If a process switches its real, effective, or saved uids from at least one being 0 to all being non-zero, then both the permitted and effective capabilities are cleared.
如果进程将它的真实、有效或保存的uid从至少一个0切换到全部非0，那么允许能力集和有效能力集都被清空。
For others (normal non-real-time processes), it is zero.
对于其他的(普通的非实时进程)，它为零。
Because of the real data does not obtain from normal incidence, hence, the radius formula of Fresnel zone for non-zero incidence angle was derived.
根据实际资料都不见垂直入射这一事实，推导了非零入射角条件下非涅尔带半径公式。
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