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2. Is adsorption effective? Bamboo charcoal, activated carbon, sachets, etc., can be placed in the car? For a period of time, valid? In the car? Odor.遵循“行尸走肉”明星和摩托车爱好者诺曼·里德斯为他打开道路探索当地的自行车文化和庆祝的最好的和最聪明的收藏家。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.郑氏今天闹这么一场可不是想出风头，一为震慑，二为打草惊蛇，三来造势，要把这事闹大。