Use AT89S51 single chip and real-time clock integrated circuit DS1643, designed an electronic clock system, realized the date, time display and reported time.

利用AT 89s51单片机及实时时钟集成电路ds1643，设计了一个电子钟系统，实现了日期、时间显示及报时功能。

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Explicated the structure and principle of work of ultrasonic launching and receiving circuit, presented the program frame and part program of the date processing.

并对超声波发射接收电路的硬件结构和工作原理做了较详细的说明，给出了数据处理系统程序框图和部分程序。

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This article discussed the relationship of the inductive current, the lever of electromagnetic field, and the loop circuit impedance by some test date concisely.

文章通过理论分析和试验数据，对感应电流与电磁场幅度及环路阻抗的关系进行了探讨。

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Patrick has had limited success in her part-time Nascar career to date on the JV Nationwide circuit.

FORBES: Joining Nascar Will Rev Up Danica Patrick's Income

The 2011 MLG Pro Circuit season was the 8th and most successful to date reaching more than 3.5 million unique stream viewers during combined Pro Circuit weekends.

FORBES: Major League Gaming CEO Sundance DiGiovanni Outlines New 2012 Season

There has been no announcement yet on whether the race will be held at a later date, though chairman of the Bahrain International Circuit Zayed R.

CNN: Bahrain Grand Prix canceled due to ongoing civil unrest