Without freedom, there is no creation, and without creation, there is no true life.

系统辨识是从观测到的输入输出数据中建立动态系统数学模型的科学与艺术。

Great design solves problems, not just looks good.

So we beat on, boats against the current, borne back ceaselessly into the past.

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.

如果你实在没有办法从别人那得到一句赞美，那就自己送自己一句吧。