The error analysis of different empirical formula of friction factor is done and the applicable range of these formula is given as well.
笔者对计算摩擦系数的一些经验公式进行了误差分析，对经验公式的应用范围提出了个人的看法。
The analysis results show that it is an effective method to reduce the probability of error of the system by increasing the pulse broadening factor.
结果表明，通过增大脉冲展宽因子可以有效降低该系统的误码率。
The analysis results show that it is an effective method to reduce the probability of error of the system by increasing the pulse broadening factor.
结果表明，通过增大脉冲展宽因子可以有效降低该系统的误码率。
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