For this purpose,an oversized imperfect periodically loaded rectangular waveguide is proposed,and surface impedance approximation is adopted to formulate the problem.
本文首先给出了隧道中有列车通过时的简化模型——超大尺寸周期加载的不完全矩形波导模型，导出了这种结构中列车的表面阻抗。
This paper analyzed the propagation charactersitics of radio waves in imperfect surface chasm along railway with the concepts of waveguide theory and surface impedance.
利用波导分析理论及介质表面阻抗的概念，分析了电波在非理想表面的山岬中的传播特性。
When the electric dimension of the cylinder is large and the thickness of the dielectric layer is small, a simple form of surface impedance of the cylinder is obtained.
用本征函数法推导了在平面波照射下有耗介质覆盖金属圆柱体的散射场表式，以及在小介质厚度、大电尺寸条件下表面阻抗近似表达式。
Using the periodical surface′s character of band gap and impedance transition of electromagnetic crystal structure such as photonic band gap(PBG),frequency selection surface(FSS),high impedance surface(HIS) and so on,the varactor diode was put onto the approximate HIS′s surface to join each cell of metal on top layer to realize the electronic control for periodical structure.
利用如光带隙电磁结晶结构、高阻抗结构等周期性结构的带隙特性和阻抗特性,通过在类似高阻抗表面的周期性金属单元表面铺设有源器件———变容二极管,控制周期性结构的性能,建立有源周期性结构,影响入射电磁波的传播特性,实现对反射波束的指向的有源控制和有效改变。
When the metal plate of high impedance surface has the same shape and almost equal dimension with the patch antenna,the gain of patch antenna or antenna array can increase largely due to the resonant effect.
研究了高阻抗表面对矩形贴片天线及贴片天线阵列性能的影响。
Theoretical modeling and analysis of high impedance surface and their application.
本文主要研究了以下三方面的内容:1高阻抗表面的建模与理论性分析以及验证与应用本文将高阻抗表面结构进行化简,从而建立起等效模型,并通过传输线方法解释了高阻抗表面的谐振现象。
In Reference [l],the surface impedance method based on two scalarmagnetic potentials is presented by the authors.
在已发表的论文“双标量磁位的表面阻抗法”的基础上，对三维多连域涡流问题，进一步证明当采用全标量磁位处理阻抗边界条件时，全标量磁位和简化标量磁位具有唯一解。
Multi-metal Microcontamination of Silicon Wafer Surface Characterized by Electrochemical Impedance Spectroscopy
硅片表面多金属污染的交流阻抗表征
Research on High Impedance Surface EBG Structures Applying to Antennas;
高阻抗表面EBG结构天线应用的研究
Design of Patch Antennas Based on PBG Structure with High Impedance Type Surface
高阻抗表面型PBG结构贴片天线的设计
opposition to the flow of sound through a surface; acoustic resistance is the real component of acoustic impedance and acoustic reactance is the imaginary component.
声音在通过一个表面时受到的阻力；声阻是声阻抗的实部，声抗是声阻抗的虚部。
intrinsic impedance
内在阻抗;内阻抗;内禀阻抗;本征阻抗;固有阻抗
impedance transducer
阻抗传感器，阻抗换能器
impedance compensator
阻抗校正器阻抗补偿器
acoustic impedance density
声阻抗密度，声阻抗率
impedance cardiogram (abbr.ICG)
心阻抗图血流，心阻抗图，阻抗心动图
These figures show that the improvement of input impedance is within a factor of ten.
这些数字表明,输入阻抗的改进值为一个数量级.
The modeling result demonstrates that the azimuthal interface is also wave impedance interface.
模拟结果表明方位界面也是波阻抗界面。
The AC complex impedance method is widely used to charactrize electronic materials.
AC复阻抗方法已广泛地用于表征电子材料。
A power carrier wave meter reading technology based on impedance adaptation filtration
基于阻抗适配滤波的电力载波抄表技术
Characterization of Photo-electrocatalyst Properties of TiO_2 by AC Impedance Method;
交流阻抗法TiO_2半导体光电催化特性表征
Characterization of Au ring-microelectrode with cyclic voltammetry and AC impedance spectroscopy
用循环伏安法和交流阻抗法表征Au环微电极
Self-assembled monolayers (SAMs) of Schiff bases were prepared on copper surface and characterized by electrochemical impedance spectroscopy (EIS).
用电化学阻抗法表征了铜表面上席夫碱自组装膜及其硫醇改进膜。
impedance audiometer
阻抗听力计，阻坑测听仪
Zero reactance;Infinite reactance;Zero reactance - Infinite susceptance;Infinite reactance - Zero susceptance
零阻抗;无穷大阻抗;零阻抗-无穷大电纳;无穷大阻抗-零电纳