This is a with-segmentation approach C˙S.
when we compute frequencies of word pairs, there are six combinations C gS , C gW , C bS , C bW , C p2S , and C p2W , where the subscript g means the Google Chinese Web 5-gram corpus (GC5g) is adopted, the subscript b means the Chinese Web POS 5-gram corpus (CP5g) is adopted, and the subscript p2 means Equation 4and CP5g are adopted.