查询词典 microwave

It was shown that the SNR of the RADS could be improved by using a microwave cavity with proper microwave field mode and high microwave filling factor, a rubidium spectrum lamp with high spectrum purity and a separated isotope filtering scheme in the physics package design. The performance of the rubidium atomic frequency standard could be improved by taking all these factors into consideration.

本文分析了微波腔的结构、铷光谱灯的光谱纯度和同位素滤光方案对信噪比的影响，指出采用模式优越、微波填充因子大的微波腔，光谱纯度高的铷光谱灯，用分离滤光方法进行同位素滤光，可以提高铷原子鉴频信号的信噪比，从而使铷频标的稳定度指标得到进一步改善。

This system ofcompatible electromagnetism of frequency spectrum has someimportant functions listed as follows:(1) Analysis disturbance of the same or adjacent frequencies (2) Analysis of performance of radio link (3) Analysis of intermodulation (4) Automatic selection of frequency(auxiliary assignment of frequency)(5) Prediction of region of radio field intensity (6) Harmonization of frequency border (7) Analysis and design the system of microwave and satellite earth station.(8) Generate photographs This paper realizes the function of harmonization analysis ofthe system of microwave and satellite earth station. The concretework includes:(1) Based on the propagation model of radio wave,computing the absorption loss of atmosphere of microwavecommunication system and its fading, simulating the receivingvoltage and realizing the computation of disturbance andharmonization between microwave station and earth station.

频谱电磁兼容分析系统主要实现以下几个功能：⑴同、邻频干扰分析⑵无线链路性能分析⑶互调分析⑷频率自动选择⑸场强覆盖预测⑹边界协调⑺微波与卫星地球站系统设计和干扰协调分析⑻图形制作功能本文做为全省建设的电磁兼容分析系统的一部分，实现了微波站与地球站干扰协调分析这一功能，具体有：⑴以无线电波自由空间传播为模型，对微波通信系统的大气吸收损耗和衰落储备量进行了计算、对接收电平进行了模拟仿真，实现了微波- I -吉林大学硕士学位论文 Abstract站与地球站之间的干扰与协调计算。

Acording to the results for the analysis of component and structure of titanic iron ore with X-ray diffractometer and the fact in that titanic iron ore is prossessed of a dielectric property capable to absorb evidently microwave, a household microwave oven with power of 800W is applied to the decomposition of titanic iron ore sample under atmospheric pressure. It is shows that the sample with size of below 0.125nm can completely decomposed with phosphoric acid or mixture of phosphoric acid and sulfuric at about 160℃(corresponding to mid-low fire gear in microwave oven).

本实验根据X-射线衍射仪分析钛铁矿组成和结构的结果，利用钛铁矿显著吸收微波的介电特性，使用改装后的800W家用微波炉，在常压下选择中低火加热温度（160℃左右），分别用磷酸和磷硫混酸在微波辐照下消解粒度小于0.125mm的矿样，可快速将矿样消解完全。

Consequently the beam transmission problem is solved well. The general design curves of microwave plasma drift tube are developed by the theory and they can be used for development of the plasma microwave devices. Ion channel, as a important phenomenon in the interaction between electron beam and plasma, is first introduced into the study of PASOTRON, to replace the concept'plasma channel'used in general plasma microwave devices. A model is created to describe the channel performance. The channel is not stable, it is oscillatory and the oscillation frequency is larger than that of plasma.

作为电子束与等离子体相互作用的一个重要现象，本文首次将离子通道的概念引入到了PASOTRON的研究中，以区别常规的等离子体通道概念，并通过建立的模型推出离子通道并非一稳定规则的通道，而是具有振荡特性，振荡频率高于等离子体频率，推出了当满足一定条件时束外可能没有电子而成为纯的离子通道，这种状态对微波器件有重要的价值。

A new type of X-band high power microwave source - the Resonator Cerenkov Oscillator-Tapered Amplifier Tube is put forward for the first time in the present paper. The proposed high power microwave device is based on a comprehensive investigation of related research work in the world and is in agreement with the demands to the development of practical high power microwave sources.

在较全面调研和认真分析高功率慢波器件发展趋势的基础上，结合返波振荡器等切仑科夫器件和渐变锥形结构微波器件的特点，提出了一种新型X波段高功率微波发生器—低磁场谐振腔切仑科夫振荡器—锥形放大管。

Big power load mainly is used for absorbing the power of radio frequency and microwave system .lt can also used as a dummy load of antenna and terminator of microwave transmitter.

大功率同轴负载主要用于吸收射频或微波系统的功率，可作为天线的假假负载，发射机的终端。

ABSTRACT In this dissertation a number of theoretical and technical problems to be faced in applying synthetic aperture techniques to remote sensing of the earth are resolved, researching on synthetic aperture microwave radiometric imaging technology against the background of developing satellite microwave radiometric imaging system.

全文主要以星载微波辐射成像系统的研制为背景，对合成孔径微辐射成像技术进行了研究和探索，解决了将合成孔径技术移植到地球遥感领域存在的一些具。。。

Return loss is one of the important indices, which is used to evaluate the absorbing characteristic of the microwave anechoic chamber, so the test of it comes into one of the important aspects of examining the characteristic of th e microwave anechoic chamber.

微波暗室的回波损耗是衡量微波暗室吸收特性的一个重要指标，因此对微波暗室的回波损耗的检测是检验微波暗室性能优劣的一个重要方面。

Variation laws of electron movement with emergence angle and microwave electromagnetic parameters are also derived. The emergence angle of electron has significant effect on the movement of electron, and there is an emergence angle in which the electron has the maximum trajectory length and impact energy, Impact energy will increase and return time will reduce as increasing the amplitude of electric field, and both parameter would oscillate with the phase of electric field, which can essentially explain that multipactoring electron number oscillates in twice the frequency with the increase of microwave frequency, electron trajectory will change from parabolic-like movement to complex oscillation.

研究发现：电子出射角度对其运动状态有显著影响，电子存在运动轨迹最大的某一出射角度，该角度下电子拥有最大的撞击能量；微波电场幅值的增加将使电子撞击能量增加，返回时间减小，微波电场相位的变化使电子的撞击能量和返回时间呈周期振荡，这从本质上解释了电子数量在二次电子倍增过程中以微波频率两倍周期振荡的原因；随着微波频率的增加电子将由简单的类抛物线运动转变为复杂的振荡运动。

Methods: A novel microwave antenna with water-cooled shaft was used in fresh liver of pig in vitro. Microwave energy was applied in one session at 60~90W for 5~25min, and the diameter and appearances of coagulation were observed.

采用一种新型的水冷式低杆温微波电极对离体新鲜猪肝行微波消融，单次能量输出60~90W，5~25min，观察不同消融条件造成的组织凝固范围和形态。

Warden: That's a beautiful dog, but don't bring her again.

那是条漂亮的狗，但是不要再把她带来了。

You get up in the morning – no hangover!

你第二天早上起来的时候—不会宿醉！