transmission frequency的例句大全

It has a rather high transmission frequency and low attenuation.

居有较高的传输频率和较低的衰减.

Based on the fact that electric power is output from the HF terminal of the frequency converter, this paper analyzes the causes and harms of higher harmonics, as well as the reasons for the power cable oscillation radiation during transmission and their solutions.

根据变频系统高频输出电能特点，分析高次谐波产生原因和危害，并给出在电力电缆传输过程中产生振荡辐射的原因和解决方法。

The first measures was taken by AC frequency speed regulation patterns, with the rapid development of electrical transmission technology, AC speed regulation system for the fast development.

最先采取的措施就是采用交流变频方式调速，随着电气传动技术的快速发展，交流调速系统技术获得了快速发展。

In addition, the paper gives the effects of mobile terminal speed 、 data transmission rate 、 ground evironment and carrier frequency on the channel transmission efficiency.

对移动终端的速度、数据传输速率、地面环境及载波频率对信道传输效率的影响作了探讨。

Research on test methods in frequency domain on the basis of transmission line

长线频域测试法研究

This paper treats of frequency stability of conventional 12-channel carrier transmitters as used in collieries, with particular reference to the considerable variations of underground transmission line impedance and fluctuations of supply voltage.

本文根据煤矿井下载波传输线路阻抗变化大、电源电压波动大的特点，针对传统的矿用十二路载波发射机，讨论了其振荡频率（即发射频率）的稳定性问题。

The research results show that the threshold values of power frequency electric field, power frequency magnetic field and audible noises with harmful influence on biology are higher than the relevant limited values of power transmission line;

研究结果表明：工频电场、工频磁场和可听噪声对生物有确定有害影响的阈值远高于输电线路有关量的限值；

Through signal analysis in time and frequency domains, the vibration transmission path from brake to steering wheel is clarified. In the end a vibration control method by means of adjusting the rigidity of rubber bushing is put forward.

通过信号时域和频域分析，明确了振动从制动器到转向盘的传递途径，提出了调节橡胶弹性元件刚度的振动控制方法。

The theme mainly focused on the problem how to apply Orthogonal Frequency Division Multiplexing modulation technology to the low-frequency elastic wave through-the-earth communication system which takes the layered earth for transmission medium.

本课题研究的是把正交频分复用调制技术应用在以分层大地为传输媒介的低频弹性波透地通信系统中。

A space-time-frequency ( STF) coded orthogonal frequency division multiplexing ( OFDM) transmitter diversity scheme for fast fading frequency selective channels is proposed. The proposed STF-OFDM transmission scheme owns time diversity gain.

提出了一种基于空间时间频率（STF）编码的正交频分多路复用（OFDM）发射分集方案，这种传输方案可用于频率选择性快衰落信道。

In this paper, the wireless data radio takes the GPS differential positioning as a starting point, takes the FSK modulation mode, can complete the wireless transmission of data in S frequency band with the time division duplex operation mode.

本文设计的无线数传电台以用于GPS差分定位为出发点，采用FSK的调制方式，能在S频段以时分双工的工作模式完成数据的无线传输。

The time harmonic voltage and current wave propagation along a transmission line can readily be transferred from frequency domain voltage and current phasor distribution along the line.

由传输线上电压及电流沿线分布之频域相量，可转换为传输线上各频率成份弦波电压及电流沿线之时域传播。

And the other is how to cope with more severe channels fading, such as frequency selective fading and time selective fading to improve the transmission quality of signals in the high speed communication, which is also very difficult task.

其二，在高速通信的环境中，信道的衰落干扰问题更加严重，如频率选择性衰落和时间选择性衰落。怎样克服衰落的影响，提高信号的传输质量，同样是一个难题。

However, poor conditions of transmission, serious noise background, time and frequency selective fading, the limited bandwidth of channel result in serious distortion of UWA communication signals.

但由于水声通信传输条件恶劣，存在严重的噪声背景，并且水下声信道的带宽十分有限，再加上复杂的多径传播和时间、频率选择性衰落，导致水声通信信号严重畸变。

However, the received performance of HF/ VHF communications is directly affected by Doppler frequency shift, which caused by transmission characteristics including terminal movement, fading, multi-path effects and other factors, thereby needs to be estimated accurately and compensated real-timely.

但是系统中终端的移动、衰落和多径效应引起的多普勒效应会严重的影响到接收性能。因此，准确实时的多普勒频移估计与补偿技术对于短波/超短波通信来说尤为重要。

Abstract: the frequency change and speed adjusting has become the backbone of modern electrical transmission and it is the necessary technics of modern chemical fibre industry.

摘要：变频调速技术已成现代电气传动的中枢，也是现代化纤行业必备的工艺技术。

The galloping of an electrical transmission line is characterized by large amplitude, low frequency, self-excited oscillation, which is occurred under action of continuous wind forces.

输电导线覆冰后在持续的风作用下会产生一种低频、大幅度自激振动，称为舞动。

Transmission Characteristics of Stripline in THz Frequency Band

THz频段带状线的传输特性

The results indicate that, under the thermal noise approximation, the measurement accuracy of Brillouin frequency shift is dependent on thermal noise, the derivative of the transmission function of the edge optical filter and the power of Brillouin scattering optical signal.

结果表明，在热噪声近似下，布里渊频移测量精度与热噪声、边缘光滤波器透射函数的导数及布里渊散射光信号功率有关。

Acquisition and Transmission of Standard Time, Frequency in Power System

电力系统中标准时间、频率的采集和传输