1) FM radio
调频电台
1.
An experimental FM radio based non-cooperative bistatic radar is briefly described,and two related key techniques,i.
简要介绍了基于调频电台非合作式双基地雷达试验系统的组成,解决了两个主要直达波对消和目标检测问题。
2) Frequency modulation
调频
1.
The research of frequency modulation system of the medium frequency generator;
中频发电机调频系统研究
2.
Research on continuous frequency modulation of semiconductor laser by varying the length of external cavity;
半导体激光器外腔长连续调频特性的研究
3.
Research on Rotor-bearings System Nonlinear Dynamics Behaviors, Fluid-solid Interaction and Its Frequency Modulations;
轴承—转子系统非线性动力学行为及其耦合调频技术研究
3) FM
调频
1.
Simulation and Analysis of Nonlinear FM Output Function of AD9854;
AD9854非线性调频输出功能的仿真与分析
2.
The Development of FM Transmitter Based on PLL;
锁相环调频发射机的研制
3.
A low frequency high power FM scanning acoustic beam transmitting system;
一种低频大功率调频声波束扫描发射系统
4) frequency regulation
调频
1.
Electromagnetic Oven Control System Based on the Frequency Regulation Mode;
基于调频方式电磁炉的控制系统
2.
The frequency regulation has been modified;The "press deviation dragging load"loop has been designed in order to limit the response speed of turbine valve;The direct Energy Balance(DEB) strategy has been replaced by Indirect Energy Balance(IEB) strategy;Fuel feedforward has been used to compensate the time delay of the CFB boiler.
在分析河北省保定热电厂原协调控制策略的基础上提出了改进措施:完善了一次调频功能;设计了汽机侧的“压力偏差回拉功率”回路,以限制汽机侧调门的动作速率;将直接能量平衡策略改为间接能量平衡策略;为克服锅炉燃料调节的滞后性使用了燃料前馈。
3.
When the generator primary frequency regulation of system is at low level,severe accident may cause power system collapse if it is not treated properly and timely.
当系统发电机整体一次调频(PFR)水平较低时,如遭遇严重事故而不及时进行控制,将导致频率崩溃、系统瓦解。
5) frequency modulation screening
调频加网
1.
The amplitude modula- tion screening,frequency modulation screening,and hybrid screening technologies were introduced through comparing and analyzing advantage and disadvantage of different screening technologies.
简要介绍了调幅加网、调频加网和混合加网技术,比较分析了不同加网技术的特点,分析了传统柔性版印刷加网工艺的不足,介绍了现代柔性版加网新技术并指出在应用中存在的问题,对柔印加网新技术进行了展望。
2.
The research of digital screening technology on the existing conditions in recent years was summarized including amplitude modulation screening,frequency modulation screening,and hybrid screening.
介绍了数字加网技术的研究现状,阐述了数字调幅和调频加网以及混合加网的原理及算法,并对其特点进行了分析。
6) FM halftoning
调频加网
1.
Densitometers were not able to read the FM screening reliably,therefore we can not use the traditional Murray-Davies model of density on FM halftoning.
调频加网印刷存在密度计无法测出可靠的调频加网光学密度的问题,使传统的有效网点面积率计算公式(Murray-Davies公式)对于调频加网工艺不再适用。
2.
Color conversion model of FM halftoning was established.
主要研究建立调频加网工艺条件下的三色呈色数学模型,也就是建立调频加网工艺的色彩转换模型。
参考词条
补充资料：调频-调频遥测系统
采用调频-调频二重调制方式的频分制遥测系统,简称FM-FM遥测系统，属于模拟式遥测系统。FM-FM遥测系统的抗干扰能力强，遥测精度也比较容易得到保证。模拟式遥测系统大都采用这一类系统。下图为 FM-FM遥测系统的框图。各路被测量经变换器变换成电压信号后去控制各路副载波振荡器。副载波振荡器一般采用压控振荡器（即电压控制的振荡器），其振荡频率正比于控制电压,这样就实现了第一次调频。为了防止路际干扰,各路已调副载波先通过低通滤波器，滤去高次谐波，再送到相加放大器形成多路信号，并通过信道调制器对载波调频，这样就实现了第二次调频。已调频的载波由发射天线发送出去。接收端收到遥测信号后先通过解调器解调出多路信号，再送往各分路的带通滤波器，即分路滤波器，把各路已调副载波分离开来。分离出来的已调副载波送到相应的分路解调器，进行第二次解调，就可以得到所传送的模拟信号。美国对 FM-FM遥测系统已经实现了标准化、模块化、系列化。广泛应用模拟集成电路制成标准部件，提高了系统的可靠性和适应性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。