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Therefore, integral methods cannot effectively rectify the local degradation caused by microlens surface errors, and moreover, such approaches generate problems of large computational complexity, insignificant correction effects, or excessive correction. In order to reverse the effects of the MLA surface ...
The future research focus of nonlinear ultrasonic array technology is mainly to clarify the discontinuous interaction mechanism between acoustic waves and the medium during nonlinear ultrasonic detection and to solve problems such as defect identification and de- tection robustness. Meanwhile, how to ...
However, Direction of Arrival (DOA) estimation in low-angle areas is still one of the most challenging problems, especially for the Very High Frequency (VHF) radar system, which has antennae that are severely restricted in terms of aperture and height. The poor performance of the angle ...