1) frequency multiplex
频率分工
2) frequency division multiplex
频率分隔多工
3) FDD Frequency Division Duplex
频率分开的双工操作，频分双工
4) power frequency table
工频频率表
1.
The passage illustrates the uncertainty measurement approaches used by domestic measurement, scientific research and producing departments, and analyzes the uncertainty of calibrating indication errors of power frequency table.
阐述了国内计量、科研、生产等部门所使用的工频频率表的测量不确定度评定方法,并对工频频率表校准示值误差测量不确定度进行了分析。
5) working frequency
工作频率
1.
The dead oil NMR relaxation times are measured with two working frequency (2 MHz and 23 MHz) NMR spectrometers in this paper.
利用两种工作频率(2MHz和23MHz)的NMR谱分析仪器测量了不同粘度原油样品的NMR弛豫时间。
2.
With the study of the current methods of route multi identify in expressway,the problem of how to choose the working frequency in route identify system with RFID is researched.
结合高速公路多义性路径识别问题研究的实际情况,对采用RFID解决路径识别问题中工作频率的选择进行多方面的分析和探讨,通过分析不同频段的使用情况、现有技术的成熟度、各个频段产品现状及应用成本问题,对每个频段当前的可选择性进行比较分析,可为使用RFID解决路径识别问题中工作频率的选择提供思路。
3.
The results show that noise spectrum of ultrasonic cleaner has a broadband and contains largely high frequency components,and its basic frequency depends on the working frequency of ultrasonic cleaner.
结果表明,超声波清洗机的噪声频带较宽且以高频噪声为主,主频位于工作频率处。
6) operation frequency
工作频率
1.
In order to design high performance and reliability linear refrigerator compressors,the factors influencing the natural frequency of the linear compressor were analyzed theoretically,and experimental study on operating characteristics of different discharge pressure and operation frequency were conducted.
为了开发高性能、高可靠性的直线冰箱压缩机,从理论上分析了影响直线压缩机固有频率的因素,通过实验研究了直线压缩机在不同排气压力和工作频率下的工作特性。
2.
In order to increase the operation frequency of a pulse detonation rocket engine(PDRE),a PDRE model with solenoid valve was designed whose diameter and length was 30 mm and 1 000 mm respectively.
为了提高脉冲爆震火箭发动机的工作频率,设计了一台内径30 mm,长度1 000 mm的电磁阀式脉冲爆震火箭发动机模型。
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条