Research in SMT parameter tuning has seen a surge of interest recently, including online/batch learning (Watanabe, 2012;Cherry and Foster, 2012), large-scale training (Simianer et al., 2012;He and Deng, 2012), and new discriminative objectives (Gimpel and Smith, 2012;Zheng et al., 2012;Bazrafshan et al., 2012).
few works have investigated the multi-metric tuning problem in depth.