查询词典 power frequency

An embodiment of the invention discloses a reverse power control method of an orthogonal frequency-division multiple access system including: calculating decision threshold values of each adjacent subdistrict according to the current reverse traffic channel gain of an access terminal, channel differences between each adjacent subdistrict and the resources distributed by the access terminal; and adjusting the reverse traffic channel gain value of the access terminal according to the decision threshold values of each adjacent subdistrict and using the adjusted reverse traffic channel gain values to determine the transmit power of the reverse traffic channel.

本发明实施例公开了一种正交频分复用多址系统中的反向功率控制方法，包括：根据接入终端的当前反向业务信道增益、各个相邻小区的信道差异以及接入终端所分配的资源情况计算各个相邻小区的判决门限值；根据所述各个相邻小区的判决门限值调整接入终端的反向业务信道增益值，并且利用所调整的反向业务信道增益值决定反向业务信道发射功率。

Variable speed constant frequency ; wind power generation system ; unit power factor

变速恒频；风力发电系统；单位功率因数

Our products include Voltage Stabilizer, EPS Intelligent Emergency Power Source, UPS , storage batteries, frequency inverter, soft starter, Charger, Power supply inverter, Transformer, circuit breaker, electric welding machine and others of more than 50 series, over 3000 types which.

主要生产的产品有稳压电源、EPS、UPS电源、蓄电池、变频器、软起动器、充电器、逆变器、变压器、断路器、建筑电气等五十多个系列，3000多个品种的电源产品。

A phase-shifted controlling PWM DC/DC full bridge converter with softswitching is proposed and used to realize a constant current power of20A(5～48V).This full bridge converter utilizes the transformer leakageinductance(or the resonant inductance in series with transformersprimary)and the autoecious capacitance of MOSFET to achieveZVS(Zero-Voltage-Switching),as a result it can decrease the switchingwaste,increase the switching frequency,and diminish the power bulk.

本文使用一种通过移相控制进行脉宽调制的软开关全桥变换器来实现20A(5～48V)恒流源，这种全桥变换器利用变压器的漏感、原边串联谐振电感和功率管的寄生电容来实现开关管的零电压开通，降低了开关损耗，提高了开关频率，减小了电源体积。

By using of the theory and simulation methods above, the inject cavity, buncher cavity and output cavity are analysed separably. With An annual electron beam of voltage 500kV, and current 3kA, average output microwave power 455MW and peak power 1.3GM is observed, bandwidth is 60MHz, the efficiency is 30.3%, the gain is about 36.8dB.and the frequency is 2.85GHz, The amplitude and phase of output microwave is stable.

最后运用上面所得出的一系列理论及模拟方法，分别对相对论速调管的注入腔、聚束腔和输出腔的工作特性进行了详细的分析和优化设计，我们采用3kA和500kV的环形强流相对论电子束，最后得到了工作频率为2.85GHz、饱和增益为36.8dB、效率为30.3％、带宽大约60MHz、平均功率为455MW，峰值功率可达1.3GW的微波输出的相对论速调管，输出微波的幅值平稳，相位稳定。

The content involves Digital Filter, Auto Correlation, Cross Correlation, mean and standard deviation, probability density and probability distribution statistic, as well as Auto Power Spectrum based on Fast Flourier Transfer, Correct Power Spectrum, Cestrum and Frequency Response. The Short-time Flourier Transfer and Wavelet Transfer are included in the analysis program.

具体内容包括：数字滤波、时域加窗、自相关计算与互相关处理、均值和方差计算、概率密度和概率分布统计，快速傅立叶变换基础上的自功率谱、互功率谱、频率响应函数、相关函数、倒频谱分析；基于短时傅立叶分析的联合时频分析、小波变换等。

This plan has been applied to GT4850 type switching power supply of 18-information-shift-frequency-power-supply-pannel and get expectable purpose.

实践证明，高功率因数加上软开关技术是改善开关电源功率因数并提高效率的有效方法。

Record data include generator voltage UG1,UG2, auto setting value UGREF,manual setting value IFREF, trigger angle ARF, active power P, reactive power Q, rotor voltage Ufd, field current Ifd, generator frequency F0, local cabinet output current ILA, other cabinet output current ILB.

记录的数据包括发电机电压UG1，UG2，自动给定值UGREF，手动给定值IFREF，触发角 ARF，有功功率P，无功功率Q，转子电压Ufd，励磁电流 Ifd，发电机频率F0，本柜输出电流ILA，它柜输出电流ILB。

matlab sps is used to build a simulink model of single-machine infinite-bus system, and based on the simulink model, simulation on effect of pss suppressing small disturbances low frequency oscillation is carried on, and some methods of improving power system transient stability are simulated, including avr and pss, short circuit cleared rapidly, fault current limiter and single-phase auto reclose. the study unifies the simulink model to realize matlab and vb seamless integration using the activex technology, and demonstrated the matlab simulation result with the vb contact surface. this method of matlab and vb integration can make up the matlab contact surface unfriendly flaw and offers a reference for the design for cai of power system analysis course.

运用matlab电力系统仿真模块集sps构建了单机—无穷大系统simulink模型，对电力系统稳定器抑制电力系统小扰动低频振荡的效果进行了仿真；对提高电力系统大扰动功角稳定性的措施，如自动电压调节器及电力系统稳定器、快速切除故障、故障限流器、自动重合闸等手段的使用效果进行了仿真验证；并结合单机—无穷大系统的simulink模型运用activex 技术实现sps与vb的无缝集成，将sps的仿真结果用vb界面显示，较好地弥补了matlab用户界面不友善的缺陷，为《电力系统分析》课程进行cai设计提供了思路。

The goal of this thesis is to use standard CMOS process to realize a 1.25Gb/s dual-loop data and clock recovery. To attain the aim of low power what we put emphasis on SOC, deep sub-micron CMOS technology is now being considered because of that advantages such as low power, highly integrated capacity. On the other hand, it does not require a frequency divider and we utilize demultiplexer to retime data.

本论文的主题在完成一个双回路的1.25Gb/s资料与时脉回复器，并且完全使用互补式金氧半制程来实现以达到低功率、高度整合的优点，为达到未来系统晶片强调的超低功率，我们更把时脉的频率降低且在不影响速度的前提下达到成效。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷