JOURNAL OF DIFFERENTIAL EQUATIONS | 卷:254 |
On near-cloak in acoustic scattering | |
Article | |
Liu, Hongyu | |
关键词: Inverse acoustic scattering; Invisibility cloaking; Transformation optics; Lossy layer; Regularization; Asymptotic estimates; | |
DOI : 10.1016/j.jde.2012.10.015 | |
来源: Elsevier | |
【 摘 要 】
Invisibility cloaking in acoustic scattering via the approach of transformation optics is considered. The near-cloaks of both passive medium and active/radiating object are investigated. From a practical viewpoint, we are especially interested in the cloaking of an arbitrary (but regular) content. It is shown that one cannot achieve the near-cloak unless some special mechanism is introduced into the construction. A general lossy layer is incorporated into the construction of our near-cloaking devices. We derive very accurate estimates of the scattering amplitude in terms of the regularization parameter and the material parameters of the lossy layer in different settings. (C) 2012 Elsevier Inc. All rights reserved.
【 授权许可】
Free
【 预 览 】
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10_1016_j_jde_2012_10_015.pdf | 244KB | download |