Dear all, We are doing some experiments by adding new features at phrase level in the translation table. We have done a first experiment to see the effects and they are quite weird:
* We build a translation table with 9 features and a similar translation table with 18 features (the same 9 features + 9 new features) * We run MERT (or MIRA) on a dev set using the first translation table (9 features) * We translate a test set with 2 configurations: - MERT on 9 features using the translation table with 9 features - MERT on 9 features using the translation table with 18 features (9 + 9) where the weight for the 9 extra features is set to 0 We loose more than 3 points of BLEU with the second configuration with respect to the first one. (Using MERT on the 18 features gives similar results to the second configuration) Does anyone know if there is some penalty when adding more features? Or has anyone encountered the same problem? Thanks in advance! Best, Cristina _______________________________________________ Moses-support mailing list [email protected] http://mailman.mit.edu/mailman/listinfo/moses-support
