数字式，指一种信号。该信号在一定的时间内，振幅保持不变。通常由一系列的高低脉冲表示。
Digital, Digital refers to a signal whose amplitude remains constant for a finite period of time. Digital signals are commonly represented as a series of high and low pulses.
这种干扰波在地震记录的整个时间段上具有很强的能量，并且其频率、相位和振幅可认为基本保持不变。
The interference wave has strong energy over whole time period of seismic records, and its frequency, phase and amplitude can be basically considered to maintain invariable.
同时，单电子三极管I-V曲线的振幅随着隧道结电容的增大而减小，但I-V曲线的周期保持不变。
If the tunnel junction capacitance becomes larger, the amplitude of the I-V curve of single-electron transistor becomes smaller, but the period is unchanged.
在其它参数保持不变的情况下，得出细晶粒多晶体金属的平均疲劳寿命随晶粒尺寸和应力振幅的增加而减小的结论。
The fatigue life is seen to depend on the grain size and stress amplitude, based on the nonequilibrium statistical theory of fatigue fracture and the model of interface energy.
若相位变化，而振幅几乎不变，井水位潮汐响应满足过渡状态。
If the phase change, while the amplitude is almost constant, tidal water level response to meet the transition state.
在试运行过程中，振幅和电流除随电压波动而变化外应该是稳定不变的。
In tries to move in the process, the oscillation amplitude and the electric current besides change along with the voltage undulation should be stable invariable.
幅度调制是用调制信号去控制载波的振幅，使其随调制信号线性变化，而保持载波的频率不变。
Amplitude modulation is to control the amplitude of signal carrier and make it change linearly with modulation signals and maintain its frequency.
提出了振幅位相合成圆谐滤波器用于旋转不变模式识别。
The rotation invariant amplitude phase composite circular harmonic filter (CHF) is proposed.
分析了该技术测量样品纵深结构时图像的形成机理，结果表明它相当于一复振幅线性平移不变系统，从而可用相干传递函数描述系统性能。
It has been proved that the OCT system behaves as a linear shift invariance system and can be described precisely by a coherent transfer function (CTF).
研究了匹配网络参数不变时，射频电源不同调制模式对反射率的影响。实验研究表明，脉冲宽度调制模式的稳定度要明显高于振幅调制模式。
When the network parameters are kept constant, the results show that the variation of reflection efficiency for PWM mode according to injection power is much less than the am mode's.
首先对人脸图像进行傅里叶变换，得到其具有位移不变特性的振幅谱表征。
First, face images are processed by a 2D Fourier transform that has some effective properties such as a linear transform, and is invariant against spatial translation.
首先对人脸图像进行傅里叶变换，得到其具有位移不变特性的振幅谱表征。
First, face images are processed by a 2D Fourier transform that has some effective properties such as a linear transform, and is invariant against spatial translation.
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