数据模型归一化，模态振动，进行逐步线性回归，是小学期课程设计的题目，对于初学者具有参考意义，这个有中文注释，看得明白。- Normalized data model, modal vibration, Stepwise linear regression, Is the topic of the elementary school stage curriculum design, For beginners with a reference value, The Chinese have a c