Instead of using the Max-Margin criterion (Taskar et al., 2005) adopted by previous neural network models for CWS (Zheng et al., 2013;Pei et al., 2014;Chen et al., 2015a,b), we try to directly maximize the log-probability of the correct tag sequence following Lample et al.
cWS accuracies can drop gravely on cross-domain corpora.