Method of distributed power system fault line selection based on transient high frequency instantaneous zero-sequence power;

Diagnosis method of instantaneous frequency for rotor impact-rub fault of aeroengine;

Ultrasonic signal process method based on instantaneous frequency;

Study of analysis of instantaneous frequency in partial wave method;

Aiming at the characteristic of LFM radar signal,this paper analyzes the thoery of distilling instant frequency of LFM signal based on the means of instant phase firstly.

The technology of extracting instant frequency in digital reconnaissance receiver is given and realized by DSP.

According to the accuracy measuring instrument of local oscillator frequency agility radar,an example was presented in which SAWD technology was employed to derive instant frequency.

An approach using transient frequency analysis based on complex analytical wavelet transform is proposed in the paper.

In order to make up for this defect,the time-frequency analysis method of Hilbert-Huang transform(HHT)and the conception of transient frequency were introduced,and the empirical mode decomposition(EMD)and its time-frequency distribution abou.

All of the enrolled patients undertook the Biering Sorensen test(BST) and the object-lifting test,a Finland made type ME3000P sEMG instrument was applied to record the electronic activities of paraspinal muscles(convex /concave) of all subjects,and the frequency domain indexes:median frequency(MF),mean power frequency(MPF),zero crossing rate(ZCR) were analyzed.

All of the enrolled patients undertook the Biering Sorensen test(BST) and the object-lifting test,a Finland made type ME3000P sEMG instrument was applied to record the electronic activities of paraspinal muscles(convex /concave) of all subjects,and the frequency domain indexes:median frequency(MF),mean power frequency(MPF),zero crossing rate(ZCR)were analyzed.