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Category division is specified through the Coding Matrix. There are many forms of coding matrix, the common ones are binary code and ternary code. The former specifies each class as a positive class and an inverse class respectively, while the latter can specify "disabled class" in addition to the positive and inverse classes. FIG. 3.5 shows a schematic diagram. In FIG. 3.5 (a), classifier f2 takes samples of Cl and C3 as positive examples and samples of C2 and C4 as counterexamples. In FIG. 3.5 (B), classifier f4 takes the samples of C1 and C4 as positive examples and the samples of C3 as counterexamples. In the decoding stage, the prediction results of each classifier are combined to form the code of the test example. The code is compared with the corresponding codes of various types, and the category corresponding to the code with the smallest distance is taken as the prediction result. For example, in Figure 3.5 (a), if based on the European distance, the prediction result will be C3.一个平凡的初中女孩蓝漠，得到了一朵神奇的头花，带上头花会立刻变得美丽无比！后来蓝漠发现她的死党刘亦锋在乎的不是她的外貌，而是她天真纯洁的心。于是她丢掉了头花，头花被毁后，蓝漠陷入了昏迷，刘亦锋非常担心，想要救醒蓝漠。于是他跟着魔术师希斯坐着巨型雪熊到了冰天雪地的珀山，掉进了一个黑漆漆的洞穴，发现一头犬兽想要吃掉蓝漠！后来他们发现犬兽其实是个人形神医，神医救醒了蓝漠。与此同时，帅哥夏安与美女林天歌出现，令他们的生活越来越扑朔迷离。PS: I tried Chrome, IE11, Firefox, and it was all the same.Step 2: Study User Needs　　原来，警方已然发出警告，正在这个神秘的小岛上通缉一对2. If radar equipment is equipped and usable, it shall be used correctly, including long-distance scanning, in order to obtain early warning of collision risks, and radar plotting or equivalent systematic observation of detected objects.