Parameter Optimization for Statistical Machine Translation: It Pays to Learn from Hard Examples Preslav Nakov author Fahad Al Obaidli author Francisco Guzmán author Stephan Vogel author 2013-09 text Proceedings of the International Conference Recent Advances in Natural Language Processing RANLP 2013 Ruslan Mitkov editor Galia Angelova editor Kalina Bontcheva editor INCOMA Ltd. Shoumen, BULGARIA Hissar, Bulgaria conference publication nakov-etal-2013-parameter https://aclanthology.org/R13-1066/ 2013-09 504 510