The Feature Subspace Method for SMT System Combination Nan Duan author Mu Li author Tong Xiao author Ming Zhou author 2009-08 text Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing Philipp Koehn editor Rada Mihalcea editor Association for Computational Linguistics Singapore conference publication duan-etal-2009-feature https://aclanthology.org/D09-1114/ 2009-08 1096 1104