modulation frequency的例句大全

Research on intermediate frequency electrotherapy apparatus using false random signal amplitude modulation

伪随机信号调幅中频电子治疗仪的研究

Unification of the frequency shift and pulse compression of an ultrashort laser pulse propagating in a background plasma wave is realized by employing the concept of phase modulation of the laser pulse by the plasma wave.

提出等离子体波对光脉冲产生相位调制的观点，把光脉冲在背景等离子体波中传播时的频率移动与脉宽压缩效应统一起来。

Application of Digital Frequency Modulation and Digital Servo in Rubidium Frequency Standard

数字调频及数字伺服在铷频标中的应用

According to the topology structure of main circuit, design the control circuit. It includes design of locking signal circuit, lacking phase detection circuit, locking phase and frequency multiplication circuit, and PWM pulse-width modulation circuit.

根据主电路拓扑结构，设计了其控制电路，包括同步信号电路、缺相检测电路、锁相倍频电路和PWM脉宽调制电路的设计。

Study on Joint Frequency and Phase Modulation Technique in Long Range Underwater Acoustic Communication

水声远程通信的联合频率相位调制技术研究

The Design Scheme and Realization of Frequency Modulation Broadcasting Station Intelligent Controll System on Campus Network

基于校园网的外语调频发射台智能控制系统的设计与实现

PWPF ( Pulse Width Pulse Frequency) modulation technique is applied to the terminal guidance law design problem of space kinetic killing vehicle ( KKV) interceptor.

应用PWPF（Pulse Width Pulse Frequency）调制技术研究空间动能拦截器的末制导律设计问题。

Multi-carrier modulation ( MCM) is a preferable physical layer technology for BWS, since it can efficiently mitigate the frequency-dependent distortion across a wide frequency band and simplify the equalization in a multipath fading environment.

多载波调制（MCM）技术是适合BWS的物理层调制技术，可以很好的解决宽带无线情况下出现的频率选择性衰落现象及简化多径衰落信道环境的均衡问题。

The frequency modulation effects of the probe field in three level Λ-system

三能级∧-系统探测光的频率调制效应研究

On the other hand, the mixed modulation algorithm uses the five-segment modulation algorithm and the characteristic quadrangle to approximate the reference vector which can reduce the switching frequency. Finally, a three-cell seven-level inverters experiment platform is set up.

另一方面，混合调制算法利用特征四边形法和五段算法逼近参考矢量减少了开关切换频率。

Timing Analysis and Research of Direct Digital Frequency Modulation

直接数字调频中的时序分析和研究

According to the present situation of big coal mine elevator velocity modulation system, frequency conversion velocity modulation system has studied based on the DSP control mine pit elevator.

根据现在各大煤矿提升机调速系统的现状，研究了基于DSP控制的矿井提升机变频调速系统。

Usually it was thought the molecular concentration was in direct ratio of the absolute value of discharge current for concentration modulation technique& twice the discharge frequency f.

浓度调制通常被认为是瞬态分子的浓度正比于放电电流幅度的绝对值，即为放电频率f的2倍。

Research on Dynamic and Static Characteristic of Frequency Modulation System for Constant Frequency AC Power Supply

恒频交流电源频率调节系统动静态特性研究

As the control modes of DDS special chips are changeless, users are difficult to get frequency modulation wave what they need.

DDS专用芯片的控制方式固定不变，用户难以获得所需要的调频波；

Vector Control System Based on the Cooperating Control Principles of Frequency Modulation and Voltage Regulation

基于调频调压配合控制原理的矢量控制系统

LFM Fuze launch the same range of frequency modulation continuous wave signal, and use the substract frequency of the emission signal and the return siganl to determine the distance between the shells with the target.

调频无线电引信发射调频等幅连续波信号，其发射信号的频率按调制信号规律变化，利用回波信号与发射信号的频率差确定弹与目标间的距离。

The orthogonal multicarrier modulation, which is the main character of OFDM, determines that it is very sensitive to both timing synchronization error and carrier frequency offset.

OFDM系统自身的正交多载波调制特点，决定了其对定时误差和载波频率偏差十分敏感。

The excellent properties of the TPFT and its function in the output frequency regulation, voltage regulation and PWM modulation control are stated in detail.

详细叙述了三电平PWM变频器在输出调频、调压和PWM调制控制中的作用以及三电平PWM变频器的优异性能。

Modulated pulsed laser is utilized to produce specific frequency light current imaging but not direct current imaging to enhance the SNR. The special modulation circuit is designed in this thesis. 6.

采用经调制的脉冲激光束产生特定频率的光电流成像而非直流成像技术，进一步提高了图像信噪比，并设计了专用的调制电路。