Three characteristics that discribe a sinusoidal signal are the frequency , amplitude , and initial angle 表示正弦量的三个要素为频率、幅值（大小）和初相角。
The fpscs increased in the amplitude with the growth of dendritic arborization but decreased in the number of peaks 随着树突分支的发育，此fpscs的幅值增加而峰数减少。
Relation equations among the parameters of tracking - differentiator and the amplitude and frequency of its input - output signals 跟踪微分器参数与输入输出信号幅值频率关系
According to computer calculating , we can obtain the harmonics amplitude of the stator coil of excitation machine 通过计算，可得到励磁绕组中感应电势的各次谐波幅值。
The coder , a unit that converts amplitude values to a set of pulses , is very important to digital transmission 编码器是将采样幅值转换成一组脉冲的单元，它对数字传输是非常重要的。
Factors influencing power quality vary from the electric pulse in millisecond to long term voltage fluctuation 电能质量干扰的变化范围很广，从毫秒级的冲击干扰到长期的电压幅值波动。
The essential reason of influence of stress amplitudes and waveforms on rock life was different dissipation of energy 结果表明，应力幅值、波形和频率都对岩石的疲劳寿命有显著的影响。
It was emphasized that the fatigue life of rock sample was influenced by stress amplitudes , waveforms and frequencies 重点分析了应力幅值、波形、频率等因素对岩石疲劳破坏寿命的影响规律。
Otherwise , the amplitude would decrease ; to the thinness testing the amplitude would decrease when the thinness became thick 而对于单板厚度检测，则是随着板厚的增加，感应电压幅值减小。
And the essential reason of influence of different frequencies on rock life was different rate of loading 幅值和波形影响的实质是能量耗散的不同，而频率影响疲劳寿命的实质在于加载速率的不同。
