1) time-frequency division
分时分频
2) different PRF with respect to each interval of scanning time
分时分重频
1.
Aimed at the clutter overlap of PD system applied to the ground-based low altitude radar,a designing method of a different PRF with respect to each interval of scanning time was proposed.
针对地面低空雷达应用PD体制的杂波重叠问题,提出了分时分重频的设计方法。
3) time-frequency distribution
时-频分布
1.
Preliminary analysis of time-frequency distribution of transient evoked otoacoustic emission in normal hearing human subjects;
正常人耳瞬态诱发耳声发射的时-频分布初步分析
2.
Thus, the standard time-frequency distribution images of all fault conditions including the gap abrasion in-formation of the main bearing can be defined.
通过该方法,可以得到含有内燃机主轴承间隙磨损状态的时频信息,定义出各个标准故障状态的时-频分布图,建立了基于图像匹配技术的内燃机主轴承磨损故障诊断模型。
4) time and frequency analysis
时频分析
1.
The study of time and frequency analysis,feature extraction,source locating and denoising of the original signal is described in detail.
在综合描述复合材料声发射信号特征和小波变换基本原理的基础上,本文总结了小波变换在声发射信号分析中的研究进展,并重点描述小波变换对复合材料破坏过程中声发射信号的特征提取、时频分析和信号除噪及声源定位方面的研究,提出了小波变换在声发射信号分析应用中需要进一步解决的问题。
5) time-frequency analysis
时频分析
1.
Comparison between time-frequency analysis methods of yarn signal;
纱线信号时频分析方法比较
2.
Dynamic signals' time-frequency analysis of resistance spot welding process;
电阻点焊过程动态信号的时频分析
3.
Study on time-frequency analysis for acousto-ultrasonic testing signal in thin plates;
薄板声——超声检测信号的时频分析研究
6) time frequency analysis
时频分析
1.
Hilbert-Huang transform and time frequency analysis of magnetotelluric signal
Hilbert-Huang变换与大地电磁信号的时频分析
2.
Then we process the real data in the method of the time frequency analysis.
时频分析是近年发展起来的一个重要的、新的数学分支 ,目前已成为国际上极为活跃的研究领域。
3.
This can satisfy well time frequency analysis of multi graduation characteristic signal.
时频分析方法是利用小波变换原理 ,从地震波的时间域和频率域同时对其作出分析。
补充资料：分频
将较高频率变为其整数分之一低频率的方法。早期采用混频法，后又采用张弛振荡与被分频率同步法，还可用锁相法。在高频技术中，可用隧道二极管分频。常用二进制触发器分频法，利用反馈可实现任意分数的分频。分频所得信号可保留原信号的稳定度。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条