调频

基本解释 (translations)

FM

词组短语

frequency modulation · frequency adjustment

与调频相关的网络例句 [注：此内容来源于网络，仅供参考]

But, in the natural and artificial signal, a lot of signal phases don\'tvary linearly with time, for example, we usually use chirp signal in the radar technology,frequency step signal, linear modulation component of the ground echo in the SARtechnology, linear modulation component of the moving target echo, linear modulationcomponent while the airborn radar detecting the moving target, etc.

在自然界和人工信号中，许多信号的相位变化并不是随时间一次方变化，如雷达技术中常用的线性调频信号，频率步进信号，另外，SAR 技术中，地面回波所含有的线性调频分量，ISAR技术中，运动目标的回波所含有的线性调频分量，机载雷达探测运动目标时的线性调频分量，等等；傅里叶变换对此类信号分析所得的结果是信号在不同频率点上的能量分布，即信号在基函数上的投影。

This experiment is in frequency adjustment X-mitter about that miniwatt frequency adjustment X-mitter operating principle, analyses the debugging making method and their installation, the microphone changes implication into an audible signal, wave an audible signal being modulated as a result of enlarging the day afer tomorrow being in progress to the carrier wave , producing frequency adjustment, by the fact that air wire launching the frequency adjustment electromagnetic wave to the outside , the radio set just can with frequency adjustment meet hear clear implication.

本毕业设计是关于小功率调频发射机工作原理、分析制作方法及其安装调试，在调频发射机中，话筒将话音转化为音频信号，音频信号经放大后对载波进行调制，产生调频波，通过天线向外发射调频电磁波，用调频收音机便可以接听到清楚的话音。

The author proposes some recommendations for bringing the primary frequency control into full play and reducing its effect on stability of coordinate control system at the same time, and also proposes a method introducing DEH primary frequency control factor into coordinate control system.

介绍了一次调频数的设置方法及对协调控制系统稳定性的影响，并且对如何在发挥一次调频作用的同时减少对协调控制系统稳定性的影响提出了建议，提出了将DEH一次调频因子引入协调控制系统的方法。

The author proposes some recommendatio for bringing the primary frequency control into full play and reducing its effect on stability of coordinate control system at the same time, and also proposes a method introducing DEH primary frequency control factor into coordinate control system.

介绍了一次调频参数的设置方法及对协调控制系统稳定性的影响，并且对如何在发挥一次调频作用的同时减少对协调控制系统稳定性的影响提出了建议，提出了将DEH一次调频因子引入协调控制系统的方法。

After compensation of continuous motion of the platform and time difference between upslope and downslope signals for imaging, the moving target can be detected through displaced phase center antenna technology.

提出了一种利用三角波调制调频连续波进行地面高速运动目标检测的新方法，根据三角波调制调频连续波正、负调频导致动目标成像结果在径向反向移动的特点，通过对正、负调频信号分别成像，在补偿了载机平台的连续运动以及正、负调频信号之间的时间差对图像的影响后，将两幅图像通过偏置相位中心天线处理，检测出高速动目标。

The calculation results show that the populations between the two states are Rabi oscillation in the absence of the rf field, square-wave oscillations in the presence of the slow rf field, and stair steps oscillations in the presence of the intermediate rf field.

计算结果表明：当调频场的频率比较低时，从一个态到另一个态的跃迁几率随时间演化为方波振荡；当调频场为中频时，跃迁几率为阶梯型振荡；在高频调频场中出现调频场的多光子共振。

The results showed that:(1) The characteristic frequency of IC neurons of house mouse was increased with increasing recording depth, and the masker intensity used was positive relevant to the IC neurons\' minimum threshold. When the minimum threshold was high, the masker intensity needed was loud, vice versa.(2) According to the masking rate at MT+10dB of IC neurons to frequency modulation and tone burst, the IC neurons were classified as three types: type I neurons ( 72/113, 63.7%), in which the masking effect of TB was better than frequency modulation ;type II neurons (32/113, 28.3%), in which the masking effects of the two maskers were same; type III neurons( 9/113, 8.0%), in which the masking effect of FM was better than TB.(3) Type I neurons, the minimum threshold of which was low, but the Q_(10) and DR values of which were large; in type III neurons, the minimum threshold was high, the Q_(10) and DR values were narrow; in type III neurons, the MT Q_(10) and DR values were in between.(4) Both FM and TB could make the MT of type I neurons shift upward distinctively, but the effect of TB was more significant than FM.(5) The Q_(10) values of type I neurons became narrower under the influence of TB, were unaffected under the influence of FM.

结果显示：(1)小鼠下丘神经元的特征频率随着记录深度的增加而增高，掩蔽声强度与神经元的最小阈值呈正相关，即对高最小阈值的神经元进行掩蔽时需要的掩蔽声强度高，对低最小阈值神经元进行掩蔽需要的掩蔽声强度低：(2)根据调频声(frequency modulation， FM)和短纯音(tone burst， TB)对下丘神经元阈上10dB处反应的掩蔽，将小鼠IC神经元分为三类：Ⅰ类神经元(72/113，63.7％)，短纯音的掩蔽效果比调频声更好；Ⅱ类神经元(32/113，28.3％)，两者对神经元声反应的掩蔽率相同；Ⅲ类神经元(9/113，8.0％)，调频声的掩蔽效果更好；(3)Ⅰ类神经元的最小阈值低、Q_(10)值和动态范围大，Ⅲ类神经元最小阈值高、Q_(10)值和动态范围小，Ⅱ类神经元的最小阈值、Q_(10)值和动态范围介于Ⅰ和Ⅲ类神经元之间；(4)短纯音和调频声都可以使Ⅰ类神经元声反应的最小阈值明显上移，但短纯音使神经元最小阈值的上移更显著：(5)短纯音使Ⅰ类神经元的Q_(10)值变小，调频声使神经元的Q_(10)值增大不显著，短纯音与调频声对神经元Q_(10)的影响差别显著；(6)短纯音与调频声都使神经元的动态范围减小，并且作用显著，但短纯音的效果更显著：(7)短纯音与调频声都使神经元反应的潜伏期延长，效果显著，但TB的延长作用更为显著；(8)随着探测声强度的升高，短纯音和调频声对Ⅰ类神经元声反应的掩蔽率都降低，但在各个探测声强度短纯音的掩蔽率都比调频声高。

Now our main products are: PTX-LCD, TEX-LCD/S, BLUES30NV serial FM exciters, TX serial 1-10KW FM transmitters, TX serial 3-20KW hot plug-in transmitters, AJ1F serial vertical polarization FM antenna, DPA serial panel FM antenna, star-point or bridge style FM multiplexor, digital STL microwave link, professional receivers and any TV related products.

公司主要产品有：PTX-LCD/S，TEX-LCD/S，BLUES系列调频激励器，TX系列1-10KW调频发射机，TX系列3-20KW热插拔数字调频发射机，AJ1F系列各种功率等级的垂直极化调频天线，DPA系列带反射板偶极子调频天线，星型，桥型系列大功率调频多工器，数字STL微波传输系统，专业调频收转机等及所有电视设备产品

When microgrid is operated in islanded mode, VSGs can be divided into non-frequency regulation units and frequency regulation units, the former can generate power and participates in primary frequency control according to dispatching to mitigate system frequency deviation due to disturbances; the latter can offer referential voltage of microgrid and use secondary frequency regulation to implement no-error frequency control.

微电网孤岛运行时，将虚拟同步发电机分为非调频发电单元和调频发电单元，前者既能按照功率调度指令发电，又能参与一次调频，缓解扰动情况下系统频率的波动，后者提供微电网参考电压，并利用二次调频实现频率的无差控制。

To solve the exsisting problems in the realization of the LFM/CW radar, the thesis presents a technique for dynamically measuring the LFM/CW signals, which can accomplish the dynamic measurements of FM linearity, FM bandwidth and FM slop of the transmitted signals of LFM/CW radars. This technique creates an effective and accurate means of judging the performance of LFMCW radars. The linearity-correction techniques presented in the thesis successfully make the linearity of the transmitted signals of an actual LFM/CW radar reduce from approximately 25% to 0. 1%(or r. m. s linearity of 0.04%), better than the best results (0.22%) obtained by foreign researchers with complex linearization closed-loop in the same kind of LFM/CW radars, according to the published literatures during the last decade. In order to improve the capability of the real-time processing and range-cells management of LFM/CW radars, the principle of equivalent mixing by lacking-sampling process of band-pass real signals is proposed based on the well-proved improvedversion of sampling theorem of band-pass real signals. This principle is used to configure the range-segments processing of the beat signals of an actual LFM/CW radar. The techniques of system-background interference suppression and the beat signal's dynamic range suppression are proposed, and are realized in an actual LFM/CW radar to demonstrate their effectiveness.

针对线性调频连续波雷达实现中急待解决的技术问题，文中提出并验证了线性调频连续波信号的综合动态测试技术，可以完成对线性调频连续波雷达发射信号的扫频线性度、扫频带宽和扫频斜率的综合动态测试，为衡量实际线性调频连续波雷达的系统性能创立了精确有效的测试手段；文中建立的非实时闭环动态校正技术使一部实际的线性调频连续波雷达的发射信号（时带积3×10〓）的扫频线性度从25%改善为0.1%（方均根线性度0.04%），优于国外已公布的80年代同类雷达中采用复杂的实时闭环动态校正环路所获得的实际结果（0.22%）；为了改善线性调频连续波雷达的实时性和分辨单元数处理能力，文中发展完善了实带通信号的采样定理并给予了严格证明，并在此基础上提出了欠采样等效混频原理，将其应用于实际线性调频连续波雷达的距离分段处理中；针对线性调频连续波雷达中系统背景干扰和回波动态范围问题，创立了系统背景综合抑制技术和频域动态范围压缩技术，并将它应用于实孔线性调频连续波雷达系统中，显示出它们的有效性。

与调频相关的网络解释 [注：此内容来源于网络，仅供参考]

FM LEVEL：调频伴音电平

FM GAIN 调频伴音增益 | FM LEVEL 调频伴音电平 | FMA 调频伴音衰减电平

FM GAIN：调频伴音增益

FM 调频模拟伴音 | FM GAIN 调频伴音增益 | FM LEVEL 调频伴音电平

FM 105: Video Killed the Radio Star：调频 第一季05

FM 104: Golden Lady 调频 第一季04 2009 | FM 105: Video Killed the Radio Star 调频 第一季05 2009 | FM 106: Blinded by the Light 调频 第一季06 2009

tamed frequency modulation：平滑调频,缓慢调频,软调频

平衡音频 Balanced Audio | 平滑调频,缓慢调频,软调频 Tamed Frequency Modulation | 平滑扩容 smooth expansion

Tamed Frequency Modulation TFM：平滑调频,缓慢调频,软调频

平衡码 Balanced Code | 平滑调频,缓慢调频,软调频 Tamed Frequency Modulation TFM | 平滑扩容 Smooth Expansion

Tamed Frequency Modulation TFM：平滑调频

平衡码 Balanced Code | 平滑调频 tamed frequency modulation TFM | 平滑调频,缓慢调频,软调频 Tamed Frequency Modulation TFM

frequency modulation threshold：调频门限

frequency modulation system 调频系统,调频制 | frequency modulation threshold 调频门限 | frequency modulation type altimeter 调频式测高计

frequency-modulated transmitter：调频发射机

frequency modulated receiver 调频接收机 | frequency modulated transmitter 调频发射机 | frequency modulation feedback 调频反馈

frequency-modulated generator：调频发生器

frequency-modulated feedback demodulator 调频反馈解调器 | frequency-modulated generator 调频发生器 | frequency-modulated signal generator 调频信号发生器

frequency-modulated generator：调频振荡器

frequency-modulated fuze 调频引信 | frequency-modulated generator 调频振荡器 | frequency-modulated oscillator 调频振荡器