1) quadric difference frequency
二次差频
1.
The realization mode of solving ambiguity for multiple frequency ranging usually has two kinds:quadric difference frequency and uneven dual frequency.
多频测距解模糊的实现方式通常有两种 :二次差频和参差双频 。
2) double frequency-difference ranging
二次差频测距
3) secondary frequency regulation
二次调频
1.
This paper describes the relationship between the hydro-turbine governor and the grid load frequency control, analyzes the functions, the static and dynamic characteristics of the governor in grid primary and secondary frequency regulation.
文中叙述了水轮机调速器与电网负荷频率控制之间的关系,分析了调速器在电网一次调频、二次调频中的作用、静态特性和动态特性;通过建模、仿真及现场试验,提出了机组并联于大电网工况下的调速器PID参数整定范围和应有的机组功率控制模式。
2.
Through the software primary and secondary frequency regulation, the system complete the frequency regulation work in isolated power grid and guarantee the operation stabilization of the plant.
本文介绍了DEH系统功能原理,根据大连西咀热力有限公司孤网运行特点,采用软件一次调频和二次调频两种方式,成功地完成了孤网运行的调频任务,达到了稳定运行的目的。
4) secondary mixing
二次混频
1.
A simple phase measurement technique of high resolution, the secondary mixing, is presented.
给出一种可用于纳米精度测量的二次混频测相技术，着重设计了其中的频率合成器。
2.
A combination method based on secondary mixing and MTD(Moving Target Detection)processing is proposed for high-speed targets detection in linear frequency-modulated continuous wave(LFMCW)radar.
针对LFMCW雷达高速运动目标的检测问题,本文提出了一种二次混频与MTD处理相结合的方法。
3.
The theory and scheme of the Doppler allowance extension using the method of secondary mixing were offered and validated by simulation.
在对伪码调相引信多普勒容限扩展必要性进行分析的基础上,研究了多普勒容限与引信主要参数间的关系,提出了用二次混频的方法扩展多普勒容限的理论和设计方案,并通过仿真进行了验证。
5) double-conversion
二次变频
1.
This paper introduces a novel scheme of frequency conversion,using single local oscillator to achieve double-conversion.
介绍了一种新型的变频方案,采用单本振源即可实现二次变频,还能保留传统二次变频方案的优点,简化了本振源的实现,有利于小型化和集成化。
2.
This paper begins with the comparison of single-conversion receiver and double-conversion receiver architectures, from.
本文通过比较一次变频接收机和二次变频接收机这两种不同的调谐器架构,引出了在数字电视调谐器中使用上变频混频器的基本背景和必要性。
6) Second harmonic generation
二次倍频
补充资料：输出反馈(见线性二次型次优控制)
输出反馈(见线性二次型次优控制)
output feedback
3h日c卜口fon以以{输出反馈型次优控制。(output王eedbaek)见线性二次
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