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OVR trains N classifiers by taking samples of one class as positive examples and samples of all other classes as counterexamples at a time. If only one classifier predicts a positive class during the test, the corresponding class mark will be taken as the final classification result. As shown in FIG. 3.4, if multiple classifiers predict as positive classes, the prediction confidence of each classifier is usually considered, and the category mark with the largest confidence is selected as the classification result.For example, we often validate forms, such as the registration login dialog box. We need to validate before logging in: for example, there are the following logics:谁叫他们想娶人家闺女呢。Second, SYN attack principle梅莉(Vill)原本是刁蛮任性的富家大小姐，父母先后身亡后，梅莉恶习难改，变本加厉。仙境天使得知后，决定给她一个教训来帮助她悔悟。于是每到日落时分，梅莉就会化身为青鸟，除非她能在三个月内做到：存善念，行善事；先人后己，舍己利人；得到一个男子的真爱之吻，否则她将永世化身青鸟。究竟梅莉能否破除咒语？在这期间又会发生怎样的意外？【续订】CBS正式公布秋季档续订名单Threads a > A and B enter the first if judgment at the same time. B > A enters the synchronized block first, and since instance is null, it executes instance=new Singleton ();