根据特高频信号传输衰减原理进行衰减-吸潮性试验。
Attenuation-moisture test was carded out based on the principle of UHF signal transmission attenuation.
介绍了空气耦合非接触式超声检测技术基本原理，推导了该技术中信号传输衰减理论构成因式。
With the brief description of the basic principle of air-coupled non-contact ultrasonic testing, the factors affecting the whole signal path losses of air-coupled ultrasonic testing are deduced.
针对双总线形、星形、环形和双环形四种光纤网络拓扑，比较它们的光纤需求长度、平均传播延迟、传输衰减、最大比特率及容错。
The comparison is in term of fiber required, average propagation delay, transmission loss, max bit rate, fault tolerance among four type topologies included bus, star, ring and dual ring.
可能就需要一个放大器或衰减器，以确保通过开关传输所需的功率。
An amplifier or attenuator may be needed to ensure that the required level of power is transmitted through the switch.
在电力载波技术的应用中，信号干扰和衰减是影响信号传输的重要原因。
In powerline carrier wave application, signal disturbing and signal attenuation is the important reason of effecting signal transmission.
本论文还深入分析了大气衰减效应和大气湍流效应对激光传输的影响，然后给出了一种基于大气信道效应的大气信道模型。
The influence of atmospheric attenuation and turbulence to laser transmission is profoundly analyzed in the paper. Then , A model, based the atmospheric attenuation and turbulence effects, is present.
利用多镜理论以两种不同方法推导了在多腔级联法布里珀罗滤波器件中引入衰减时信号透过率的传输矩阵算法。
A matrix treatment is presented by two different methods based on multi-mirror theory to calculate the transmission characteristics of the multi-cavities Fabry-Prot filters with attenuation.
上述一系列效应对激光信号的传输产生巨大的影响、其中最为重要的影响效应有衰减、光束闪烁及抖动效应。
These all will produce some other effects that would strongly affect the transmission of laser signals, especially attenuation, coruscation and dithering of beam.
此外，推导出波导tm、TE模的传输功率、损耗功率、衰减常数、等效阻抗等特征参数的边界元公式。
Furthermore, the formulae of transmitted power, loss power, attenuation constant and equivalent impedance for TM and te modes are deduced.
使光路在传导的过程 中损失最小，避免传统裁床由于光路传输问题而造成激光切割功率的大量衰减。
The light path in the conduction process loss, avoid the traditional cutting bed due to optical transmission problems caused by large attenuation of laser cutting power.
该光纤衰减器性能稳定，精度高，适于光纤传输系统使用。
This fibre attenuator is useful to optical fibre transmission system, because of performance stability and high precision.
居有较高的传输频率和较低的衰减。
It has a rather high transmission frequency and low attenuation.
由于卫星通信信道长，传输距离远，电波要穿过对流层和电离层，易使信号衰减，引入噪声，造成误码。
Due to satellite communication's long channel, far distance transmission and its wave through troposphere and ionosphere often brings the signal deamplification, noise and wrong code.
它具有与激励模相同的传输常数，但幅度却以芯径渐缩的速率衰减。
It has the same transmission constant as the exciting mode, but its amplitude reduces at the decreasing ratio of core radium.
实验结果表明，该系统有效改善了VGA信号的衰减和失真现象，可保证信号的高质量、长距离传输。
The results show that the system improved the VGA signal attenuation and distortion, achieved high-quality, long-distance transmission.
本文对激光在大气中传输的各种能量衰减机制进行分析和讨论，为激光雷达系统的设计提供理论依据。
In this paper, the attenuation mechanisms of ladar signals propagating in the atmosphere are discussed and analyzed, and these give a theoretical basis of design of ladar system.
利用MATLAB及用fir滤波器做信道的传输函数模型对信道噪声和复衰减特性分别进行了建模。
The power line channel noise is simulated by MATLAB and the attenuation is simulated through the channel transmission module of FIR filter.
经验衰减模型与物质传输模型的对比分析表明，物质传输模型比衰减模型更有利于解释环境箱试验结果。
Mathematic model simulation indicated that mass based transfer model is more appropriate than experiential decay model to explain the results of chamber test.
由于户外图像的退化与大气状况密不可分，分析了光在传输的过程中发生散射和衰减的物理过程。
As the outdoor atmospheric conditions and the degradation of the image are inseparable, analysis of light transmission occurs during the physical process of scattering and attenuation.
因而在实际传输的条件下，光纤振动引起的附加衰减完全可以忽略。
Through numerical calculation and experiments, conelution is made that these additional attenuations are quite small, which can therefore be neglected, in the first approximation.
分析了大气对光信号的衰减以及大气湍流造成的光斑抖动对通信的影响，记录了系统的信号传输波形和通信眼图。
The atmosphere attenuation to 650 nm light and the dot whipping caused by air turbulence were analyzed. The signal transmission waveform and communication eye diagram of the system were recorded.
由于降雨对Ka波段卫星通信系统的电波传播的衰减较大，成为影响其传输质量的重要因素之一。
Rainfall has become one of the key factors which influence the transmission quality, because it has great attenuation to the electronic wave transmission of Ka band satellite communication system.
这种测量方法的工作原理是基于衰减全反射中的瞬逝波的传输特性以及物质的反常色散特性。
The theory was based in the transmission characteristics of evanescent wave in attenuated total reflection and the abnormal dispersion characteristics of material.
仿真研究了传输信道和光功率对光码分多址系统性能的影响，分析了传输距离、光纤色散系数、光纤衰减、入纤光功率等与误码率和Q值的关系。
The influences of length, dispersion index and attenuation index of transmission fiber and incident optical power on ber (bit error rate) and Q value of the system is analyzed.
基于对红光激光束大气传输特性的分析，讨论了激光束传输过程中背景光干扰、大气衰减和湍流效应的影响。
Based on analysis on transmission property of red laser beam, impact from background light, attenuation and scintillation are discussed.
高度不匹配之电源与负载抗，传输线上多重反射之衰减时间很长。
High source and load reflections require a long time for multiple reflections to decay.
激光雷达信号在大气中传输时，大气中的气体分子和大气气溶胶粒子、尘埃、雾、雨等对激光信号的吸收和散射导致光信号能量的衰减是影响激光雷达信号传输的重要因素。
When radar signals propagate in the atmosphere, the absorption and scattering of air molecule, aerosol particles, dust and cloud, fog and rain result in energy attenuation of ladar signals.
实验表明额隆内有若干点声衰减为负值及零值、意味着声波沿这些点传输时、声压非但不减小反而增大了。
The experiment showed that in the melon slices there were some points where the sound pressure attenuation coefficient were negative value or zero.
实验表明额隆内有若干点声衰减为负值及零值、意味着声波沿这些点传输时、声压非但不减小反而增大了。
The experiment showed that in the melon slices there were some points where the sound pressure attenuation coefficient were negative value or zero.
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