查询词典 multiplexing unit

The vestigial side band and coded orthogonal frequency division multiplexing digital transmission systems are accepted in digital HDTV transmission system. This paper gives a theoretical view to the performance of these two systems and the results of the systems simulation.

从理论上对数字高清晰度电视的两种传输方式——VSB和COFDM数字传输系统的性能进行了比较，给出了系统模拟结果，理论分析和模拟结果都证明这两种传输系统在性能上是等价的。

Experimental results show the availability of two interferometers multiplexing.

实验结果表明了两路干涉仪复用的可行性。

With the development of optical communication system from point-to-point to multi-wavelength optical network, optical add/drop multiplexers are considered key components in wavelength-division-multiplexing system.

中文摘要随着光通信系统从单波长点对点的光线路系统向多波长网络化演进，光分插复用器作为光传输网的重要器件逐渐变得越来越重要。

According to the self-trapping that takes place in both transversedimensions,we show that an addressing optical switch is possible bychanging the lateral displacement of the beam,that the soliton wavelengthdivision multiplexing devices may be made by using the self-deflection ofspatial solitons,and that soliton devices with two or three controlledparameters are made by using screening-photovoltaic solitons for shortcircuit or closed circuit with an external resistor.

根据光孤子的自陷获仅发生在横向上，由此我们提出：控制横向空间光孤子的方法实现光的快速互连切换光开关；用短路或有外电阻的屏蔽光伏孤子研制具有两种或三种控制参数的孤子器件；用控制空间光孤子的自偏转的方法研制波分复用器。

Adopting multiplexing technique and making use of communication line between CSC and CS to achieve simultaneous transmission of ISDN signal and electric power. According to the variation of circuit equivalent resistance to design detection circuit, which can judge that the line is short circuit or open circuit and the commercial power is working normally or failure. When the reserve power supply is working, the system judges its operation status by voltage and current detection circuit. Making use of the characteristic of the gas discharge tube to achieve suspension system detection of power line touching. Transmitting information collected up to PC by RS485 for the purpose of centralized monitoring.

采用复用技术，利用基站控制器和基站间的通信线路实现ISDN信号和电力的共同传输；根据线路等效电阻的变化设计探测电路，来判断开路、短路、市电供电、市电停电等情况；在后备电源工作时，通过电压、电流采样电路判断电源的运行情况；利用气体放电管的特性实现悬浮系统动力线搭接的检测；采用RS-485通信方式将采集到的现场信息上传以实现集中监控。

Moreover, our heating unit would function at 25C, whereas the Japanese unit was limited to 15C.

并且，我们的供热设备在零下25摄氏度仍能运行，而日本的设备在零下15度就不行了。

Article 5The principal of each aviation unit shall be responsible for his unit's abidance by these Rules.

第五条 航空单位的负责人对本单位遵守本规则负责。

It is described in graphical mode, as shown in figure 17, the abscissa stands for time, with space interval 60, unit second; the ordinate represents height, with space interval 50, unit 0.1Km.

用图形方式描述，如图17所示，横坐标是时间，刻度间隔是60，单位为秒；纵坐标是高度，刻度间隔是50，单位为0.1Km。

Paper and delivery section are for business card printing unit services, Business card printing unit is the absolute overall debugging.

输纸局部和收纸局部都是为制卡单位任职的，所以制卡单位是分座机械调试的万万基准。

a kind of design project of multifunction electric power quality gauged instrument based on virtual instrument is put forward in this article.this system integrates virtual instrument programming and power electronics together,to realize diverse signals of current electric power quality field allin one.the integrated signal generator unit which carries out the collection of high speed digital data,d/ a conversion and analog output in four channels,unsymmetrical synchro control fifo etc.by fpga are introduced,the flow of electric power system various signal which generates by vc programming is elaborated,and the structural design of signal amplification unit is analysed.the experiment text result shows that this gauged instrument has attained current advanced high grade of accuracy and it will accelerate the steps of electric power quality calibration because of its accuracy and versatility.

摘 要：提出一种基于虚拟仪器技术的多功能电能质量标定仪的设计方案，采用虚拟仪器编程技术和电力电子技术相结合实现集目前电能质量领域的多样信号于一体。介绍采用fpga实现高速数字量采集、d/a转换及4通道模拟量输出、非对称同步控制fifo等的集成信号发生单元，阐述利用vc编程实现的电力系统多样信号的产生流程，分析信号放大单元的结构设计。实验测试结果表明该标定仪达到目前先进的高精度等级，由于其准确性和多功能性将加快电能质量标定的步伐。

The statistical analysis of this large set of mutations has led us to propose a diagnostic strategy that should help with the molecular work-up of optic neuropathies.

这一大系列基因突变的统计学分析引导我们提出一个诊断策略，可以帮助我们对视神经病变进行分子学的诊断检查。

The results show that the pipe grouting changes the mechanical parameters of surrounding rocks to achieve the security of engineering objectives by reinforcing surrounding rocks and bolcking the water.

研究表明：小导管注浆一方面改变了围岩的力学参数，另一方面利用浆液的固结特性可以实现堵水和加固围岩的工程目标，使隧道在开挖过程中的安全得到保障。