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Bartlett estimator is a widely used objective function in matched field inversion (MFI) to quantify the misfit between measured acoustic field and replica field. In this paper, under the assumption of additive spatially correlated Gaussian residual errors, a normalized covariance weighted Bartlett estimator is employed in geoacoustic inversion as the objective function utilizing global optimization...
This paper presents a novel on-line path planner for multiple UAVs based on the distributed planning scheme and the bi-level programming technique, in the presence of diverse surface-to-air missiles (SAMs) deployed within large operational spaces. With a formal problem formulation, the planner offers a hierarchical architecture that not only provides global convergence and optimized solution for the...
Reconstruction of unknown medium characteristics such as shape, refractive index by measurements of scattered acoustic wave data has wide application in nondestructive detection for engineering and medical use, which is a typical nonlinear and severely ill-posed problem. Under the setting of a smooth background containing a small number of unknown small inhomogeneous inclusions, we propose in this...
With the basic objective of giving a feasible path in online path planning problem for unmanned air vehicles, smoothness requirement should be considered for further to satisfy more special applications. The paper emphasizes this realistic requirement, and presents an integrated solution based on a leader-follower decision idea. In the solution, global and local optimization strategies are analyzed,...
In order to predict the reliability of the product with high reliability and long life, the accelerated degradation test (ADT) is commonly applied. However, in the studies of optimizing the ADT plans, there is nearly no researches on how to select the test stress levels. In this paper, the drift Brownian motion is selected as the degradation model. The optimization of the selection of the stress levels...
Deploying a concentrator for a photovoltaic (PV) system has been proved to be one of the most efficient ways to reduce the junction material cost per watt output, and to increase the power output per unit module area facing the sun. In this paper a novel side-mounted concentrator solar module structure and design that could be rather compact and thin compared to current designs, and yet provides good...
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