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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.讲述主人公与书籍们的故事，读者能够赋予书籍生命，而书籍能够让读者生活充满色彩。小戏骨《洪湖赤卫队》是以王玉珍主演的《洪湖赤卫队》为蓝本改编，讲述1930年湖北沔阳县委为配合红军行动，暂时把赤卫队撤离彭家墩。彭家墩恶霸彭霸天趁红军转移暂离洪湖之际卷土重来。洪湖赤卫队在乡党支部书记韩英和队长刘闯的带领下，与敌人展开了艰苦曲折的斗争。韩英不幸被捕入狱。面对敌人的威逼利诱，韩英始终坚贞不屈。赤卫队最终打回彭家墩，消灭了保安团和地方反动武装，红旗又在洪湖上迎风飘扬。但是想到自己迟早要做站，所以留到现在，准备首发在启明上。本剧改编自ABC News/ABC Radio的同名播客，讲述Elizabeth Holmes及她的公司Theranos如何崛起及坠落。雅间内，少女们都禁不住红了脸——正是怀春年纪，看见这样的少年人物，怎不砰然动心。是啊，要到七八点才放映，现在时间还早着了。