The system shown in Figure 3 is that of a closed loop, with sensors feeding the control system that drive changes in the environment.

图3所示的系统是一个封闭循环，传感器负责为控制系统提供数据，而控制系统则驱动着环境中因素的变化。

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Projects should be governed using a control loop to drive project variance to zero.Figure 8: project governance control loop.

应该用控制循环来管理项目，促使项目方差为零。

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A kind of the pulse control mode, the drive and motor closed loop, but not to the numerical control system, the feedback device, in a sense, can open loop control called the servo control.

一种采用脉冲控制方式，此种驱动器与电机闭环，但不反馈到数控系统，这种驱动器在某种程度上可称为开环控制的伺服控制。

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Backtrack and drive up Steens Loop Road to the mountain's eastern rim, which drops off in a mile-high rock cliff.

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Which will drive more demand for cheaper hardware, dooming the manufacturers to a feedback loop of smaller margins and cut-throat competition as they continue to gift Google with millions active users.

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