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(2) Motor boats of less than 7m in length and of a maximum speed of not more than 7 knots may display a white ring light in place of the light required in paragraph 1 of this regulation. Side lights should also be shown if feasible;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.正当他想着身边如何多出一份力量来对付尹旭的时候，这愿望还真就达成了。吴老太惨然笑道，你这一辈子，不该这么活的。见爹娘过来，小葱忙说自己没事了。屠龙刀和倚天剑被周芷若偷去，她现在武功暴涨，肯定是得到了屠龙刀和倚天剑的秘密。两人吩咐了随侍的宫女侍卫便离开了。