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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.2. Graduates with bachelor's degree or above: They are required to have a good foundation in English listening and speaking and pass the National English Test Band 4 or Band 6 (with a score of 425 or above).1. In communication, stars, as the "OpinionLeader" of the target audience group, can have personal influence on the target group. People who are active in the interpersonal communication network and often provide information, opinions, or suggestions to others and exert personal influence on others are called "opinion leaders". They can often use their professional knowledge and persuasion ability to influence others. Their charisma is characterized by dominance, self-confidence and strong persuasion ability. Stars are people who choose to have influence in the public domain and have high credibility. They are usually stars, experts, singers or researchers in a certain field. In order to achieve good results in mass communication, we must first attach importance to the existence of these opinion leaders.Copyright huicong.com Beijing ICP Certificate 010051 General Website: hc360按规定。/thank当时尹旭一直忙着征战的事情，根本没有空打理自己的封地，但是偌大的封地既然有了，就不能这样荒芜着。