Multiple target distinguishing technique based on Doppler spectrum;

Then ,with the introduction of the conceptions of lowpass-spectrum width and bandpass-spectrum width,Doppler spectrum features are in- vestigated for three typical micro-motion targets.

According to Barrick s forst-order and second-order sea echo radar cross section equations of HF radar,combined with ocean wave spectrum and the equal-frequence contour line,the narrow-beam sea echo doppler spectrum was simulated.

Study on the electromagnetic scattering and Doppler spectra from two-scale time-varying fractal rough sea surface;

Based on the 2-D ocean-like surface of linear model and the first-order small slope approximation,the characteristic of Doppler shift for different order Doppler spectra of scattered echoes is investigated and the formula of Doppler shift is derived.

Respiratory frequency inspecting system of ultrasonic Doppler;

The Research of the Blood Stream Dynamics by Transcortical Doppler for Migraine Diapause

After the rats were induced diabetes with stroptozotocin, the circulatory parameters of the central retinal artery ( CRA ) were measured using color Doppler imaging, including peak systolic velocity ( PSV) , end diastolic velocity ( EDV) , mean velocity (MV) , resistive index (RI) , and pulsitive index (PI).

Noncontact detection utilize the phase modification of the detection echo to analysis micro-Doppler information in order to realize target detection and parameters estimation, which is widely used in rescue service, antiterrorists enforcements, and remote medicine, etc.