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6. Data preprocessing, feature engineering and model training.PS: In fact, I have seen all the design patterns a long time ago. However, I didn't write a blog, but I soon forgot it and didn't play any role. This time I summed it up in the form of a blog, and found that the effect was still obvious, because through this way of summarizing, I understood it more deeply, remembered it more firmly, and affected my thinking of realizing functions at ordinary times. Therefore, I encourage everyone to sort out what they have learned by taking notes, so that I believe they can understand it more deeply and better. I will write it down all the time and then plan to write a series of WCF articles.张老太太瞪了他一眼，道：还是那么馋。汴京、发生了一宗离奇命案，捕头全无头绪，一人出现了，大家登时欣喜若狂，来者正是被喻为大宋第一聪明人，这两年间屡破奇案的人！他，就是公孙策！公孙策没辜负众望，瞬间已抓出真凶。包拯已失踪两年多了！两年前，包拯忽接到一封信，便急急离开家园，之后便音讯全无！这些年里，每当有奇案发生，公孙策便会赶赴现场，目的，其实是为了寻找包拯！原来包拯失去记忆了！包拯虽失去记忆，然其超凡的分析推理能力却没有失掉，他终于找到真凶了，可是就在此时，真凶欲杀包拯灭口，包拯头颅被重击至昏迷。本剧最特别之处在于以泰德未来小孩的口吻倒叙，但老爸可以确定的情况下，到底谁是老妈？始终是全剧最大悬念。疑惑道：老爹，令媛似乎对寡人的身份有疑虑。顽皮可爱的霸王龙小分队成员图图、刷子、大龙和二龙总在幼儿园搞一些让家长和小朋友们头疼的“恶作剧”。正当家长们被这一系列问题弄得焦头烂额之际，“面恶心善”的牛爷爷成了图图刷子为首的霸王龙小分队最害怕的人。然而随着与心灵手巧的牛爷爷深入接触，霸王龙小分队了解到最棒的“恶作剧”是让别人也开心，甚至感到幸福。为此霸王龙小分队和牛爷爷来到了老年之家，举行了一场精心策划的演出，为孤老们带来欢乐的同时，还得到了意外的惊喜。并由此在网络上颁布了“霸王龙”召集令，开启了一场轰轰烈烈的“霸王龙行动”!