faisal on 26-Apr-2011 */
/* Start - added by Faisal on 27-Apr-2011
This is virtually same as the 54. The only difference is that, computation of vector kernel is called
first instead of tree kernel. However, the results should be same.
*/
case 45: /* - combine kernels
- custom-kernel supplied in file kernel.h */
kernel_parm->combination_type = 'V';
tkd = advanced_kernels(kernel_parm,a,b);
kernel_parm->combination_type = 'T';
return ((CFLOAT)( tkd + kernel_parm->tree_constant*custom_kernel(kernel_parm,a,b) ));
/* End - added by Faisal on 27-Apr-2011 */
/* Start - added by Faisal on 24-Aug-2011 */
case 50: /* - combine two feature vector kernels */
// kernel_parm->second_kernel=0;
return (CFLOAT)( basic_kernel(kernel_parm, a, b, 0, 0) + basic_kernel(kernel_parm, a, b, 1, 1) );
/* End - added by Faisal on 24-Aug-2011 */
/* Start - added by Faisal on 24-Aug-2011 * /
case 501: /* - combine 1 vector and 1 tree kernels * /
kernel_parm->combination_type = 'T';
tkd = ((CFLOAT)advanced_kernels(kernel_parm,a,b));
kernel_parm->second_kernel=0;
kernel_parm->combination_type = 'V';
int totalVect = 1, v=0; // Faisal: hard coded
float kernel_val = 0;
for ( v=0; v<totalVect; v++ )
kernel_val+=(CFLOAT) basic_kernel(kernel_parm, a, b, v, v);
return (CFLOAT)( kernel_val + kernel_parm->tree_constant*tkd );
/* End - added by Faisal on 24-Aug-2011 */
/* Start - added by Faisal on 24-Aug-2011 */
case 502: /* - combine 2 vectors and 1 tree kernels */
// step 1 - merge 1 vector and 1 tree kernel
/*
tkd = ((CFLOAT)advanced_kernels(kernel_parm,a,b));
//printf("\nAfter merging 1 vector and 1 tree kernels, tkd = %f option \n", tkd);
kernel_parm->second_kernel=0;
kernel_parm->combination_type = 'V';
// step 2 - compute 2nd vector kernel and merge it with previously computed outcome
float kernel_val = (CFLOAT) basic_kernel(kernel_parm, a, b, 1, 1);
//printf("\nAfter computing 2nd vector kernel, kernel_val = %f option \n", kernel_val);
kernel_val = (CFLOAT)( kernel_val + tkd );
// printf("\ntkd + kernel_val = %f option \n", kernel_val);
return (CFLOAT)( kernel_val );
*/
tkd = basic_kernel(kernel_parm, a, b, 0, 0) + basic_kernel(kernel_parm, a, b, 1, 1) + kernel_parm->tree_constant*tree_kernel(kernel_parm, a, b, 0, 0);
return (CFLOAT)( tkd );
/* End - added by Faisal on 24-Aug-2011 */
default: /* Advanced vectorial kernels*/
printf("\nNo kernel corresponding to -t = %ld option \n",kernel_parm->kernel_type);
exit(-1);
/*if (b->num_of_trees > 0 && a->num_of_trees>0) {
printf("\n tree 1: <"); writeTreeString(a->forest_vec[0]->root);
printf(">\n tree 2: <"); writeTreeString(b->forest_vec[0]->root);printf(">\n");
printf("Kernel :%1.20lf \n",k1);
}*/
}
}