查询词典 closed circuit television

Recuring to the assistance from ADS , which is used for radio frequency simulating ,and general circuit simulating software - MULTISUM , several key technoledgeincluding RF signals disposing , local swept oscilating circuit , system control and frequency display etc. were discussed emphatically in the treatise . Not only the relevant theory but also the hardware circuit design were elaborated explicitly .

本文借助于射频模拟仿真软件ADS以及通用电路仿真软件MULTISIM，着重研究了弹道监测接收机的射频调理过程、本振扫频振荡技术、控制和显示技术等几个部分，在充分地探讨了相关理论的基础上，给出了相应的电路硬件设计。

The relations between the simulation circuit parameters and the linear motor parameters were achieved by analyzing the equivalent circuit of the linear motor and the simulation circuit of piston displacement self-sensor.

通过分析直线压缩机的直线电机的等效电路和活塞位移自传感器的模拟电路，得出了模拟电路参数与直线电机参数之间的关系。

To presents the methods of designing and making circuit board for experimental teaching by computer, laser printer and heating roller, which are the methods of designing and making printed circuit board on one-side copper plate and the circuit drawing, on insulated epoxyresin base.

介绍了利用计算机、激光打印机和制板机设计制作实验教学电路板的方法。即在单面覆铜板的铜面设计制作印制电路板，在绝缘玻纤环氧树脂基面设计制作电路原理图。

The system consists of power supply circuit, circuit-level preamp, power amplifier circuit, output stage components.

该系统由电源电路、前置放大级电路、功率放大电路电路、输出级组成。

The signal detecting circuit, the constant-speed wire-feeding circuit and the programmed control system during the short circuit of CO_2 welding are all designed and debugged in the dissertation.

本文主要对CO_2焊短路过渡中的信号检测电路、送丝电路和程序控制系统等进行了设计与调试。

This article angle has analyzed the higher professional technical education from CBE/DACUM "the electrical control technology" the curriculum ability localization, according to the higher professional technical education "the electrical control technology" the curriculum ability localization, point out the insufficiency and flaw existed in commonly used control electric appliance choice, electrical pilot wire road map, electricity control system installment, wiring craft, electrical control line fault diagnosis system approach, new starting velocity modulation equipment and control circuit, control circuit and main circuit aspect and so on.

摘要本文从CBE/DACUM角度分析了高职&电气控制技术&课程的能力定位，根据高职&电气控制技术&课程的能力定位，指出了现行高职&电气控制技术&教材在常用控制电器选择、电气控制线路图、电气控制系统安装、接线工艺、电气控制线路故障诊断的系统方法、新型起动调速设备及控制电路、控制电路与主电路的连接等方面存在的不足和缺陷。

The products concerned include:magnetic type intermediate relays, small capacity AC contactors, switching capacitor contactors, fuses with material filled, residual current operated circuit breakers, frame rack type circuit breakers and plastic cased type circuit breakers etc.

涉及的产品包括：电磁式中间继电器、小容量交流接触器、切换电容接触器、有填料熔断器、剩余电流动作断路器、框架式断路器和塑壳武断路器等。

The one-cycle control equation and control circuit in three-phase bridge is similar to the three-phase three-wire system,the control equation and control circuit in N-phase half-bridge is mainly set up through analysis to the circuit.

有源电力滤波器是一种可动态地补偿谐波和无功电流的电力电子装置，四桥臂三相四线制APF可用于三相四线系统的谐波和无功电流的补偿。

Cable .Make use of this principle, we can quickly locate the target cable or break point from large amount of cables, under carpet, the inner of decoration wall and over ceiling1 operation is simple , reliable , the interface is nimble , use is broad , bionic form , carry-over are convenient, since our link tester has two signal output port, it can work when switch is running, this is very convenient. 2 applies to all metal cable such as network cable , tele phone line cable , video cable , automobile circuit .it can not be work with high voltage(above 80V),if you want to locate it ,please turn off the cable power supply3 can test the telephone line polarity, connectedness, rough position of breaking point.4 uses the two crocodile clamp to avoid getting rid of the job of make network cable. Use the RJ45/RJ11 interface can connect to the network and the telephone line directly.5 link tester can find out that pair of circuit line cable from large mount of cables. 6 high amplitude ranks 200 times amplification circuit is sui table to locate long distance cable.7 two-sided network lines sequence indicator is easy to examine the network line cable whether or not correctly conveniently. 8 portable types multifunctional bag can encase most of your engineering tools; remit your messy carry-over of implement bothering. 9 adopt two 9V batteries.

线路通产品特点：1 操作简单、性能可靠，接口灵活、用途广泛，仿生外形、携带方便，由于本设备采用了信号双路输出方式，可以解决交换机工作状态下使用，避免了关掉交换机影响其他线路的使用的麻烦。2 适用于查找网络电缆、电话线路、视频电缆、汽车电路、无强电状态下的所有金属电缆。3 可以测试电话线路极性、连通性，断点大概位置。4 两个鳄鱼嘴夹，避免了去做水晶头的麻烦，RJ45/RJ11接口线，可直接连接网络和电话线模块。5 寻线器快速地在众多紊乱的线路中找出需要查找的那一对线路线缆。6 高音频振幅级别200倍的放大电路，适合长距离电缆定位。7 双面网络线续灯可以更直观方便的检查校正网络线续线路连接是否正确。8 便携式多功能软包，可以把您工程施工、维护的基本工具装齐，免除您工具散乱携带的麻烦。9 本寻线器采用2节9V电池。

This system was composed of a temperature controlled tank, switch measurement circuit, temperature control circuit, interface circuit, an industrial manipulative computer, and so on.

本文介绍了温度继电器自动测试系统的设计，此系统由温控箱、开关量检测电路、温度控制电路、接口电路及工控机等硬件组成。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。