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许多不得志的年轻士子也都悄悄往北边去寻找机会。让尹旭心中涌起了狂喜。梁振干笑摇头：我想不通这事与杨参议有何关系。世上最锋利的刀是看不见的，傅红雪的刀便看不见，但他的刀并不是最锋利，最锋利的刀是时间。　　二十年前，一宗梅花庵外的灭门血案，轰动武林。二十年后，血案主角的遗孤傅红雪长大，万里追凶，在沉三浪暗助下，查出自己原来并非真正受害者的后人，但他的情人翠浓已为他牺牲了……? ? BusinessKey, workflowService.startProcess (key, businessKey, vars) is passed in when the service object executes the method; (Here vars is some variables that are optional according to the actual situation) BusinessKey generation rules: className + "." + objIdOvO 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.