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Ground clutter characteristics of airborne pulse Doppler radar affected by some factors such as antenna array orientation, pulse repetition frequency. This paper analyzed the ground clutter characteristic of airborne forward looking pulse Doppler radar in high PRF, pointed out some notable features of the clutter, presented the results of clutter simulation, thereby offering valuable reference for...
If the mirror Doppler frequency components not be suppressed well in airborne pulsed Doppler radar, which would bring on false target detection, how to suppress the mirror Doppler frequency is an important issue to enhance radar performance. This paper proposed an method for the suppression of mirror Doppler frequency based on Hilbert transform, the results of processing experiment data show the suppression...
There is currently not a standardized technique for the sizing and shaping of surgical closure of the ventricular septal defect (VSD) patch in patients with right coronary aortic cusp prolapse and aortic regurgitation (AR) complicating VSD in the outlet septum.Forty-six VSD patients who had aortic valve prolapse were divided into groups DC (direct closure, n=19), and SPC (small patch closure, n=27)...
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