To improve the validity of user identity authentication mechanism, a two-double authentication model integrating positive authentication mechanism and negative authentication mechanism was given.
为了提高用户身份认证的有效性，给出了一个集成肯定认证机制和否定认证机制的双层认证模型。
When the deviation from the model is found, the system can determine the identity of the user.
当用户行为偏离特征模型时，利用基于最小风险的贝叶斯判别法，可以实时有效的判断出用户的身份。
When the deviation from the model is found, the system can determine the identity of the user.
当用户行为偏离特征模型时，利用基于最小风险的贝叶斯判别法，可以实时有效的判断出用户的身份。
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