Thanks, I'll try this to obtain at least more information Cristina
On Wed, 25 Jul 2012, Barry Haddow wrote: > Hi Cristina > > If you add extra features but give them zero weight then they shouldn't > affect the overall score, and so shouldn't affect the translation. Try > running moses with '-v 2' to see the translation options and check that > the extra features are being loaded as you intended, > > cheers - Barry > > On 25/07/12 17:24, Cristina wrote: > > 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 > > > _______________________________________________ Moses-support mailing list [email protected] http://mailman.mit.edu/mailman/listinfo/moses-support
