射频

Then the blood supply of the ACL of the dog was observed. Another 24 dogs were divided randomly by sortition into two groups, one receiving RF reefing on midportion and the other on amph-portions (amph-portions group).

将墨汁灌注液由远端注入，直至下肢皮肤变成黑色，观察家犬前交叉韧带的血液供应。24只犬采用抽签法随机分为射频紧缩中间部组、射频紧缩两端组。

Results In 3 patients, electrophysiologic study was showed that the type of AT was automatic mechanism (2 patients) and reentrant mechanism (1 patients).

AT的射频消融成功率较高，但儿童生理解剖结构的特殊性使其射频消融具有较成人不同的特点，特别是其麻醉方法的选择有待进一步探讨。

The results of the paper have great significance to modernize the self-defensive weapon, enhance the design quality of automatic weapon as well.

解决了微口径武器自然射频过高的关键技术难题，实现了微口径单兵自卫武器的射频可调和单发点射可控。

In Broad Band ,Curcuit signal graphics is achieved by oscillograph ,and packet loss rate , throughput, Latency , back-to-back and so on.;In VoIP, the device can communicate with FXO 3804 of TAIWAN Welltech and DT60 of BEIJING JIAXUN FEIHONG, At that time, Ethereal and PalmTool of PA1688 testing are introduced; In CATV, flatness ,signal graphics of radio frequency are tested by CATV stroboscope.

使用示波器测试数据部分的电路信号波形，使用网络分析仪测试丢包率、吞吐量、时延和背压等以太网指标的测试，并记录最终测试结果；电话部分主要是与台湾伟桥的FXO 3804和北京佳讯飞鸿的E1数字中继网关DT60，实现基于H.323协议的VoIP电话通信，同时介绍使用Ethereal软件和PA1688专用测试工具PalmTool的测试分析情况；电视部分主要是使用CATV频谱仪测试输出射频信号的平坦度、信号波形等分析信号质量，并通过实际电视接收观察输出的射频信号质量。

Smart label is one kind of special type transponder, who consists of a radio frequency chip and a subminiature antenna.

射频识别系统由读写器和应答器构成，电子标签是应答器的一种形式，它由一颗射频芯片及一个天线构成。

Some of the proposed new radio architectures [3] move the need for a tunable frequency synthesizer from RF to IF, but today's superheterodyne architecture always needs a tunable RF synthesizer.

一些新提出的无线电系统架构[3]将使用可调谐的频率合成器的地方由射频变为中频，但目前的超外差式的结构仍然一直使用可调谐的射频合成器。

Air wire is a important component of radio controller , it is composed of the series-parallel connection syntony circuit by day coil and capacitance, with rapid and intense high frequency interface coupling, one side needs and the card parameter mates, the feasible card is able to get the sufficient energy and the entire data , the data taking-over returns and with the card responding to , another aspect will mate with to enlarging a circuit again , makes the radio controller gain sufficient electric energy in the process of read-write card.

天线是射频控制器的一个重要组成部分，它由天线圈与电容组成串并联谐振回路，与高频接口紧密耦合，一方面要与卡片参数匹配，使得卡片能够得到充足的能量和完整的数据，并且把卡片的响应数据接收回来，另一方面又要与放大电路匹配，使射频控制器在读写卡过程中获得足够的电能。

We are also distributor of the following companies:Pfeiffer Vacuum-turbo molecular pump, other types of pumps, gauges, Helium leak detector, mass spectrometer; Maxtek, Inc-Quartz crystal thin film deposition controller and sensors; Telemark Inc-E-beam source and power supply, optical thin film monitor; Comdel, Inc-DC and RF power supply; Angstrom Sciences-Magnetron target and materials; Oxford Scientific Limited-Atom sources; Plasma Quest Ltd-Plasma systems for coating and etching; Sentech Instruments GmbH-Ellipsometers.

我们代理的产品包括德国普发真空的全线真空产品(分子泵等各种真空泵，真空计，检漏仪，质谱仪，各种真空零部件)；美国美泰克公司的石英晶体膜厚监测仪，传感器；美国泰利玛科公司的电子枪和光学膜厚控制仪等；美国康戴尔公司的射频，中频和直流电源；英国牛津科学公司的微波等离子体源，电子束蒸发源，原子源，高能电子衍射枪；英国PQL公司等离子体溅射镀膜设备，美国安斯超科学公司的磁控溅射阴极及溅射靶材，德国森泰科仪器公司的椭偏膜厚测量仪和等离子刻蚀沉积设备等。

This paper presents a low voltage, low power RF/analog front-end circuit for passive ultra high frequency radio frequency identification tags.

提出了一种适用于无源超高频射频识别标签的低电压低功耗射频／模拟前端电路。

This paper introduces the method,step and notice of using vector network analyzer to measure broadband swept frequency Radar Cross Section in RF simulation anechoic chamber,and elaborates the principle test technology to improve the measurement accuracy.

介绍了利用矢量网络分析仪在射频仿真暗室内进行宽带扫频雷达散射截面测量的方法、步骤、应注意的问题，以及为提高测量精度采用的主要测试技术，并结合实验测试证明了该方法在射频仿真暗室中进行雷达散射截面测量的可行性。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。