查询词典 power frequency

The generators are three-phase,four-wire type, adopting star connection with neutral point. The rated line voltage is 400V,phase voltage 230V,frequency 50Hz,power factor 0.8. We can provide 60Hz and the other voltage's generator according to the customer's request.

发电机为三相四线制，采用带有中性的星形接法，额定电压为400V，相电压为230V，频率为50HZ，功率因素0.8，根据客户要求，我们也可提供60HZ及其电压的发电机。

The generators are of three-phase four-wire type,making use of star connection with neutral point.The rated line voltage is 400V.phase voltage 230V.frequency 50Hz,power factor 0.8.It can provide 60Hz and the other voltage's generator according to necessary.

本发电机为三相四线制，采用带有中性点的星接法，额定电压为400伏，相电压为230伏，频率50赫，功率因素0.8根据用户需要，也可提供60赫及其它电压值的发电机。

Road irregularity, as a stationary stochastic process, is generally illustrated by the power spectral density in frequency domain.

作为随机过程的车辆道路不平度高程，通用的模拟方法是频域模型－道路不平度功率谱密度。

Frequency AC-DC rectifier first, and then the inverter for AC 50 Hz, the step-up transformer into the local electricity company 11 kV power grid.

变频交流电先整流成直流电，然后逆变为50Hz的交流电，经升压变压器送入当地电力公司的11kV电网。

In multipath frequency selective fading channels the bits could be adaptively allocated in the subchannels according to the subchannel gains to minimize the total transmission power for a given bit error rate .

OFDM在多径传播通过的频率选择性无线信道时，根据子信道的增益对子信道传输的比特数自适应分配，可以在满足特定比特误码率的前提下使整体传输功率达到最小。

The subharmonic heterodyne combined with cut-off waveguide method is proposed to measure the frequency of 0.14THz high-power nanosecond pulse in this paper.

本文提出了采用截止波导法与谐波混频法相结合的方法，进行0.14THz高功率短脉冲的频率测量。

The invention discloses a method for dynamic channel allocation in TDD-CDMA mobile communication system. Based on the distance between mobile station and subzone base station BS, mobile stations MS are classified. Code tract in same group of code track (carrier frequency + time slot) is allocated to the mobile station with nearer distance. MS with different distances have different requirements of emission power. Whether crossed time slot code track group can be used or not, and use of group of code track with what kind of multiplexing factor need to be determined.

本发明公开了一种TDD－CDMA移动通信系统的动态信道分配方法，是将移动台MS按照与本小区基站BS的距离进行分类，同一个码道组中的码道分配给距离相近的移动台MS；同时不同距离的MS对发射功率的要求不同，对相邻小区的干扰也不同，系统根据MS对发射功率的要求，确定其是否可以使用交叉时隙码道组和使用哪种复用因子的码道组。

We superpose a voltage with high frequency but low amplitude on the shielding layer of power cables to make the loss current more obvious.

研究方法：建立了水树精确数字仿真模型，提出一种新的在线绝缘诊断方法：高频信号叠加法。

Product features: 1, automatic satellite system power automatically begin searching and tracking satellites; 2, Express to capture the use of WRS algorithm for finding stars at Express looking for about 15 seconds to track satellites; 3, receive real-time tracking of satellite signals, high-speed DVB identification code in order to achieve continuous flow of radio and television programs to watch; 4, automatic identification in the frequency and be able to accurately identify the location on the target satellite; 5, scanning electron velocity EBF sweep mode to ensure that the system 100 times per second tracking sweep speed, so that the antenna system to ensure that the system at all under any uninterrupted for watching satellite television programs and allowing the system to greatly increase the service life; 6, self-diagnosis can be their own fault diagnostic equipment, including communication links, sensors, drives, etc..

产品功能：1，自动寻星系统通电后自动开始搜索跟踪卫星；2，快速捕捉利用WRS寻星算法在15 秒左右快速寻找到跟踪卫星；3，接收信号实时跟踪卫星，高速识别DVB 码流以实现连续收看广播电视节目；4，自动识别能够在频率和位置上准确的辨别目标卫星；5，电子波速扫描 EBF扫模式保证了系统每秒100次的跟踪扫速度，使天线系统保证系统在任何条下都能不间断的收看卫星电视节目且使系统的使用寿命大大增加；6，自我诊断可以自行诊断设备故障，包括通信链路、传感器、驱动装置等。

At the same time the power follow control strategy restricts the switch frequency and fluctuation of engine working point in the appropriate range .

这种控制策略同时还对发动机的开关次数以及工作点的动态波动等不利于发动机提高燃油经济性和降低排放的情况进行限制。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。