不要等待完美的时刻,抓住时机并让它变得完美。
Memory can make a thing seem to have been much more than it was.
如果你需要统计才能知道你在做什么,那你可能不应该做这件事。
The best time to plant a tree was 20 years ago. The second-best time is now.
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。