传输损耗

High frequency, the signal transmission cable surface, the smaller size of the Traverse greater loss.

高频时，信号在导线表面传输，尺寸越小的导线产生的损耗越大。

We made the light absorption coefficient measurement system with Nuclepore filter which were used to collected aerosol particles. The system has one laser beam which is split into two laser beam, one being information light which transfer through glass pipe, the other being reference light which transfer directly through atmosphere. so the measurement system could well eliminate the effect of all kinds of measurement errors which were caused by optical ullage and circuit noises and power fluction.

本测量系统利用核孔过滤膜采集气溶胶粒子，测量系统的光路由同一光束分为两路光组成，一路为信号光，通过光管传输，另一路为参考光，通过信号光和参考光相比很好地消除了测量系统中由于光管损耗、电路放大倍数的差异及光功率起伏等因素所引入的误差对吸收系数测量的影响。

The major research includes the following three points. First, using finite element method, the influence factors on propagation properties for PMF couplers are analyzed, including the shape of coupler cross-section, the taper of coupler bipyramidal and the angle deviation of the birefringent axes.

基于热-结构-电磁多物理场耦合有限元方法，分析了保偏光纤耦合器的传输特性和耦合系数在熔锥区的变化规律，从而求解耦合模方程，得到偏振光经过耦合器后的光功率分布，继而对保偏光纤耦合器的性能参数分光比、消光比及附加损耗进行理论分析。

Some of these considderationsinclude insertion loss, cross talk, propagation delay, and unterminated stubs.

需要考虑的因素包括插入损耗、串扰、传输延迟和未端接短截线。

Theoretical calculation shows optimum thickness of AgI film for simultaneous low-loss delivery of green and infrared laser light.

分析了绿色导航光和红外激光同时低损耗传输的光纤结构参量。

At present,information technology is rapidly developing to high integrated and complex direction, more and more microchip components have been integrated on one substrate. In order to minish the volume and weight of the system, one-way is to develop the micro-integrated technology, and another one depends on miniaturizing the components.

目前IT系统向高集成度、高频宽带化方向发展，要求在更小的基片上集成更多的元器件，这除了依靠高密度集成技术的发展外，从器件本身出发，只有研制小型化、薄膜化的器件，以减小系统的整体体积、重量，才能达到减小功率损耗、提高信号传输效率的要求。

A7800 Features: 10 Mb s Manchester encoding decoding with receive clock recovery Patented digital phase locked loop decoder re- quires no precision external components Decodes Manchester data with up to g18 ns of jitter Loopback capability for diagnostics Externally selectable half or full step modes of opera- tion at transmit output Squelch circuits at the receive and collision inputs re- ject noise High voltage protection at transceiver interface (16V) TTL MOS compatible controller interface Connects directly to the transceiver cable A7800 Maximum Ratings: A7800 Pinout:· NPT IGBT technology · low saturation voltage · low switching losses · switching frequency up to 30 kHz · square RBSOA, no latch up · high short circuit capability · positive temperature coefficient for easy parallelling · MOS input, voltage controlled · ultra fast free wheeling diodes · solderable pins for PCB mounting · package with copper base plate

A7800特点： 10兆s曼彻斯特编码与接收时钟恢复专利解码数字锁相环解码器重新奎雷斯没有精确数据的外部元件曼彻斯特解码高达全部G18抖动纳秒环回功能用于诊断外部可选的一半或整步模式的歌剧和灰在传输和接收碰撞投入重新ject高噪音在收发器接口（16V的）马鞍山的TTL兼容控制器接口电压保护输出静噪电路直接连接到收发器的电缆 A7800最大额定值： A7800引脚说明：·不扩散核武器条约IGBT技术·低饱和电压·低开关损耗·开关频率可达30千赫·平方米RBSOA，没有锁定了高短路能力··正温度，便于parallelling·马鞍山消耗系数，电压控制·超高速免费·印刷电路板焊接的引脚安装·铜底板包续流二极管

Base Station type Software versionTypes of carrier frequency board adoptedTypes of combiner adoptedWhether had obtained the network license or notIndoor type or outdoor type Whether the master port is separated from the remote-port The maximum carrier frequency capacity of single cabinet The maximum supportable sector numbers of single cabinetWhether it is dual-carrier frequency board or notMust it be paired configuration if it's dual-carrier frequency board (namely, the type of single carrier frequency station could only configure the dual-carrier frequency on hardware) The maximum achievable configuration of a single station of the single cabinetReceiver sensitivity The maximum expand capacity of a single base station (the maximum number of TRX in configuration / the number of cabinets which is required)(fill in according with the three sectors) Top box transmitted power (given separately a grade one combine and a grade two combine) The maximum output power of amplifier (voice, a single logical carrier frequency) The maximum output power of amplifier (EGPRS, a single logical carrier frequency)Whether it has tower-interfaceWhether it has built-in lightning protectionWhether it support the ultra-long cover / whether it need for software support (give simple description that how hardware and software could achieve this) The supporting condition of EGSM (it should be supported including by the carrier frequency, combiner) Dual-band carrier wave (whether it supports the mixed use of 900 M/1800M in the same cabinet) The commonality of duplicate parts Whether it can built-in transmission unitThe single cabinet size (high × width × deep) Installation method Whether it can place against the wallThe basic frame full-configured weight and the supportable number of carrier frequencyThe expansion frame full-configured weight and the supportable number of carrier frequency

基站型号软件版本号采用载频板型号采用合路器型号是否已取得入网许可室内型or室外型是否是主远端分离单机柜最大载频容量单机柜最大支持的扇区数是否是双载频板如是双载频板，是否必须成对配置(即单载频站型只能硬件配置双载频)单机柜可达到的单站最大配置接收机灵敏度单基站最大扩展能力(最大配置TRX数/需机柜数)(按3扇区填写)机顶发射功率(分别给出一级合路与两级合路)功放最大输出功率功放最大输出功率(EGPRS，单个逻辑载频)有无塔放接口有无内置避雷装置是否支持超远覆盖/是否需要软件支持(简单描述软硬件如何实现)EGSM支持情况(包括载频、合路器均应支持)双频段载波（是否支持900M/1800M在同一机柜内混合使用）备件通用性是否可以内置传输单元单机柜尺寸安装方式可否靠墙放置基本架满配重量及支持载频数扩容架满配重量及支持载频数是否支持基本架与扩容架跨扇区满配功耗满配时重量供电方式机柜进出线方式合路器损耗合路能力：几合一单扇区最大支持几载频合路到一副天线/采用几个合路器单扇区载频达到需要增加一副天线时，是否支持两级合路换以不增加天线如两级合路插损为是否支持基带跳频和合成跳频每单个合路器在从低载频数向高载频数扩容时，是否还需要增加硬件可用性指标MTBFMTTR系统中断服务时间硬件是否支持EGPRS本次报价软件版本号开始支持EGPRS的软件版本号其他特点注： 1 应分别填写出来按照本次报价要求所采用的全部BTS型号和采用的合路器型号 2 列出本报价要求的全部室外型基站与高功放单元

The arrangement and grounding mode of medium voltage cable concerns the transmission system capacity, line fosses and safe problem, and affects construction and operation cost.

中压电缆布置及接地方式关系着系统传输容量、线路损耗及安全问题，影响到建设成本和运营费用。

To achieve the circuit capacity of maximal power transmission and least return loss, impedance matching networks are generally inserted in the input and output ports,compnter simulation solves the problem of how to settle the impedance matching network composition and component parameters in high efficiency.

射频电路设计中为了达到最大功率传输、减少回波损耗等电路性能，一般在输入和输出端加入阻抗匹配网络来加以改善，计算机仿真高效地解决了确定阻抗匹配网络结构及各元件参数的问题，通过ADS仿真确定了射频电路中匹配网络的元件最佳参数。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了