instantaneous amplitude meaning in English

瞬时振幅

Automatic classification of digital modulated types based on the combination of instantaneous amplitude and wavelet transform
基于瞬时幅度与小波分析相结合的数字调制制式的自动识别
In order to reflect the characteristics of amplitude increase and frequency changing of seismic signal , a new automatic recognition method of seismic phase is developed based on the instantaneous amplitude and instantaneous frequency
摘要为了充分反映地震信号振幅增大和频率改变的特征，发展了一种以振幅和瞬时频率比乘积为特征参量的震相自动识别方法。
Then , the hilbert transform is applied to each modal response to obtain the instantaneous amplitude and phase angle time histories . a linear least - square fit procedure is proposed to identify the natural frequency , damping ratios , physical mass , damping and stiffness matrices from instantaneous amplitude and phase angle for each modal response
然后对各阶模态响应进行hilbert变换，得到瞬态幅值和相位角的时间历程，再运用线性最小均方拟合来识别自然频率、阻尼比、质量、刚度和阻尼矩阵。