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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.十八层地狱与之一比，都是不值一提。《东北灵异录》以农村诡异事件为主题，讲述了村里的得道高人老王与其义子降妖除魔的故事，由于老王有感知灵异的能力，所以每当村里有灵异的事件，老王都会在第一时间有心里感应，并携其义子将其化险为夷，直到有一天，村里的强拆大队打翻了钉子户家狐仙灵牌，狐仙复活了，并开始了她的杀戮，而老王也迎来了他人生中的重大挑战,就这样一场魔与道之间血海恶战势在必行，究竟鹿死谁手....故事发生于1990年（黑人领袖Nelson Mandela坐监狱就快被释放），一个出生于普通家庭背景的小男孩叫John Milton（Troye Sivan饰）。他获得了奖学金，在南非一个精英私人学校读书。他要适应新学校与新家。他品行兼优，但却与这里的“问题学生”格格不入。但通过英语文学老师Guv（John Cleese饰）帮助下与一系列努力之后最后得到认可。女子沈月牙为了救父亲参加秀女，在偶然间得到一个“小叫花子”的帮助，使其在众多美貌与才智都高于自己的秀女中脱颖而出，成功进入京城参加最后的选秀，可是在整个过程中遭遇到了重重危险，竟然都被不可思议的化解了。就在月牙姑娘最危险的时候，小叫花子又出现了。在互透情意的时候小叫花子的真正身份也已经暴露，他们俩的感情结局会怎么样呢，月牙还会不会成功当上五彩金凤？最后，通过小叫花的帮助，沈月牙如愿以偿的当上了太子妃，而真正的太子——小叫花，也向沈月牙公布了身份，这次身份的公布，也使观众了解了之前的假太子剧情的由来。几位不为民办事的大贪官也被依法严惩。月牙和太子终于有情人终成眷属。随着时间的酝酿，大众对《武侠世界》的期待也越来越浓。小葱里外张罗，将所有人手都调派起来，又跟赵家、郑家知会商量过，终于将来客一一安置妥当。