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悲愤与苦闷……杨长帆盯着这幅字，竟毫不犹豫接下了这句话。华灯初上的香港，异彩纷呈的模特决赛吸引了众人的目光。清新美丽的模特李菲菲已经被宣布为冠军得主，就在她的纤细的手指触到奖杯的一刹那，意外发生了--关于她丑闻的传单在会场中如雪片飘扬，李菲菲的冠军梦也随风而逝……队长马如龙（成龙）执行公务时遭人陷害，愤而辞职。海盗头目罗三炮（狄威）抓走官兵家眷做人质，当局决定利用内线周永龄从中调停。因为早知周永龄与海盗勾结，马如龙自告奋勇拯救人质，他重组水师，制定了A计划，期望通过与上司洪天赐（元彪）及好兄弟卓一飞（洪金宝）作里应外合，将海盗一网打尽。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.很快他们就知道了。The "deliberate practice" introduced in this book is based on purposeful practice, but on top of this, there is more emphasis.