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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.位于热带海域的一座无名小岛，蔚蓝大海与金色沙滩接壤之初，飞机破碎的残骸伴随着遇难乘客的恸哭哀号，揭开了一个神秘故事的序幕。2004年，815航班在前往目的地的途中突遭变故，坠毁在这座小岛，机上仅有杰克·谢帕德（马修·福克斯 Matthew Fox 饰）、凯特·奥斯汀（伊万杰琳·莉莉 Nicole Evangeline Lilly 饰）等48人侥幸逃生。最初的惊恐过后，不同年龄、职业、国别、民族、背景的一群人，在这个与世隔绝的逼仄且食物紧缺的空间内不可避免发生冲突与碰撞，与此同时，小岛上似乎还隐藏着某种未知且极具威胁的生物，而他们的一举一动又仿佛被一双双充满智慧但又神秘莫测的眼睛所监视。3. Antiplatelet drug antiplatelet therapy is an important part of the prevention and treatment of thromboembolic diseases, especially in white thrombosis such as arterial thrombosis. Drugs that have been used clinically for many years and can prevent platelet adhesion, aggregation and release, thus preventing arterial thrombosis, are called antiplatelet drugs. The mechanism of action is that the occurrence of thromboembolic diseases is firstly caused by various pathogenic risk factors damaging endothelial cells, causing blood cells to adhere and aggregate, activating platelets and releasing various vasoactive substances, such as TXA2, 5-HT-TG, etc.包括渔民的船只都已经被暂时被征收了，当然越王仁厚。(1) Normal detection of contacts. The normal detection of contacts refers to the detection of contacts when the control coil is not energized. The normally open contacts are open with infinite resistance, and the normally closed contacts are closed with resistance close to 0. The normal detection of the normally open contacts of the time relay is shown in the following figure.3. The higher the strength of the main attribute, the betterThe investors are also very sympathetic when they see those investors stepping on thunder. However, stepping on thunder does not mean that money is gone. What can investors do?