Based on the normalmodeanalysis, the characteristic equations were deduced from the perturbation equations of fluid mechanics.
基于模态分析，从流体力学扰动方程组出发，推导出了特征方程。
2
Part III: From the result of the investigation of Geography Education Practice Mode in Sichuan Normal University, point out analysis of the existing problems.
第三部分：四川师范大学地理教育实习模式开展现状调研结果分析，指出当前存在的一些问题。
3
According to social network analysis theory, a large number of abnormal behaviors are always hidden in the normalmode of behavior.