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Ultrasonic sparse array can increase the resolution by enlarging the aperture without adding system complexity, and it has characteristics of large scanning range and high detection accuracy, which is one of the most promising applications of ultrasonic nondestructive testing technology. The application of reciprocity theory to scattering of guided waves by flaws was studied. A finite element model...
In most works of network tomography, end-to-end measurements are conducted based on the assumption of single-path routing. However, multipath routing caused by load balancing is increasingly common in today's Internet and makes it hard to tell which end-to-end path is measured by the current probing flow. In this letter, we propose a tomographic scheme able to reveal the corresponding relationship...
Bioluminescence Tomography (BLT) reconstruction is a highly ill-posed inverse problem. In this research, we formulate it as a quadratically constrained least squares problem and present a trust region method for solving this problem. Simulations based on a heterogeneous phantom demonstrate that the trust region method has the capability to effectively handle the ill-posedness of BLT. The experiments...
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