Hi Rajnath,

Against what test set are you comparing your BLEU scores? If you mean that your 
BLEU score on test set is lower than the BLEU on dev/tuning set then that is 
fine. The BLEU score on tuning set is generally higher than the BLEU score on 
test set as the parameters of the features were tuned using the tuning set.

Best,
Jasneet

> On Apr 25, 2016, at 2:38 AM, Rajnath Patel <[email protected]> wrote:
> 
> Hi all,
> 
> I am trying to tune a phrase based model with default tuning parameters 
> (MERT, BLEU). But, instead of improvement getting reduced BLEU on test set. 
> Kindly help to choose the appropriate algorithm and metrics for 
> English-French SMT.
> 
> Thank you!
> 
> -- 
> Regards,
> Raj Nath Patel
> 
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