Table 8.

The performance of all corpus with different feature selection and kernel functions

	BOW						TPC						TE
	P	R	F	A	ROC	PRC	P	R	F	A	ROC	PRC	P	R	F	A	ROC	PRC
Linear
Youth development	0.394	0.686	0.501	0.862	0.891	0.508	0.249	0.791	0.379	0.740	0.836	0.367	0.151	0.808	0.255	0.525	0.688	0.154
Cigarette packaging	0.367	0.707	0.484	0.937	0.939	0.477	0.062	0.969	0.011	0.397	0.750	0.070	0.062	0.953	0.011	0.411	0.662	0.066
Cooking skill	0.366	0.482	0.416	0.967	0.922	0.328	0.038	0.947	0.073	0.422	0.701	0.038	0.032	0.921	0.061	0.326	0.717	0.051
COPD	0.595	0.773	0.672	0.909	0.927	0.720	0.418	0.876	0.566	0.838	0.893	0.557	0.184	0.907	0.306	0.504	0.714	0.202
Proton beam	0.057	0.078	0.066	0.881	0.562	0.063	0.057	0.606	0.105	0.452	0.547	0.068	0.054	0.551	0.098	0.460	0.479	0.051
RBF
Youth development	0.0	0.0	0.0	0.899	0.131	0.055	0.159	0.826	0.266	0.544	0.719	0.194	0.145	0.809	0.246	0.501	0.679	0.156
Cigarette packaging	0.0	0.0	0.0	0.958	0.063	0.021	0.0550	0.986	0.104	0.293	0.729	0.094	0.063	0.923	0.118	0.435	0.693	0.082
Cooking skill	0.0	0.0	0.0	0.9758	0.079	0.012	0.032	0.894	0.063	0.363	0.651	0.033	0.032	0.938	0.061	0.313	0.660	0.033
COPD	0.0	0.0	0.0	0.879	0.066	0.064	0.3577	0.804	0.495	0.801	0.882	0.506	0.169	0.958	0.287	0.427	0.702	0.189
Proton beam	0.0	0.0	0.0	0.9465	0.442	0.048	0.053	0.716	0.099	0.305	0.474	0.049	0.055	0.724	0.103	0.330	0.511	0.053
POLY
Youth development	0.0	0.0	0.0	0.899	0.153	0.054	0.153	0.826	0.258	0.523	0.702	0.170	0.151	0.791	0.253	0.532	0.683	0.153
Cigarette packaging	0.0	0.0	0.0	0.958	0.082	0.021	0.059	0.986	0.112	0.349	0.660	0.070	0.061	1.000	0.115	0.366	0.664	0.067
Cooking skill	0.0	0.0	0.0	0.975	0.512	0.500	0.037	0.938	0.072	0.418	0.703	0.039	0.031	0.903	0.061	0.332	0.655	0.043
COPD	0.0	0.0	0.0	0.8792	0.113	0.067	0.262	0.824	0.398	0.698	0.799	0.278	0.195	0.896	0.320	0.540	0.715	0.196
Proton beam	0.0	0.0	0.0	0.9465	0.482	0.054	0.0	0.0	0.0	0.946	0.483	0.050	0.0	0.0	0.0	0.946	0.489	0.052

BOW bag-of-word feature, TPC topic feature, TE term-enriched topic feature