系统辨识的挑战不仅在于拟合数据,还在于提取有意义且可推广的模型。
I don’t know if we each have a destiny, or if we’re all just floating around accidental—like on a breeze.
To write is to resist the forces of forgetting.
正是因为国家倾向于愚蠢和卑劣,民主才有可能。