直流的

High-voltage storage capacitor is the common device in pulse power system and it is also widely used in weapon. High reliability must be required because of its special used situation.

高压直流储能电容器是脉冲功率系统中的常用器件，在武器设备中有着广泛应用，其特殊的应用场合要求其要具有较高的可靠性。

The dynamic equation describing the relationship between surface charge density and voltage is established. The constants of voltage／field strength A and B are introduced.

建立了电压与绝缘子表面电荷分布的动态方程，分析了直流电压作用下表面电荷的积聚过程，并给出了绝缘子表面电荷动态分布的近似表达式。

In certain types of equipment such as switchgear, the part corresponding to one of the phase in A.C.

在某些设备中，例如开关设备，对应于交流中的一个相或直流中的一个极性的部分。

In the paper,the theory of artificial intelligence is applied to fault diagnosis of synchronous motor which is widely used in industry.

本文针对工业生产中使用的直流电动机，应用人工智能的相关理论对其故障进行了广泛深入的研究。

The DC working points are not necessary to be involved in the above two predictive controllers, which are timesaving and more efficient for their practical implementation.

即不必考虑过程的直流工作点。这给预测控制算法的在线实现带来了很大的方便。

The result indicate that: the electrodeposition of zinc on nickel and tungsten substrates involves instantaneous three-dimensional nucleation. The coating is the best when the current density is 4mA/cm2 and the temperature is 80 ℃. The coating by the method of the impulse electrodeposition is better than the direct current electrodeposition. Especially when f is 100Hz, ton/toff is 2/8 and J is 8mA/cm2, the coating is clean and uniformity. The crystal size is nearly 0.3μ m .

结果表明：阴极反应为准可逆反应，锌离子在镍电极和钨电极上形核是三维瞬时形核半球形扩散长大过程，直流电流密度为4mA/cm2，温度为80 ℃时，镀层质量最好；脉冲电沉积得到的镀层要优于直流电沉积得到的镀层，尤其在脉冲宽度为2ms，脉冲间隔为8ms，电流密度为8mA/cm2时，得到的镀层光滑而均匀，颗粒大小接近0.3μm。

Example The periodic function shown in the Fig. is known as a half-wave rectified sine wave. Find the trigonometric Fourier series of the function f.

角频率为横坐标，每个正弦分量(直流分量相当于频率为零的正弦量)的大小为离散的纵坐标值

To evaluate the severity of damage and identify the damaged winding s, this paper presents a method that uses the comprehensive information, including the value and waveform of the fault current, insulation resistance, oil-dissolved gas analysis, winding resistance, turns ratio, deformation detection, and it is of significance to the fault elimination.

介绍了综合利用短路电流值和波形、绝缘电阻、色谱、直流电阻、变压比、绕组变形等资料和手段判断大型变压器低压侧出口短路事故的严重程度、被损坏绕组的相别，为故障的处理提供参考。

High-performance RISC CPU · Only 35 single-word instructions to learn - All single-cycle instructions except for program branches which are two-cycle · Operating speed: DC - 20 MHz clock input DC - 200 ns instruction cycle · Interrupt capability (up to 7 internal/external interrupt sources)· 8-level deep hardware stack · Direct, Indirect and Relative Addressing modes

高性能的RISC CPU·只有35单条指令学习-除了程序分支是两个周期·工作速度：直流- 20 MHz的时钟输入DC - 200 ns的所有单周期指令指令周期·中断能力（/外部中断源，高达7内部）·8级深硬件堆栈·直接，间接和相对寻址方式

Buck and Boost topology switching power conversion circuits as the core of this system, ultra low power MSP430F1222 microcontroller-based controller, microcontroller produced by the PWM pulse width modulation signals, respectively, two-way control switch voltage conversion circuit the turn-on and turn-off in order to achieve the above two kinds of topology switching power conversion circuit, and then to draw power from the flow of electrical energy has been filled into the rechargeable battery, and using microcontroller A / D input voltage implementation of the monitoring, according to the input voltage switching buck - circuit at a lower cost to achieve a highly efficient energy transfer, and the circuit is simple, the parameter to determine easy, self-low power consumption,to achieve full-featured.

本系统以Buck降压和Boost升压拓扑结构开关电源变换电路为核心，以超低功耗单片机MSP430F1222为主控器，由单片机产生PWM脉宽调制信号，分别控制两路电压变换电路中开关管的导通与关断从而实现以上两种拓扑结构开关电源变换电路，进而从一直流电源中吸取电能充入可充电电池，并利用单片机A/D对输入电压实施监测，根据输入电压切换升降压电路，以较低的成本实现了高效率的电能转移，并且电路简单、参数确定容易，自身功耗低，实现功能完整。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。