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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.投资大佬A联合一线网红PA先生在号称宇宙第一招标会现场被黑客入侵，转天一个名为“网红猎人”的微博账号爆出一系列PA先生与幕后资本勾结愚弄大众的系列黑幕，同时声称对入侵发布会“负责”，顿时舆论哗然，“网红猎人”由此进入公众视线，并宣布会定期爆料网红圈的惊天黑幕，一时间网红江红人心惶惶，人人自危。 　　一间毫不起眼的街头书店里，暗门被打开，三位年轻人走了进去，网红猎人的LOGO赫然在目，暗处的3D投影亮起，一个模糊的背影出现在幽暗的空间里，书架上的老式收音机开始沙沙作响，不久传来低沉的女声：猎人们，你们的下一个目标是…… 　　从此，网红江湖里出现了一个名为：“网红猎人”的神秘组织。　　一次, Celia 跟死去男友的重要信物破损, 被压抑的惰伤一触即发, 四女才开 _始认真地了解对方, 明白大家都背负着不同的周去, 但同样捉不到爱情:Celia 因痛失恋人而无法再爱, 　　　秦淼方才恨恨地住手。一想到这里，苏岸就忍不住有些颤，若真是如此事情可就有些麻烦了。22, write too much, Take up a certain amount of working time, Like our cashier foreman, in order to reduce customer complaints and ensure that the cashier does not stop during the business period, It is convenient for customers to make payment, Every day, I have to replace the cash table to go to the toilet, change small change, check the discipline of the cash table, Handle all kinds of emergencies during the cashier's cashier's cashier's cashier, It does not regularly supervise and standardize the cashier's collection process at the cashier's desk, The time to write is limited, and our work is our daily work. We also don't know what to write. Our work plan is basically to sum up the shortcomings and problems of last month to make the work plan and training plan for next month. I don't know where to start after writing for half a year.The code for creating iframe and div for the following tests is as follows: