Danfoss Variable speed driver can drive the permanent magnetic motor via open-loop or close-loop method.

丹佛斯变频器可以开环或闭环方式驱动交流永磁同步电机。

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On the basis of analysis of block diagram of AC speed driver system with speed and slip ratio double closed loops, a system design method is presented with the four quadrants experiment results.

在分析转速、转差双闭环交流调速系统动态结构图的基础上，提出了系统的设计方法，并给出了四象限运行实验结果。

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When the driver accelerated, the vacuum was insufficient to run the intermittent mode and the wipers would default to high speed.

当司机加速时，真空不足以运行间歇模式，雨刷将默认为高速。

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A special vibrating vest worn by the driver provides information about the vehicle's speed.

VOA: special.2009.11.03

The driver tried for a speed of about eight kilometers an hour.

VOA: special.2010.04.26

Where a non-Urfa driver might speed up or slow down, it seemed, an Urfa driver preferred simply to honk his horn.

NEWYORKER: The Sanctuary

The manufacturers are also developing adaptive cruise control, which can automatically maintain a safe speed and distance from other vehicles, and intelligent speed adaptation, which can, in its most active form, prevent a driver exceeding the speed limit.

BBC: How close are we to a crash-proof car?

"High-speed internet is the biggest driver of growth for the cable companies right now, " says Amobi.

FORBES: Turning On Cable Stocks