直流的

According to the ultrasonic motors chich were proposed and designed in our laboratory, a novel driving circuits has been developed and it can generate signal with the frequency ranging from 10 to 100 kHz, the value of Vp-p below 180 V.

该驱动电路由干电池提供直流电源，产生频率范围为10-100 kHz，电压峰峰值为0-180 V可调的超声波信号。

Voltage Source and Current Source, Thevenin Theory, Trouble Shooting, Characteristic Curve of Diode, Diode Models, Rectifier Circuits, Input Filtering Capacitor, Voltage Multiplier Circuits, Limiter and Clipper Circuits, DC Clampers and Peak-to-peak Detectors, Zener Diode, Zener Diode Rectifier, Photoelectric Devices, Collector-Emitter Junction, Transistor Characteristics of common-emitter, Base Bias, LED Dirver, Establishing a Stable Q-point, PNP Transistor Biasing, Transistor Biasing, Coupling and By-Pass Capacitors, AC Emitter Resistance, Common-Emitter Amplifier, Other Common-Emitter Amplifiers, Cascaded Common-Emitter Amplifiers, AC Load Line, Emitter Follower, Class B Push-pull Amplifiers, JFET Characteristic Curve, JFET Biasing, JFET Amplifier, VMOS Circuit, Differential Amplifier, Operational Amplifier, Non-inverting Feedback, Negative Feedback.

电子学实验( S0704)(1，1)/应用电子学实验( S0472)(1，1)电压源和电流源、戴维宁定理、故障排除、二极体特性曲线、二极体近似模型、整流电路、电容-输入型滤波器、倍压电路、限制器电路和峰值检测电路、直流定位器与峰对峰检测器、齐纳二极体、齐纳二极体整流器、光电元件、集射极接面、集极特性曲线、基极偏压、LED驱动器、建立一个稳定的工作点 Q 、 PNP 电晶体偏压、电晶体偏压、耦合及旁路电容、交流射极电阻、共射极放大器、其他 CE 放大器、串接共射极放大器、交流负载线、射极随耦器、 B 类推挽式放大器、 JFET 特性曲线、 JFET 偏压、 JFET 放大器、 VMOS 电路、差动放大器、运算放大器、非反向电压回授、负回授。

The coil is DC device, whose charge and discharge is usually ac complished through an ac utility grid.

线圈是直流装置，其能量通常是通过交流电力网进行储存与释放的。

Interconnection are ac complished, including the analysis of th e low frequency oscillations and

年全国大同步联网方案中的低频振荡和暂态稳定性分析，2030 年全国纯直流联

72"Wide sheet line consisting of the following: extruder, 30:1 L/D ratio, electrically heated, air cooled. 300 hp DC drive Control panel. hydraulic screen changer with power pack, 60"wide sheet dies with external deckles.

72&宽板材生产线包括以下设备：挤塑机(长径比30：1，电热，风冷)，300马力直流驱动控制面板，自带动力单元的液压换网器，60&宽板材外堵式模头

Each transmitter can report up to three sensor conditions back to the iStatus monitoring software. The sensor options include; Temperature, Current, DC voltage, Temperature/Humidity/Dewpoint, and discrete contact.

每个发送器可以申报最多三个传感器条件回到iStatus监控软件，该传感器的选择包括：温度，电流，直流电压，温度/湿度/露点和分立接触。

This real-time system includes measurement and control of analogs, digitals, temperature, DC motor and stepping motor.

这个实时系统对多个开关量、模拟量、温度信号、直流电动机和步进电动机等进行实时的数据采集和控制。

Exciters are direct - current generators usually mounted on the generator shaft.

励磁装置是由直流发电机来提供电流的，通常安放在发电机轴上。

The direct current feeder cable is one of the key devices for the safety operation of mass transit system. The insulation of DC feeder cable is serious hidden trouble factor threatened the operation safety of mass urban transit.

由于敷设环境差，直流馈出电缆容易因绝缘老化、受损发生故障，严重威胁着城市轨道交通的供电安全。

The study results indicate that the linear relation between the flashover voltage and the length of 800kV DC composite insulator is high-blooded.

本文提出了800kV 直流复合绝缘子的样品基本结构参数和全电压全尺寸污秽特性试验方案。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。