The principal component analysis implements the column-wise compression, using the correlation between attributes.
主成分分析使用属性之间的相关性实现按列压缩。
Principal UUID: the UUID of the principal whose security attributes are described in PAC.
主体UUID：一个主体的UUID,PAC中描述了该主体的安全属性。
These security attributes are the principal identity and the group information.
这些安全属性包括主体身份和组信息。
An outlier detection algorithm based on principal component analysis and the sum of attributes distance is proposed.
提出了一种基于主分量分析和属性距离和的孤立点检测算法。
The principal component analysis extracts the principal component and implements the column-wise compression, using the correlation between attributes.
主成分分析利用属性间相关性，提取主成分以实现纵向压缩；
The principal limitation of these approaches is that the attributes of the tasks have to be known.
这些算法的主要特点是，它们均要求被调度任务的特征参数为已知条件。
The principal limitation of these approaches is that the attributes of the tasks have to be known.
这些算法的主要特点是，它们均要求被调度任务的特征参数为已知条件。
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