Our hybrid system ( Fig.
when word w is given in position x (x = t0l; 1 1 1 ; t +r), element ipt x of input IPTi s a w eighted pattern, dened as ipt x = g x 1 (e w1 ; e w2 ; 1 11; e w ); (4) where g x is the information gain which can be obtained using information theory (for details see Ma and Isahara, 1998) and is the number of types of POSs.