永远不要让自尊心妨碍你做正确的事。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
成功不是终点,失败也并非致命,重要的是继续前进的勇气。
成功辨识的关键是找到一个足够灵活的模型结构,以捕捉系统的基本特征,同时又足够简单,可以从现有数据中估计出来。