On the basis of these, research and design the RFID reader antenna which used in the electronic toll collection system ( ETC). Then, This paper introduces a ultrahigh frequency circularly polarized ( CP) rectangular microstrip antenna on air substrate.

1、

Along with a very fast speed development of global economy, especially the advancement and popularization of Internet of Things, the requirement of ultrahigh frequency ( UHF) RFID system is becoming increasingly pressing.

随着经济的飞速发展，尤其是物流网的提出和推广，人们对超高频（UHF）段远距离非接触电子标签系统的需求越来越迫切。

互联网摘选

2、

Pure tone hearing thresholds of conventional ( 125 Hz to 8 kHz) and ultrahigh frequency ( 8 kHz to 20 kHz) were examined.

测定常规频率（125Hz～8kHz）及超高频率（9～20kHz）的纯音听阈。

互联网摘选

3、

In this dissertation, a high sensitivity, high spatial resolution micron moire method and its correlative techniques of ultrahigh frequency grating fabrication and digital image processing are presented.

本文提出并实现了在测量灵敏度、空间分辨率等方面均满足细微观力学实验测量要求的微米云纹方法以及相关的超高频精确制栅与条纹图像的数字化分析处理技术。

互联网摘选

4、

The influences of initial stress on the vibration and transverse wave propagation in carbon nanotubes under ultrahigh frequency ( above 1THz) were investigated.

本文研究初始应力对碳纳米管在极高频率（大于1THz）下横波传播的影响。

互联网摘选

5、

This paper presents that developing ultrahigh frequency pulse EDM generator of adjustable duty ratio by CPLD based on the characteristic of CPLD, complete hardware logistic.

从CPLD具有完全硬件逻辑的特点出发，提出了用CPLD发生占空比可调的超高频电火花加工脉冲信号的设想。

互联网摘选

6、

All the average methods for measuring ultrahigh frequency are based on the processing of frequency, the method for which is frequency mixing or harmonic mixing.

所有针对特高频率测量最基本的方法都是建立在对频率信号处理的基础上，而最常用的处理方法是混频或谐波混频的方法。

互联网摘选

7、

This method is not effective for ultrahigh frequency measurement, because it is difficult to multiply or divide a ultrahigh frequency.

在利用该方法测量特高频率时是非常困难的，因为对高频进行倍频或分频是十分困难的，从而也就造成了特高频测量的主要困难。

互联网摘选

8、

A Study on Ultrahigh Frequency Polysilicon Emitter Bipolar Transistors

超高频多晶硅发射极晶体管的研究

互联网摘选

9、

Frequency-doubled experiment of ultrahigh frequency CW actively mode-locked Nd: YAG laser

超高频CW主动锁模Nd：YAG激光器的二倍频实验研究

互联网摘选

10、

Propagation of the ultrahigh frequency ( UHF) radio wave in the underground tunnel

地下巷道中UHF特高频无线电波的传播

互联网摘选

11、

Radiation of ultrahigh frequency microwave with ultrashort optical pulses

用超短光脉冲产生超高频辐射

互联网摘选

12、

Design of Digital and Intelligent Ultrahigh Frequency Millivolt Meter

数字式智能超高频毫伏表的设计

互联网摘选

13、

New method of fabricating ultrahigh frequency grating

一种制作超高频全息光栅的新方法

互联网摘选

14、

Developing Ultrahigh Frequency Pulse EDM Generator of Adjustable Duty Ratio

占空比可调的超高频电火花加工脉冲电源的研制

互联网摘选

15、

Research on Technology for Measuring Ultrahigh Frequency

关于超高频率测量技术的研究

互联网摘选

16、

Present situation and Prospect of ultrahigh frequency method based research of on-line monitoring of partial discharge in gas insulated switchgear

基于超高频法的GIS局部放电在线监测研究现状及展望

互联网摘选

17、

A method for measuring the phase characteristics of ultrahigh frequency modulating light by optical phase shift is proposed.

提出采用光学移相办法测量超高频调制光相位特性的一种方法。

互联网摘选

18、

On the use of endovascular device Factors Affecting the Dynamic Properties of a Torque Converter the Lock-Up Clutch During the Process of Locking up and Unfastening

对介入导管使用的管理影响闭锁式变矩器闭解锁动态性能的因素及对策

互联网摘选

19、

Buttons involves the most handling during the wearing experience especially when fastening and unfastening.

纽扣处理方式很麻烦，特别是衣服有扣还是没扣。

互联网摘选

20、

Unfastening her dress, and still blushing, she began feeding her child.

她仍然有些脸红，解开衣服开始给孩子喂奶。

互联网摘选