Time-frequency-energy的意思|示意

Using time-frequency energy distribution we can analyze, process any signal and abstract information in given time or frequency.

利用时频分布，可以对各种信号进行分析、处理，提取信号在特定时间特定频率所具有的特征信息。

This paper investigates energy distribution of air-borne acoustic signals in time-frequency domain during aluminum alloys spot welding in order to identify weld nugget states.

研究了铝合金点焊过程中声音信号的时频域能量分布，并应用它来识别点焊的熔核状态。

The application shows that it can analyze the change of the short-time energy of vector signals as frequency and time change, being applicable to the fault diagnosis of rotational machinery.

研究表明，短时矢功率谱可以对矢量信号的短时能量随频率、时间等的变化过程作出分析，可以应用于旋转机械故障诊断实践中。

A new tool that can test the clock base frequency error of energy measuring devices and provide GPS standard time to calibrate real-time clock was introduced in this paper.

介绍了一种用来测量电能计量装置的时钟基频误差，并提供GPS标准时间以校准其实时时钟的新型工具。

The field experiments prove that based on the motor running condition, this solution can real time continuously adjust its running frequency to reach object of energy saving and efficiency increasing.

现场实验证明，该解决方案能根据电机运行状况实时、连续地调节其运行频率，从而达到节能增效的目的。

The concept of local energy in time-frequency plane, based on local wave theory, is defined. Then a new feature extraction method based on the local energy in time-frequency plane is given.

在局域波理论的基础上，引入了时频局部能量的概念，进而提出了一种基于时频局部能量的特征提取方法。