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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.在一个晴朗舒适的好时节，尼尔瑞家的两兄弟肖恩（巴勃罗·施瑞博尔 Pablo Schreiber 饰）、麦克（亚伦·斯塔顿 Aaron Staton 饰）以及麦克的妻子威特（瑞安·施密特 Wrenn Schmidt 饰）驱车来到某个静谧的自然保护区打猎。这里是两兄弟童年一曾玩耍的地方，而今物是人非，三人和谐融洽的表象下，总有暧昧尴尬的情愫流动。难熬的一天即将结束，他们相继入眠。当第二天醒来时，他们的帐篷、行李、刀枪乃至宠物狗均被人偷走，而且三人的额头上还被画上了叉。麦克怀疑肖恩从中搞鬼，更对哥哥和妻子之间的暧昧表示强烈不满。2. Weight: Meet the body mass index standard for civil aviation pilots;Indonesia's advertising pictures are even worse.Article 5 [Departmental Responsibilities] The medical security administrative department of the State Council shall be in charge of the supervision of medical security funds throughout the country, while other relevant departments of the State Council shall be responsible for the supervision of relevant medical security funds within the scope of their respective duties.