A Unified and Discriminative Soft Syntactic Constraint Model for Hierarchical Phrase-based Translation Lemao Liu author Tiejun Zhao author Chao Wang author Hailong Cao author 2011-sep 19-23 text Proceedings of Machine Translation Summit XIII: Papers Xiamen, China conference publication liu-etal-2011-unified-discriminative https://aclanthology.org/2011.mtsummit-papers.28/ 2011-sep 19-23