方位频率图 azimuth frequency diagram ; azimuth frequency plot ; AZF ; AFD
相位频率 phase frequency
对数相位频率特性 logarithmic phasefrequency characteristic
中位频率 median frequency ; MF ; mean frequency ; middle frequency
方位频率响应特性 directional frequency response characteristic
水位频率曲线 stagefrequency curve ; water-level frequency curve
相位频率侦测器 Phase Frequency Detector
相位频率畸变 phase frequency distortion
相位频率响应特性 phase response characteristic
The overall thinking of program-controlled signal generator’s design is described in the paper. The hardware circuit design is made up of keyboard-controlled circuit, frequency-displayed circuit and the hardware design loading 40-bit frequency /phase word from AT89S52 to AD9851.
论文中阐述了程控信号源电路设计的总体思路,提出了键盘控制电路、频率显示电路和AT89S52对AD9851的40位频率/相位控制字输送的硬件设计,对键盘电路控制过程和频率电路显示过程中的数据传输过程进行了具体的描述。
参考来源 - 基于DDS技术的程控信号源设计·2,447,543篇论文数据，部分数据来源于NoteExpress
对于力量与体重、肌电图的峰值、起始时间、峰值时间、中位频率、平均功率、和频段均进行标准化描述后进行统计计算。
The descriptive statistics for body weight normalized strength, normalized peak EMG, time to onset, time to peak, median frequency, mean power frequency, and frequency bands were calculated.
这过程中，两位天文学家发现了某一特定频率的嘶音，恰好证明了当时争议不断的大爆炸理论。
The hiss they found at one particular frequency turned out to be evidence for the then-controversial idea that the universe had been born in a Big Bang.
这是风吹过灌木或者一位观众窃窃私语所发出声音频率的上限，通常就是因为这些声音会将表演者的声音淹没。
That is the usual upper limit of the noise of wind rustling through bushes and of the murmurs of an audience, which might have drowned the actors out.
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