The combination process can also be seen as a function, which maps the outputs and weights to the combined result r: r = Comb(O n 1 , w n 1 ).
the error function of our system on development set is: From equation 5, it can be seen that: Given development set d, if the outputs to be combined O n 1 and the combination method Comb are fixed, the error function is just a function of the weights.