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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.郑森接任期间，凭着回忆父亲年轻时的创业经历，解除了一次又一次的危机。与此同时，之前与家人的往事也渐渐涌上心头，郑森觉得自己与父亲恍若隔世相逢。慢慢的，他开始体谅对自己无故疏远的父亲。然而，一个巨大的危机正慢慢逼近，更危害到郑家众人的性命……郑森必须力挽狂澜，以潮州人精神奋斗到底！平凡的中学生鹿目圆（悠木碧 配音）有一个美满的家庭，在生活中她是个性格温顺又有爱心的好孩子。转学生晓美焰（齐藤千和 配音）的出现打破了小圆平静的生活，这个性格酷酷又体弱多病的黑长直少女似乎对小圆有着什么难言之隐。命运中的相遇出现了，小圆在路边救下了一只浑身是伤的奇怪动物，没想到这只动物居然会说人类的语言。它告诉小圆它的名字叫丘比（加藤英美里 配音），并且提出了一个特殊的要求，它希望小圆能够和它签订契约成为魔法少女。张槐心疼了，比郑氏更快一步坐到闺女身边，柔声安慰她。First presentation page (test):饱受嫌弃的处女座无名编剧李凯（贺刚 饰），因千年单身狗身份而被批作品缺少生活；某知名杂志副本主编，大龄剩女白羊座刘夏（萧蔷 饰），因应付从东北逼婚的父母，二人不得以假扮情侣，同居生活。当白羊座野蛮女友碰上处女座贱嘴男，会发生怎样的火花与泪花呢？