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。
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