A simple combination method is the equal voting method (van Halteren et al., 2001;Tjong Kim Sang et al., 2000), where the parameters are computed as λ i (w) = 1 n and P i (C|w, C i ) = δ (C, C i ), where δ is the Kronecker operator (δ (x, y) := (x = y?1 : 0)) -each of the classifiers votes with equal weight for the class that is most likely under its model, and the class receiving the largest number of votes wins.
this procedure may lead to ties, where some classes receive the same number of votes -one usually resorts to randomly selecting one of the tied candidates in this case - Table 2 presents the average results obtained by this method, together with the variance obtained over 30 trials.