1) Density modulation
密度调制
1.
It is shown theoretically and by particle- in-cell simulations that the plasma density modulation produced by laser in underdense pre-plasmas can serve as a Bragg reflector, which results in phase reflection occurring at low-density plasma area.
理论研究和数值模拟研究表明激光在等离子体中诱导的等离子体密度调制可以起类似布拉格反射镜的作用,使得后面的入射光在等离子体平均密度远低于临界密度的区域就对入射光产生相位反射。
2.
It is shown theoretically and by particle-in-cell simulations that the interfering fields of the incident and reflected laser pulses can produce deep plasma density modulations in underdense pre-plasmas.
理论研究和数值模拟发现入射光和反射光在低密度等离子体中形成的干涉场可以产生深度的等离子体密度调制。
3.
The computation is clarified for the electron beam density modulation in optical klystron on storage ring free electron laser with three different methods,and the effects of electron beam parameters on density modulation are also studied.
在文［１］讨论了电子束能量调制的前提下，讨论电子束在光速调管中色散段的密度调制，以及诸多因素对密度调制的影响。
2) HDM High Density Modulation
高密度调制
3) pulse density modulation(PDM)
脉冲密度调制(PDM)
4) pulse density modulation
脉冲密度调制
1.
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。
5) PDM
脉冲密度调制
1.
The paper presents the design of high performance AGC module based on pulse density modulation (PDM) technology in digital television demodulator to overcome the shortcoming of traditional AGC based on pulse width modulation (PWM).
针对传统的基于脉冲宽度调制的自动增益控制的不足,提出了一种用于数字电视解调芯片中基于脉冲密度调制的高性能自动增益控制设计方案。
2.
According to soft switching resonant theory, a novel control strategy of the pulse density modulation (PDM) for threephase high frequency AC (HFAC) cycloconverter is proposed.
根据软开关谐振理论,对三相高频交流交交变换器,提出了一种新颖的脉冲密度调制(PDM)的控制策略,并采用PDM控制策略建立了变换器的数学模型和仿真模型,分析了变换器输出波形。
3.
The principle and characteristics of PDM(Pulse Density Modulation) signal are introduced.
介绍了脉冲密度调制(PDM)信号的原理和特点,比较了基于梳状滤波和基于频域滤波的解码算法、性能和计算复杂度。
6) microwave density modulation
微波密度调制
补充资料：非密度制约因素(见密度制约因素)
非密度制约因素(见密度制约因素)
l焦非密度制约因素见生态因素、密度制约后
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条