用viterbi方法进行词性标注 pos_tag.py 词性标注 evaluate.py 词性标注性能评估 PD_1998_01_POS.txt ”人民日报“语料库 标准词性标注结果.txt 语料库中后10 的数库（分词+词性标注）-Using the viterbi methods for part-of-speech tagging pos_tag.py part-of-speech tagging the evaluate.py speech tagging perform