直流的

The microstructures and optical properties of the films were characterized with X-ray diffraction, small angle X-ray reflection, and ultraviolet visible absorption spectroscopy.

通过直流反应磁控溅射的方法制备了氧化铅薄膜，并通过XRD和紫外－可见光吸收谱对薄膜的晶体结构和光学性能进行了表征。

The stability of high voltage direct current system is studied by the method of dynamic system in this paper.

本文用动力系统的方法研究了直流输电系统的稳定性。

This design detailed described the direct current electric voltage of the test and the manifestation.

数字电压表的设计与总结详细描述了直流电压的测试与显示。

Swithced reluctance machine is a new structure of electromotor. Combining this new structure with the modem power electronics technique and modem control technique, swithced reluctance drive has been one of the pop issues of the development of modem electric dirve.

开关型磁阻电动机调速系统融开关型磁阻电动机与现代电力电子技术、控制技术为一体，兼有异步电动机变频调速系统和直流电动机调速系统的优点，已经成为当代电气传动发展的热门课题之一。

A new type of battery discharger was discussed, the main circuit of which adopted boost, applied switching power technology, and used PI regulator to control.

蓄电池作为电源在直流系统中起着极其重要的作用，在电力、通讯、金融、交通、国防等行业得到广泛的应用。

A DC motor driver with constant frequency PWM is developed based on PIC, and the running performance of the DC motor is improved greatly.

另外使用PIC器件完成了单芯片集成式运行电路的设计，实现了直流电机的正常驱动，简化了控制逻辑系统。

The earth point faults of direct current feed lines are localized with testing of leak current.

基于对地直流泄漏电流的检测来确定馈电支路的接地故障。

With the development of technology of electro electric, more and more HVDC systems are build in our country.

随着电力电子技术的发展，高压直流输电系统在我国的应用日趋广泛。

About design method, in this paper, it's particular introduced the machine part of the DC servo control system and control electro circuit's design process.

关于设计方法，在本篇论文中，详细地介绍了直流伺服控制系统机械部分的设计以及其控制电路的设计过程。

In this paper, a novel Crowbar control strategy is proposed to limit the over current in the rotor and the over voltage of the DC bus as well as the transient oscillation of the electromagnetic torque. Moreover, a capacitive current is injected into the grid to assist the recovery of the grid voltage.

文章提出了一种Crowbar控制策略，能有效抑制转子过电流、直流母线过电压以及电磁转矩的振荡，并可向电网注入无功电流以帮助电网电压的恢复。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。