我们都是自己欲望的囚徒,自由只是另一种形式的束缚。
"We are all prisoners of our own desires, and freedom is just another form of captivity."
The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.
The more difficult the victory, the greater the happiness in winning.
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。