The control system is composed of AT89C52, a high-powered 8-bit microcontroller, data gathering circuit, real time circuit, data output circuit and system watch circuit.

本控制系统以高性能8位单片机at89c52为核心，结合数据采集电路、信号输出电路、实时时钟电路、系统监控电路组成。

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It proves that it is superior to use the "deviation input" to the "absolute-value input" and better to use time circuit with variable time constant than to use square circuit.

为全面实现以上原则通过理论分析指出采用偏差输入将优于采用绝对值输入； 采用时间常数可变的时限电路将优于采用平方电路。

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As a try for circuit standardization, the system realizes the standard protection circuit unit and recovering-time circuit unit, which are connected to system through standard 44 pins' bus interface.

作为标准化的尝试，本系统实现了标准的保护电路单元和恢复时间电路单元，通过44芯总线插座与标准总线接口连接。

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It would be weeks before he could catch another flight home, but the delay gave him time to hike the Annapurna Circuit, a 14-day trek through the Himalayas.

VOA: standard.2009.12.13

"Singapore is a night time circuit, which none of us have experienced before, but we'll be OK, " the English driver added.

BBC: Hamilton eyes error-free run-in

The Australian was unable to replicate his earlier form in final practice where he set the fastest-ever time at the circuit of 1:29.527.

BBC: QUALIFYING POSITIONS

Does she really honestly think she can just scrape by without spending any time off the publicity circuit?

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