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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.严世藩这个人，杀他一百次都是不为过的。1. "Mast Light" is a white light designated to be placed above the centerline of the head and tail of the ship. It displays uninterrupted light in a horizontal arc of 225 degrees. Its device is to display the light from the front of the ship to 22.5 degrees behind each side.在文化街派出所管区，文艺团体林立，商贾小贩云集，各类批发市场众多，昔日高雅去处的文化街现在成了鱼龙混杂的闹市，独特的地理位置，使这个地区的治安状况日超复杂。越狱是由福克斯公司出品的，桑福德-布克斯塔弗导演的美国电视连续剧，该剧由温特沃思·米勒和多米尼克·珀塞尔等人主演，共4季，于2005年8月起上映，讲述的是一个关于拯救的故事。