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While encapsulating RF MEMS switches in low vacuum diminishes the air damping and improves the switch speed and operation voltage, the performances of a switch is incident to being influenced by outside environment.

可见，RF MEMS开关用低真空封装可以减小空气阻尼、改善开关速度和执行电压的同时，开关的性能却容易受外界环境因素的影响。

This paper gives out the principles and improving schemes of transformer discharge equipment and resonance booster discharge equipment. By detecting the current in the main circuit, the gap's breaking-down can be identified, and the single chip micro-computer will send out corresponding control signal to make the IGBTs to switch off or cut off the input voltage, by this mean, we can make sure that every time of the experiment, the sample will discharge only once. The paper also introduces the principle of the protection circuit. At last, the experimental waveforms were listed, which prove the feasibility of the high voltage discharge fast switch-off device.

该文给出了变压器和谐振升压器2种高压放电试验装置的原理以及改进方案，通过检测主回路电流大小判断间隙是否被击穿，由单片机发出相应控制信号，采用IGBT等开关器件控制试验电压的通断，保证了试品每次试验只进行一次放电，介绍了保护电路的原理，给出了试验波形，证明了此高压放电速断装置的可行性。

The human does not leave, and in the activity, the switch continues the breakover; After the human leaves, the switch time delay automatic shut-off load, is bright the human to the lamp, the human extinguishes to the lamp, kind convenient, safe energy conservation.

人不离开且在活动，开关持续导通；人离开后，开关延时自动关闭负载，人到灯亮，人离灯熄，亲切方便，安全节能。

In this paper the commutate circuit principle and work process of the commutate circuit, the composing and work principle of frequency conversion circuit, main switch element IGBT structure feature turn on and turn-off process dynamic and static switch feature and the work principle of invert were analyzed .

本论文分析了整流电路及相控电路的原理和工作过程；变频电路的组成和工作原理；主开关器件IGBT的结构特点、导通及关断过程、动态静态开关特性；逆变电路的工作原理。

In order to solve the application problem of conduction heating machining, this project investigates some problems, such as dynamic characteristics of heating power, features of circuit current and voltage, arc discharge states and so on. It also studies control characteristics of Uni-phase or Tri-phase Direct Current Power Supply and Inverse Switch Power Supply. A High Frequency Inverse Switch Commutate Power Supply is developed.

为了解决导电加热切削的应用问题，从加热电源的动态性能和回路的电流、电压特性及电弧放电状态等方面进行研究，分析比较了单、三相交直流电源和逆变开关电源的特点和控制特性，研制了高频逆变开关整流电源。

BSIT compound device is developed. This device consisting of BSIT and BJT has many advantages, such as high switch speed, large power capacity and high h+ temperature stability. It can be used in low voltage switch regulator, pulse power source, instrument enduring a bad environment, and so on.

本文研制了BSIT组合器件，它是由BSIT和BJT组合而成的一种复合器件，具有开关速度高、功率容量大、h_的温度稳定性好等优点，可用于低压开关电源、优质脉冲功率源和高低温恶劣环境下的仪表等场合。

In this paper, the existing production vehicle braking and acceleration systems to illustrate principles and analysis, Pointed out that it occurs in the course of the problem, With related technologies as the prerequisite, The use of hinged connections, solenoid valve motion, sensor detection, ECU control methods, Made false step on the accelerator pedal to switch the system concept, Emergency brake foot wrong lane when the accelerator pedal will speed up the system to switch into the brake system of the idea, Belongs to the field of automotive active safety technology.

摘 要：本文主要对现有量产汽车制动及加速系统原理加以说明与分析，提出其在使用过程中出现的问题，再以相关技术为前提，运用铰接连接、电磁阀动作、传感器检测，ECU控制等方法，提出误踩加速踏板切换系统构想，即紧急制动误踩加速踏板时将加速系统切换成制动系统的想法，属于汽车主动安全技术的领域。

This device use the principle of additional DC power supply in main feeding switch, and use the principle of direction of zero sequence power in branch feeding switch.

该装置在总馈电开关处的漏电保护装置使用附加直流电源原理，在分支馈电开关处的漏电保护装置使用零序功率方向式保护原理。

In High-avail, made a concept of Redundancy Manager, and put forward some ethernet ring structures on the base of it. We can find these meet different levels of Avail requirement. In Real-time, it made great improvement on traditional ethernet. Adopted switch technology, high-speed ethernet, full-Duplex port switch, data prioritisation, and VLAN technology.

在高可靠性方面，提出了冗余管理器的概念，在它的基础上形成的几种以太网环网结构，可以满足不同层次的可靠性要求；在实时性方面，对传统以太网加以改进，采用了交换技术、高速以太网技术、全双工端口交换的方式、优先级标志技术、虚拟网技术等新技术。

It performances meet IEC420《AC H.V. Load Switch with Fuse》(1990 Edition)and GB3804 《3-63kv AC H.V.Load Switch》after strict test and long-time operating. Compared to the product of the kind in the foreign country,its technical parameter has reached the international level with the features of small volume and light weight. Can be used widely in 12kv distribution network to protect the equipment against working without phase.

该产品经全面型式试验和长期和试运行考核，性能达到EC420《交流高压负荷开关一熔断器组合电器》（1990版）和GB3804《3-63kv交流高压负荷开关》标准要求，与国外同类产品比较，技术参数已达到同类产品水平，具有体积小，重量轻，可用于环网柜和箱式变电站，广泛应用于12kv线路的电能分配，并有效地避免了设备的缺相运行。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了