Time-frequency distribution series based on wavelet transform is discussed., and a new time-frequency tool: frequency-shear distribution is introduced into radar imaging fields.
讨论了基于小波变换的时频分布级数，把一种新的时频分析工具——频率-切变分布应用于时频成像。
The shear spring bears most of the vertical loading, which decreases the vibration frequency.
剪切弹簧承担大部分垂直方向的载荷，降低震动频率。
Objective To study the effect of enhanced external counterpulsation (EECP) on frequency components of shear stress in myocardial ischemia condition.
目的研究体外反搏治疗心肌缺血时血管对剪切应力各频率分量的影响。
应用推荐