The system generates a direct current, so using it to power DC devices locally is more efficient than switching to the alternating current needed to feed it back to the grid.

该系统产生的电流为直流电，所以用来驱动本地的直流点装置比将其转化为交流电输入电网来的更有效率。

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The paper discusses and probes into the application of adaptive control in mine hoist direct-current velocity modulation system.

本文对自适应控制在矿井提升机直流调速系统中的应用进行了研究和探讨。

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One of the high performance direct current PWM control system based on TMS320LF2407A is introduced.

介绍了一种基于TMS320 LF 2407a的高性能直流pwm控制系统。

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Its high-voltage direct current system is delivering electricity to the British Petroleum platform in the middle of the ocean.

FORBES: Magazine Article

The cost-lowering potential of direct-payment practices is heartening because the current third-party payment system has failed to stem our burgeoning health cost crisis.

FORBES: Fed Up With Obamacare, Doctors Increasingly Prefer Cash For Care