脉冲占空比是指高电平在一个脉冲周期中所占的比例。
介绍了两种常用的红外遥控信号的编码方法：脉冲占空比编码调制，脉冲宽度编码调制。
Introduces two usual remote control signal encoding methods: pulse width modulation, pulse space ratio modulation.
研究了脉冲电镀在微氰镀金，无氰镀金体系中脉冲频率、脉冲占空比对镀金层耐磨性的影响。
The effect of pulse frequency and pulse duration ratio on the abrasion resistance of gold coatings is investigated with pulse plating in cyanide free and trace cyanide baths.
综合两次MTD结果得到了目标的实际速度，并推导出了脉冲占空比和速度测量误差的关系式。
By synthesizing twice MTD results, actual velocity of the target is gained. Relation between pulse duty ratio and velocity measurement error is deduced.
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