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(2) A hard replica of the international signal flag "A", the height of which shall not be less than 1 meter, and measures shall be taken to ensure that it can be seen around.随后入夜，打来打去也不知道情况了，如今好歹有船接近接应，该是好事。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.If you have few contacts, you can only rely on your own little perseverance. After locating the target customer, we must introduce the advantages of the product to the customer over and over again, and explain the advantages of the product over and over again. Only by sticking to it can we reach cooperation with the customers who really need it and find the target customer.3. Use anomaly detection讲的是前世今生的鬼故事，男主前世是个皮影戏艺人，今生是大明星，他老屋有只鬼一直缠着他不放，要杀掉和他在一起的所有女人