The Transportation of TEM Wave in CATV System

TEM 波在CATV系统中的传播

Tunnel and mine well tunnel can be regarded as waveguide there exists a cut-off frequency of electromagnetic wave in the tunnel .

隧道和煤矿井下巷道都可看作是波导，在空隧道中电磁 波存在着 截止频率， 列车的存在 改变了隧道的截面形状和尺寸， 改变了 TEm。

Similar to the elastic wave field TEM electromagnetic wave field has both reflection and transmission too .

TEM电磁 波场 源同样存在二次波和透射 波，从 电磁 波和弹性波在介质中传播的相似性角度认识，存在二次场 拟地震 解释的条件。

According to the similarity between the propagation of magnetic dipole source TEM field and reflected-seismic wave it is proposed to explain TEM data with the pseudo-seismic interpretation .

根据磁偶源 瞬变电磁场与反射地震 波的传播规律的相似性，提出了TEM资料拟地震快速成像解释的思路。

Transmission electron microscope ( TEM ) electron microprobe with wave spectrum ( EMWS ) and high resolution TEM with energy spectrum ( HRTEM ) were used to observe the change of BMSCs ultrastructure and the distribution of lanthanum ions in the cells .

用透射电镜（ TEM）、电子探针 波谱（EM-WS）及高分辨透射电镜能谱（HRTEM）观察BMSCs超微结构与金属成分。

TEM wave propa - gating in this structure is investigated in detail .

本文在考虑了多导体厚度情况下详细研究了该系统中的最低 波型，即 TEM 波。

The absorbing boundary condition for TEM wave is tested numerically and it is applied to programming .

比较了开放腔和封闭腔谐振 频率，验证了 TEM 波吸收边界条件，并在实际编程计算中得以应用。

The Principle and Designed Method of Setting up TEM Field in Rectangular Wave Guide

在矩形 波导管内建立 TEM场区的工作条件

The TEM wave transmission lines with helical inner conductor and their slow wave velocity are solved by means of the equivalent transformation . Parameters of several helical transmission lines are given .

本文提出用等效变换法求解内导体为螺旋线的 TEM 波传输线及其慢波速度，并给出了几种螺旋传输线的电参量。

Stable Operation of TEM_ ( 00 ) Mode Laser and the Function of 1 / 4 λ Wave Plate

TEM（00）模激光器的稳定运转以及1/4λ 波片的作用

When electromagnetic wave has been fed into the cell a uniform TEM field is established with a frequency lower than the cutoff frequency of TE_ ( 10 ) mode of rectangular wave guide .

当电磁波输入传输室后，一个小于矩形 波导TE（10）模截止频率的 行波 电磁场被建立起来。

TEM transmission cell is a new equipment for simulating transmission conditions of EM wave in free space .

横 电磁 波传输 室 （ TEMCELL）是用于模拟电磁 波在自由空间传输状态的一种新的 实验设备。

Investigated was the hydrolysis process of titanyl sulfate without adding external seed in ultrasonic wave field . The product of hydrolysis was characterized by XRD SEM TEM and EDS.

研究了硫酸氧钛溶液在 超声波场中自生晶种的水解过程，并结合XRD，SEM，EDS和 TEM等现代测试技术对水解产物进行了表征。

The effect of the spatial inhomogeneity of TEM mode on the electron beam-TEM wave field interaction has been discussed with the dynamic thcory .

电磁波与电子注的互作用不仅与电子注的特性有关，也与 波场的极化、空间特性紧密相关。

TEM field is slowly changing in middle to deep depth prospecting which is characterized by unperceivable wave and dominant dissemination thus it can be assumed to be quasi-static state approximate and the wave equation of electromagnetic wave radiation is retrogressive and replaced by diffusion equation .

在中、深层勘探情况下， TEM场是缓变的，其 波动性已经很不明显，扩散特征起支配作用，波动方程退化成了扩散方程。