Improving Alignment of System Combination by Using Multi-objective Optimization Tian Xia author Zongcheng Ji author Shaodan Zhai author Yidong Chen author Qun Liu author Shaojun Wang author 2013-10 text Proceedings of the 2013 Conference on Empirical Methods in Natural Language Processing David Yarowsky editor Timothy Baldwin editor Anna Korhonen editor Karen Livescu editor Steven Bethard editor Association for Computational Linguistics Seattle, Washington, USA conference publication xia-etal-2013-improving https://aclanthology.org/D13-1051/ 2013-10 535 544