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- The suggested system consists of high frequency(HF) resonant inverter,HF transformer and HFAC pulse density modulation (PDM) converter. 该系统由高频谐振逆变器、高频变压器和高频交流脉冲密度调制变频器组成。
- A novel topologic structure of high frequency AC pulse density modulation converter is proposed,and its operation principle,control scheme and design are described in detail. 提出了一种新颖的高频交流脉冲密度调制变频器的拓扑结构，并详细阐述了工作原理、控制方案和设计方法。
- The selection rule of the hysteresis width has been developed in order to make the THD and RMS value of the output voltage to be the best with high efficiency, according to the principle of pulse density modulation. 根据脉冲密度调制技术的原理导出了使输出电压失真度最小、有效值最大，系统效率也较高的环宽取值公式。
- This controller integrates pulse width modulation(PWM) and pulse density modulation(PDM) together,and can easily change between the two modulations. 该设计集成了脉冲宽度调制(PWM)和脉冲密度调制(PDM)两种调制方式,并可以在两者间切换。
- Density modulation produced by ultrashort laser pulses and the phase reflection induced in underdense plasmas 激光脉冲诱导的等离子体密度调制及其产生的相位反射
- The Design and Simulation of Electric Vehicle Drive System with High Frequency AC Pulse Density Modulation 电动汽车高频交流脉冲密度驱动系统的设计与仿真
- Theoretical and numerical studies of density modulated whistlers 密度调制啸声的理论和数值研究
- The density of population in this city is very high. 这个城市的人口密度非常高。
- The area had a population density of five people per square mile. 该地区人口密度为每平方英里五人。
- PDM (pulse density modulation) 脉冲密度调制
- pulse density modulation(PDM) 脉冲密度调制（PDM）
- high density modulation 高密度调制
- General inflection or modulation of the voice. 抑扬声音的一般性的起伏与变化
- pulse density modulation 脉冲密度调制
- The density goes down exponentially with height. 分子密度随着高度的上升而指数衰减。
- The population density is evened out. 种群密度亦趋于均匀化。
- Our fifth concern is with modulation noise. 我们要讨论的第五个问题是调制噪声。
- The modulation works like an on/off toggle switch. 调制工作类似于板手开关。
- A modulation, especially a brief one. 转调转调，尤指临时性的
- Density exceeded 100 nests per mile. 丝巢密度超过每英里100巢。
