The measurement accuracy control, hardware design and software engineering preparation method are from the projecting practice, which provides some reference and practical value.

其中计量精度控制方法、硬件设计方法和软件编制方法来自于工程实际，有一定的参考和实用价值。

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Conclusion The EVA-based software measurement can be used in all life cycle. It is effective and practical.

结论EVA可在软件开发的全寿命周期中采用，该方法是实用而有效的。

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And also analysed the theory, software and hardware circuits of system. Using a software algorithm of temperature compensation in practical measurement, the precision degree can arrive 0.1%fs.

分析了系统设计的理论依据和软硬件实现方案，采用温度补偿算法使补偿后的精度等级达到0 1% FS。

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