Text Mining NLP ML Thinking in (Text)Clustering No math,be not afraid Yueshen Xu (lecturer) ysxu@xidian.edu.cn/xuyueshen@163.com Data and Knowledge Engineering Research Center Xidian UniversityThinking in (Text) Clustering （No math, be not afraid） Yueshen Xu (lecturer) ysxu@xidian.edu.cn / xuyueshen@163.com Data and Knowledge Engineering Research Center Xidian University Text Mining & NLP & ML