KPMG's British firm has introduced time codes so that employees can account for how long they spend dealing with staff matters.

毕马威(KPMG)英国公司已经引入了时间编码，用来计算员工在职工事务方面所耗费的时间。

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Based on cyclic diagonal codes, an improved design of unitary space-time codes (USTC) at low SNR is proposed.

在低信噪比情况下，提出了一种基于循环对角码的改进的酉空时码设计。

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On the symbol detection of layered space time codes, it is assumed that the perfect channel estimations are available at the receiver.

提出一种基于旋转不变子空间的垂直分层空时码及其直接信号检测算法。

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The investigation came after NHS Lothian was found to be manipulating waiting time codes in 2011, although ministers said the practice was not widespread and that concerns raised in the Audit Scotland report were "historical".

BBC: Ministers accused of 'secretly dropping' A&E waiting target - BBC News

Sony is refining what we can do, (Dust514), while Microsoft is refining how we can pay, (DRM, banned accounts, one time use codes, ect).

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Fingerprint scanners and devices that generate time-specific codes offer greater security, but they require hardware.

ECONOMIST: Online security