查询词典 voltage gradient

With building and operating of several high voltage DC electric transmission lines in China, it is very important for providing domestic high voltage DC metal oxide arresters applied in HVDC system.

随着中国多条高压直流输电线路的建成和运营，直流输电系统用高压直流金属氧化物避雷器的国产化具有重要的意义。

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。

Control the high voltage and low voltage (technological process and argument) of electric demist precipitator following the control core of PLC.

多台电除雾器独立组成系统，以 PLC 为控制核心，对电除雾系统的高压和低压系统统一进行控制，并通过通讯方式与上位机连接，实现上位机远程控制。

The radiation by non-thermal plasma can accelerate formaldehyde thansform and make an increase of 29.61% in depurated efficiency. The surface modification makes no obvious difference in depurated efficiency. The chemical modification avails formaldehyde reduction and ACF coated with nano- TiO2 is the best of all that can enhand the depurated efficiency to 94%. The great influence of parameters on depurated efficiency , such as applied voltage and reaction time , shows that an increase in either applied voltage or reaction time enhance formaldehyde conversion.

研究结果表明：低温等离子体辐射能促进甲醛净化，可使其净化效率提高29.61%；表面改性对净化效率没有明显影响；化学改性有利于甲醛净化，其中负载纳米TiO2改性方案最佳，其净化效率高达94%；电源电压和反应时间等参数对净化效率也有较大影响，电压越大，时间越长就越有利于甲醛的去除。

We adopted DCJTB and TBPe to make two homochrom OLEDs as the red and blue dyes, the configurations are respectively as follows: ITO/CuPc(15nm)/NPB(50nm)/Alq3(30 nm):rubrene: DCJTB(6.1)/Alq3(30nm)/LiF(1nm)/Al(100nm),(x=2,3.7,4.2,5 nm,the dopped concentration is 1.1%,2.1%,2.3% and 2.8% respective -ly) for red OLEDs and ITO/CuPc(150 nm)/NPB(500 nm)/ADN(300 nm):TBPe(30 nm)/Alq3(350 nm)/RbF(20 nm)/Al(1,000 nm)for blue OLED. We discussed the electroluminescent mechanism and the infection of the dopped concentration of rubrene on the perform -ances of red OLEDs; And after a lot of designments and manufactures we found an integrated and reasonable scheme,and carried out some test -ings and discussions on the characteristics of current -voltage curve, efficiency- voltage curve and luminescence-spectrum curve and so on. Subsequently,we made two kinds of WOLEDs.

然后分别采用以DCJTB和TBPe作为红色、蓝色发光染料制作了两种单色OLED器件，制备了器件结构为ATO/CuPc(15nm)/NPB(50nm)/Alq3(30 nm)：rubrene：DCJTB(6.1 nm)/Alq3(30nm)/LiF(1nm)/ Al(100nm)，(其中x=2、3.7、4.2、5nm，rubrene的掺杂比例为1.1%、2.1%、2.3%、2.8%)的红光OLED器件和结构为ITO/CuPc(150 nm)/NPB(500 nm)/ADN(300 nm)：TBPe(30 nm)/Alq3(350 nm)/RbF(20 nm)/Al(1，000 nm)的蓝光OLED器件；讨论了红光OLED器件的发光机理，以及rubrene的掺杂浓度对发光效率等性能的影响；从蓝光器件的设计和制备入手，摸索出了一套完整而可行的制作方案，分别对器件的电压-亮度特性、电压-发光效率特性及发光光谱等特性进行了测试与讨论。

The influence of charging parameters (such as charging voltage, charging time and charging temperature, etc.) on piezoelectricity and its thermal stability of cellular polypropylene film electrets was studied by means of contact charging and constant voltage corona charging methods and the thermal stimulated discharge technique.

通过接触法充电、恒压电晕充电，以及开路热刺激放电技术，对充电参数(例如充电电压，充电时间和充电温度等)对聚丙烯蜂窝膜驻极体的压电性及其热稳定性的影响的研究，并从孔洞型薄膜压电体的材料结构和理论模型出发，讨论了这些参数对其影响的原因，分析了与压电活性密切相关的空间电荷的动态特性。

At this point, you should check the oscillation manifold circuit, the voltage should be the normal 10 or so (Special reminder: because the test should be carried out in the electrized, and has high-voltage power supply, and therefore pay special attention to personal safety, do not try to touch any part of the power supply).

这时，应先检查振荡集成块的供电电路，其正常的电压应该在10V左右（特别提醒：由于测试电压应在通电情况下进行，而电源板上有高压电，因此要特别注意人身安全，不可尝试直接触摸电源的任何部分）。

This voltage is higher than the supply voltage and energises the panel into emitting light.

这个电压是电压高于供应和energises发光的面板为。

The following exciting results are revealed: 1 When considering the influence of some nonlinear elements such as hard-limit of exciters, the effects of some devices such as Power System Stabilizer and Static Var Compensator which can introduce positive damping in power system, the reasonability of system parameter values in simulation, the SNB surface and HB surface on the boundary of SSSR will turn close to each other and even coalesce together; 2 Under some conditions, coupling between slow exciters and shunt capacitors will bring negative damping in power system dynamics, which increases the possibility of oscillatory instability. So the power system with mass shunt compensators is easily subjected to the oscillatory instability. In recent years, chaotic phenomena of power system have been reported many times. Some simulation studies even found chaos existing inside the power system SSSR. In this dissertation, chaotic phenomena in power systems are thoroughly studied in order to make clear the relation of chaos and SSSR. The following results are derived: 1 Based on Li-Yorke Theorem and their definition on the chaos, the existence of chaos in power system is verified; 2 Three possible routes of causing chaos in power system are found and deeply investigated. They are route of cascading period doubling, route of directly initial energizing and route of torus bifurcation (or quasi-periodicity). The latter two routes are investigated for the first time in power system stability studies; 3 When the stability conditions of chaos are broken, it is found they can lead to voltage collapse, angle divergence, or voltage collapse with angle divergence simultaneously.

针对在电力系统小扰动稳定区域内可能存在混沌吸引域的有关报道，本文深入研究了电力系统混沌现象的出现途径和与系统失稳模式之间的关系：1利用Li-Yorke定理和Li-Yorke的混沌定义，从理论上证明了电力系统混沌现象的存在性；2发现了电力系统中导致混沌出现的三种可能途径：倍周期分岔导致混沌、初始能量直接激发混沌和经由环面分岔导致混沌，并对后两种新发现的途径进行了较为细致的研究；3发现了混沌极限环破裂导致电压崩溃、角度失稳以及电压崩溃和角度失稳同时出现的现象，其中混沌极限环破裂导致系统角度失稳和电压崩溃及角度失稳同时出现的现象均属首次报道；4证明由微分-代数方程描述的系统模型，其小扰动稳定域的边界只包含HB、SNB和SIB三种分岔界面，在SSSR的内部和边界上，均不可能存在会导致混沌的点，从而将混沌现象排除在小扰动稳定域的研究之外，简化了后者的研究工作。

In the IEEE 50 generators test system, the proposed on-line voltage stability monitoring method is tested, the recursive square-root least squares filter with a forget factor is applied to track the parameters, and the results indicate that it can identify the critical bus effectively so as to realize on-line voltage stability monitoring.

将提出的电压稳定在线监测方法在IEEE 50机测试系统进行了仿真，参数辨识采用递推的带遗忘因子平方根最小二乘算法，结果表明它能有效地识别出电压稳定薄弱节点、实现电压稳定在线监测。

I was up all night because I was in pain, she said.

我整夜，因为我在疼痛，她说。

A crow caws /craoks.

乌鸦叫。 51-论文网