动电

On ultra precision lathe, author propose the principle of error in-process measurement and compensation of cylinder, end and contour, and use adjusted straightedge and sensor to build error on-line measurement and compensation control system of end turning.

研究了基于模糊数和插值原理的模糊控制算法，并用该算法实现了压电陶瓷微动刀架伺服系统的闭环控制，使其控制精度达到了±0.01μm；在超精密车床上，提出了圆柱面、端面和轮廓加工的误差在线测量与补偿原理，并利用标定的直尺和传感器建立了端面车削误差在线测量和补偿控制系统。

It can fulfill automatic control on swash plate of

它通过对发动机转速信号、大气总温信号的处理，解算出斜板的理论位置，与斜板的位置传感器信号进行比较，其差值作为控制信号经放大后控制电液伺服阀带动作动筒，使斜板向减小差值的方向运动，从而实现对飞机进气道斜板的自动控制。在这一系统中

The structure beam response control method based on the traveling wave model was discussed theoretically. The theoretical traveling wave model was applied to a long thin beam with piezocrystal actuators and the traveling wave active control law for the condition of making measurement upstream and performing control downstream was derived and the control compensator formula of the flexural waveguide in the form of transcendental function was deduced.

从理论上探讨了基于行波模型的结构梁响应控制方法，在梁及压电陶瓷作动器处采用行波理论模型，导出了上游测量、下游点施加控制的行波主动控制律及相应的具有超越函数形式的控制补偿器表达式。

The general platform structure of hardware and software of the SCS-500E security and stability control system is introduced.Some techniques,such as,the characteristics of SCS-500E—high-speed communication based on FPGA,criterion of non-fault line tripping based on local electrical measurement...

介绍了该平台的系统构架、硬件组成和软件结构；对其基于现场可编程门阵列的高速同步串行通信和基于本地电气量的无故障跳闸新判据及定值映射管理等特点做了阐述；对SCS-500E安全稳定控制平台针对国家特高压线路示范试验工程进行的动模试验和数字仿真试验进行了说明；还介绍了该平台的工程应用情况。

Aiming at T-base diamond lathe, author use both on-line and off-line to measure the error vector of lathe workspace, and acquire good network train samples, then build two-dimensional error compensation model of lathe workspace with BP neural network and fuzzy neural network, at last build contour error compensation control system.

在分析国内外数控机床伺服闭环系统的发展现状及局限性的基础上，利用原数控系统和所研制的二维压电陶瓷微动刀架，研制了独立于原数控系统的超精密闭环控制系统。

The main principle of the DCcontactor:The electromagnetism coil switches on electricity thetitle iron to match with the iron heart on,the suction of theelectromagnetism system overcomes the counterforce of the springarouses the action of the contact, the main electric circuitconnected;The electromagnetism coil cuts the power the counterforceof the spring arouses the title iron from move to open, the headcontact breaks to open the output electricity arc give or get anelectric shock in drive to arc-extinct-chamber and made longer,thestrong cooling dissociates and put out,the main electric circuitcuts off.

接触器的主要原理：电磁线圈通电，衔铁和铁心吸合，电磁系统的吸力克服弹簧的反作用力带动动触头与静触头接触，主电路接通；电磁线圈断电，弹簧的反作用力带动衔铁和动触头弹开，触头断开产生的电弧在灭弧室中受到磁吹灭弧和电动力驱动被拉长，并强烈冷却去游离而熄灭，主电路切断。

It was found that the prepared materials have good dynamic performances and did not delaminate in the process.

主要内容和结果包括： 1、在气体炮上用平头弹和尖头弹对电沉积镍涂层钢带进行冲击动载试验。

Company has strong technical strength, product development, machining, testing tools are in the leading level, and its independent research and development of the "CMS-6000 General Spline wear test bed" and "PNW-25000 Performance Test Drive Units reverse" filled the gap, MTS company and the United States, the United States Instron Corporation, Germany Doli companies jointly developed static and dynamic electro-hydraulic servo testing machine technical level has reached world advanced level.

公司技术力量雄厚，产品研发、机械加工、检测手段均处于领先水平，其自主研制开发的&CMS-6000花键磨损综合试验台&和&PNW-25000传动扭转性能试验台&填补了国内空白，与美国MTS公司、美国Instron公司、德国DOLI公司等合作开发的电液伺服动静态试验机技术水平已达到世界先进水平。

Overhead lines of different voltage classes and extension space are arranged by adopting the mode of combining many line-type angle-type gantries with various heights and angles.

为保证供电的可靠性，结合相关设计规范，采用35kV双母线固定式高压开关柜完成配电及馈电环节，选用国内最先进的4分支微机差动保护装置来实现110kV变压器主保护。

Results Microinjection of L-glutamate into lateral habenula decreased wake time ; while increased REM sleep time.

结果 用L-谷氨酸兴奋LHb时，觉醒减少，快眼动睡眠增加；而电损毁LHb时，觉醒增加，REM睡眠减少。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。