时间频率标准（time and frequency standard）时间与频率互成倒数关系，频率标准可从时间标准导出，所以统称时间频率标准。
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.
时间序列分析和统计检验提供了优化地下水位监测频率的定量标准。
Time series analysis and statistical test provide quantitative criteria to determine the optimum observation frequency.
该系统采用8031单片机进行控制，根据控制命令可发出不同时间间隔、不同时间长度、不同频率的标准正弦波信号。
The system is controlled by chip microprocessor 8031 and can transmit standard sinusoidal waves with various frequencies and arbitrary time intervals according to various requirements.
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