查询词典 power frequency

CFEL's were compared with other similar devices such as cyclotron autoresonance masers and free-electron lasers in detail, which can also be operated in this portion of the spectrum. In the fourth chapter, a limitation was shown to be imposed on the power capacity and power output of a CFEL device at high frequency operation.

第四章分析了工作频率升高时契伦柯夫自由电子激光功率容量和输出功率受到的限制；为了解决这个问题，提出了多电子束契伦柯夫自由电子激光的概念并进行了理论研究。

ABSTRACT Power MOSFET and MOS controlled thyristor play a growing important role in the field of high frequency power electronics.

功率MOSFET和MOS控制的晶闸管在高频电力电子技术领域越来越发挥着重大的作用。

Three kindof high power high speed varying-frequency stirrers are developed. Thiskind of series stirrers have many specialties: high power, small volume,low noise, wide range speed regulation, fast dynamic response, highefficiency, free maintenance, easy and convenient operation and so on.The stirrers have been used in the test laboratory of Technical Centerof China Oilfield Services Limited and other companies. This has made goodsocial and economic benefits.

该系列大功率变频高速搅拌机具有功率大、体积小、噪声低、调速范围宽、动态响应快、运行效率高、免维护、操作简单方便等特点，并在中海油田服务股份有限公司、中石化西北分公司轮台基地实验室、中石油石油勘探开发科学研究院油化所等单位的实验室得到了现场应用，取得了很好的社会和经济效益。

The SA9904B,produced by SAMES company, is a three phase bi-directional energy/power chip and completes the measurement of RMS voltage , RMS current, powe, energy , power factor and frequency as the kernel of detecting unit.

本系统采用SAMES公司的三相双向电能／功率芯片SA9904B作为测量单元的核心来完成电压、电流、功率、电能、功率因数和频率的测量。

Double-frequency three-phase bridge converter in three phase power factor correction, three-phase active power filter are studied theoretically and experimentally.

本部分研究内容提出的双频变换器理论，申请人和导师合作分别于2006、2005年申请成功国家自然科学基金项目&高效率高性能双频变换器理论及其控制&(50677071)、教育部博士点基金项目&双频变换器理论及其应用&(200611012)和重庆市自然科学重点基金项目&新型高效电能变换技术理论及控制研究&(2005BA6017)，发表相关论文9篇。

With the successful experiences in the coal-fired power plant, High-frequency Electrostatic-Fabric integrated dedusting technology has been proved to meet the requirements of energy saving and emission reduction under the poor condition of flue gas in the coal-fired power plant.

本文阐述了高频电袋复合除尘器技术的集成创新，结合在燃煤电站锅炉配套中的成功实践，满足了当前燃煤电站烟气条件差、排放要求高状况下的节能减排需求，此技术拥有常规单一除尘技术所没有的高效、节能优势，填补了国内空白，为今后燃煤电站粉尘治理提供了借鉴。

So it is capable to satisfy the requirements both UV intensity and conversion efficiency by using lower voltage or input power and high frequency in the case of matching between discharge tube and power supply.

不对称电压波形的负高压脉冲要比正高压脉冲向放电管中馈入更多的能量并产生更强的紫外辐射，但密集的丝状放电间相互作用使发光的能量转换效率低于交流电压源。

High-power rectifier devices can work efficiently to high frequency alternating current into direct current, in the'60s and'70s, Thyristor power rectifier tube and to the development and application of great development.

大功率硅整流器能够高效率地把工频交流电转变为直流电，因此在六十年代和七十年代，大功率硅整流管和晶闸管的开发与应用得以很大发展。

What's more, the company has many years of experience in the aspects of power MOSFET, radio frequency tube and driving power module, and it breaks through the international monopoly to apply its products in several fields, including IT, digital, communications, illumination, security, and automotive electronics, etc.

SMD封装事业部在国家民营企业中，率先引进美、日等国的半导体封装设备，生产半导体分立器件和被动元件，已拥有全自动生产线28条，年产SMD（二极管、三极管、集成电路、电容器）等无铅无卤环保产品50多亿只，特别在功率场效应管和射频以及驱动电源模块方面，集多年的技术经验，突破国际垄断，产品广泛应用于IT、数码、通讯、照明、消费类汽车电子等领域。

By means of analyzing the variation of operation parameters of Shanxi power grid such as voltage and frequency, the possible affects of fault trip of 1000kV transmission line on Shanxi power grid are summarized; and according to concrete situation of 1000kV transmission line, some corresponding control measures are put forward.

研究了1 000 kV线路故障跳闸后山西电网的运行情况，通过对山西电网的电压、频率等电气量变化情况的分析，总结出1 000 kV线路故障跳闸对山西电网可能造成的影响，并结合1 000 kV线路的具体情况，提出了有针对性的控制措施。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。