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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.故事从《监察医牵牛花》最后的第二年春天开始拉开帷幕，牵牛花一个人来到东北寻找母亲的遗体，故事由此展开。她深刻面对东日本大地震和母亲的死亡，与前作中无法描绘的东日本大地震以外的大规模灾害相对应的姿态被截取下来。大姐夫？李敬文被他惊得一个趔趄，差点摔倒。《饥饿游戏》《断头谷》妹子Amandla Stenberg将与《侏罗纪世界》《夏日之王》小哥Nick Robinson搭档，主演畅销青少年小说、去年曾是纽约时报青少年小说销售榜第一的"Everything Everything"的电影版，前者已定出演，后者接近正式签约。讲述女孩Maddy患有重症联合免疫缺陷，这种罕见病让她几乎对一切东西过敏，17岁的她一直躲在家里，接触的人只有妈妈和护工。但当男孩Olly搬到隔壁，她爱上了他。而Olly也有自己的“恶魔”需要面对。米高梅公司在艾米莉亚·克拉克和山姆·克拉弗林主演新片、同样改编自畅销小说的《遇见你之前》取得票房成功后，推动了这个最新项目。将由新人导演&编剧Stella Meghie执导，预计9月开拍。杨公子，您当真受封了？什么杨公子。上个世纪五十年代末期从海外归国，到了一所名叫月亮湾的乡村小学任教。走过了大跃进、文革、新时期、新世纪等不同的历史时期，经历了刻骨铭心的初恋，到结婚生子，直到成为一名白发苍苍的老头……是坦诚无畏，是温柔如歌！是风华正茂，是未来可期！是初生牛犊不怕虎，是明知南墙也要撞！湖南卫视中国新一代青少年健康成长心理释放表述节目《少年说》第五季再次集结！少年们，勇敢说吧！