When the tree is built, it may be pruned using cross-validation procedure, if need.
当树建好之后，如果需要的话，可能需要用交叉验证来进行剪枝。
Do I use the same idf from training set to perform cross validation?
我使用相同的国防军从训练集进行交叉验证吗？
Meanwhile, the protocol certificated its own fairness on the basis of right cross validation.
最后证明了在交叉验证理论可证明正确的前提下，协议具有公平性。
Path construction and path validation for cross-certification.
交叉认证的路径构造与路径验证。
Path construction and path validation for cross-certification.
交叉认证的路径构造与路径验证。
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