The study of cross-validity showed that the discrimination for 236 families through discriminate model accorded with the types of their children's evaluation by the degree of 97.5 %.
交叉效度研究表明，使用判别模型对236个家庭的判别与子女评价所作的分类进行比较，结果有97.5%的一致。
However, the realization of PKI is faced with many complicated problems such as certification management, validity, revocation, cross certification etc.
然而PKI的实现却面临着诸如证书管理、验证、撤销、域间交叉认证等许多复杂问题。
Lastly, the validity of the model is also testified by the cross-validation method.
最后，利用交叉检验法验证该模型的正确性。
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