1) time-frequency graph
时频图
1.
The one channel seismic recording after S-transforming,since the frequency differences existed between the seismic signals before and after first break onset have caused obvious energy accumulation on time-frequency graph.
S变换后的单道地震记录,因其地震信号在初至起跳前后存在明显的频率差异,致使时频图上有明显的能量聚集。
2) time-frequency picture
时-频图
1.
After the signals in the hopping range pass through the process of numeric channel and then the process of the most correlation, the distribution of the FH signals in the time-frequency picture becomes very clear.
在对跳带内的信号进行数字信道化处理后,再经过最大相关处理,时-频图上的跳频信号的分布情况将会变得非常清晰;时间相关统计法是充分利用跳频信号在时间上的断续性和每跳间的连续性来识别跳频信号。
3) joint time-frequency spectrum
时频谱图
1.
In this paper,according to the characteristic of seismic signal s noise,one estimation method of seismic signal s first arrival based on triple correlation of joint time-frequency spectrum is introduced,and the results of experiment and conclusion are presented.
本文通过对地震信号噪声特性的分析,研究了基于联合时频谱图三重相关的地震信号初至的估计方法,并给出了实验结果和结论。
5) time-frequency contour map
时频等高图
1.
Using time-frequency contour map to detect the time when fault happened and using wavelet packet characteristic entropy vector to diagnose the degree that rubbing reached,an integral wavelet analysis method of diagno.
介绍了小波分析方法在振动故障诊断中的应用,利用时频等高图确定汽轮机碰磨故障发生的时刻,借助小波包特征熵向量诊断碰磨故障的严重程度,从而提出了完整的汽轮机碰磨故障的小波分析诊断方法。
2.
The transform results were plotted in time-frequency contour map.
分析表明,利用小波时频等高图,可以直观表示信号中畸变发生的时间,有效地提取信号中的奇异特征;根据不同的故障发生时的频谱特征,能够识别出不同的故障,进行机组振动故障检测与故障诊断。
6) time-frequency mesh map
时频网格图
1.
Its time-frequency mesh map, contour map and sectional map are built based on its FFT decomposing algorithm.
根据其FFT分解算法构造出谐波小波的时频网格图、时频等高线图与时频剖面图,并用它们成功提取出某试验台齿轮箱的周期性断齿冲击信号,说明谐波小波具有较大的工程应用价值。
补充资料：哭李频员外时在建川
【诗文】：
出麾临建水，下世在公堂。
苦集休开箧，清资罢转郎。
瘴中无子奠，岭外一妻孀。
定是浮香骨，东归就故乡。
【注释】：
【出处】：
全唐诗：卷716-35
出麾临建水，下世在公堂。
苦集休开箧，清资罢转郎。
瘴中无子奠，岭外一妻孀。
定是浮香骨，东归就故乡。
【注释】：
【出处】：
全唐诗：卷716-35
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