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OvO pairs the N classes in pairs to generate N (N-1)/2 binary classification tasks. For example, OvO will train a classifier to distinguish classes Ci and Cj. The classifier takes the Ci class sample in D as a positive example and the Cj class sample as a counterexample. In the testing phase, the new samples will be submitted to all classifiers at the same time, so we will get N (N-1)/2 classification results, and the final results can be generated by voting: that is, the category that is predicted most is taken as the final classification result. Figure 3.4 shows a schematic diagram.李敬文不理这帮家伙。该电影以两名陷进“危险游戏”（如对路人进行无差别的暴力攻击）的青年的故事为主轴，以群像剧的方式刻画了年轻人的欲望与癫狂。回家过圣诞节是为了拯救这个节日。查明是谁在门后。之前《绝代双骄》电视剧爆出种种负面消息，虽然陈启一篇文章，扭转了整个舆论，大众都表示会支持《绝代双骄》电视剧。ChannelIdThe strategic perspective of the financial industry can and should be widely extended to all walks of life.