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For codes of the same length, theoretically, the further the coding distance between any two categories, the stronger the error correction capability. Therefore, when the code length is small, the theoretical optimal code can be calculated according to this principle. However, it is difficult to effectively determine the optimal code when the code length is slightly larger. In fact, this is an NP-hard problem. However, we usually do not need to obtain theoretical optimal codes, because non-optimal codes can often produce good enough classifiers in practice. On the other hand, it is not that the better the theoretical properties of coding, the better the classification performance, because the machine learning problem involves many factors, such as dismantling multiple classes into two "class subsets", and the difficulty of distinguishing the two class subsets formed by different dismantling methods is often different, that is, the difficulty of the two classification problems caused by them is different. Therefore, one theory has a good quality of error correction, but it leads to a difficult coding for the two-classification problem, which is worse than the other theory, but it leads to a simpler coding for the two-classification problem, and it is hard to say which is better or weaker in the final performance of the model.看来风流公子往往也有他感情细腻的一面，这也算是张默的真情流露吧。吴孟达用自己方式演戏这个会扮猪、扮老爸、扮暴牙、扮乞丐……专门扮经典配角的吴孟达。她终于痛哭失声，紧跟着又咬牙忍住，将哭声憋了回去。青小鱼是一个奋斗在都市里的勤劳上进的奋斗女，一心勤俭节约地存钱想着出一本自己的书。一次闺蜜可可带她去参加一场高大上的聚会，希望在宴会上认识个金龟婿。不料却结识了刚躲避黑社会大哥阿雄追杀至此伪装侨扮的伪富二代周辉，因而无辜卷入一场充满阴谋的局。周辉为从雄哥那里救下自己兄弟地瓜，跟雄哥商量设局坑骗青小鱼的钱来抵债。后青小鱼果然上当，导致输掉了所有积蓄。青小鱼还被姑妈扫地出门，流落街头。周辉心有所愧，于心不忍，后决心教青小鱼打德州扑克，让她去参加比赛赢取奖金以还清对她的亏欠。经过一段时间的训练，青小鱼报名了国际级扑克大赛，取得当市冠军的好成绩。成功从一条被人欺负的鱼逆袭成为女鲨鱼。It is more expensive to take the subway in Japan than in China. Take Nagoya as an example. The subway fare starts at 200 yen (adults), which is about RMB 12 yuan, and the most expensive is 330 yen (the fare for children is 100-160 yen).影片故事根据真实事件改编，詹姆斯·默里博士（梅尔·吉布森饰演）领导下的编委会要进行新版本的《牛津英语字典》的编辑，以当时的人力科技水平，完成字典的编撰要一个世纪才能完成，詹姆斯·默里博士开创性的采用了全民参与的方式，让全英使用英语的人一起为字典收集词条定义，并通过寄信的方式发送给编撰组。