查询词典 power frequency

Remote control of frequency, voltage, real power, and power factor

远程控制频率，电压，真正的权力，和功率因数

According to the resonance mechanism, power disturbance of prime mover can arouse power system forced low frequency oscillations.

文中根据汽轮机功率扰动引起电力系统低频振荡的共振机理，研究了汽轮机功率变化的原因。

The model of the received power is established based on the basic principles of geometry optics and radiometry. This model provides the principle of receiver-transmitter design and performance evaluation. On the basis of the received power model and APD noise model, the response of measurement signal after passed through the frequency difference circuit and the corresponding change of its SNR are studied.

研究了非合作目标测距时，发射视场与接收视场的重叠情况，以及视场重叠区域内光的探测情况，并以此为基础，根据几何光学和光度学的基本理论，建立了非合作目标测距中接收光功率的数学模型，为接收/发射器的结构设计，以及测距性能的预测提供了理论依据。

In a linera circuit,the reactive power is defined as the ac component of the instantaneous power,with a frequency equal to 100/120 Hz in a 50 or 60 Hz system.

在一个 linera 线路，那反动的力量是定义当做即时力量的 ac 成份，与频率相等的至一个第 50 或第 60 赫兹系统的 100/120个赫兹。

During the testing process, the circuit use the on-off power supply's pull and push structure as prototype, gaining a additional LC in series resonance circuit, which is also a opposite sharp structure. In the same frequency,and in the work state of work voltage, receiving even more high efficiency and output power.

该电路在实验过程中以开关电源推挽式结构为原型，改进得到一个附加了LC串联谐振回路的反激式结构，在同等工作频率、工作电压的状态下，得到了比推挽式结构更高的效率和输出功率。

After analyzing the reason of high energy consumption in desulfurization system, which belongs to Datang Huayin Zhuzhou power generation company, we have raised the following transformations: First, in order to improve the density of serous fluid and efficiency of pulping, install the frequency-converter to the recycle pump of ball mill; The second, in order to monitor the parameters real time and long time, change the installation location of densitometer and PH meter in the absorption tower; The third, in order to decrease the station service power consumption rate, change the booster fan according to model; Last,through optimizing the mode of operation desulfurization serous fluid recycle pump, and make good use of PH meter in absorption tower, we have got achievement that increasing desulfurization efficiency and decreasing the desulfurization consumption rate.

针对大唐华银株洲火力发电公司脱硫系统运行能耗高的现状进行分析研究，提出对球磨机循环泵变频改造，提高制浆密度，提高制浆效率；对吸收塔密度计和PH计移位改造，便于对参数长期实时稳定监视；对进行换型改造，降低厂用电率；通过优化脱硫浆液循环泵运行方式，脱硫塔运行PH值等手段，达到提高脱硫效率，降低脱硫厂用电率的效果。

Its fluctuation property is qualitatively characterized by the power spectral density and integral spectral density,and it is concluded that the ratio of high frequency phase noise increases with the increase of pump power.

利用功率谱、积分谱对具体泵浦条件下的相位噪声特性进行定性分析，结果表明，泵浦功率越大，高频成分占的比例越大。

The main products cover: high-frequency switching power supply transformer; communications power supply, signal transformer (CO interfaces, dial-up, ADSL, ISDN, etc.); linear transformer; AC-DC/AC converter; transformer; step-up transformer (backlight source, etc.); voice signal separator; Filters: magnetic coil; inductor and other magnetic devices.

主要产品含括：高频开关电源变压器；通讯电源、信号变压器（局端介面、拨号、ADSL、ISDN等）；线性变压器；AC-DC/AC转换器；互感器；升压变压器；语音信号分离器；滤波器：磁环线圈；电感器等磁性器件。

The theoretical analysis and simulation results of 1kW 40~60VDC/380VDC full-bridge Boost mode two-input DC-DC converter have shown that the converter has the advantages such as double isolation among multiple input sources and between output and input of the converter, simple topology, strong voltage matching ability, multiple input sources can supply the power simultaneously or individually, small input current ripple, high power density, high conversion efficiency, high reliability at short circuit, magnetic flux of high-frequency transformer easy to add up etc.

1kW 40～60VDC/380VDC全桥Boost型双输入直流变换器的理论分析和仿真结果表明，这种变换器具有多路输入源之间以及输出与输入源之间双隔离、电路拓扑简洁、电压匹配能力强、多路输入源可同时或分时供电、输入电流纹波小、功率密度高、变换效率高、负载短路时可靠性高、高频变压器磁通易于叠加等优点。

It is equipped with several sets of diesel generators and frequency conversion generators, power station control system and subsidiary facilities, which is used to supply power for fieldwork.

车内装有多台柴油发电机组和变频发电机组，以及电站控制系统、电站辅助设施，为野外作业时提供电源。

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