L
Li Cai
Researcher at National University of Defense Technology
Publications - 19
Citations - 347
Li Cai is an academic researcher from National University of Defense Technology. The author has contributed to research in topics: Metamaterial & Cloak. The author has an hindex of 8, co-authored 16 publications receiving 256 citations.
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Band transition and topological interface modes in 1D elastic phononic crystals.
TL;DR: By constructing a structural system formed by two PCs with different topological phases, this report experimentally demonstrate the existence of interface mode within the bulk band gap as a result of topological transition for both longitudinal and bending modes in elastic systems, although for bending modes, additional conditions have to be met in order to have the interface mode.
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Sound insulation property of membrane-type acoustic metamaterials carrying different masses at adjacent cells
TL;DR: In this article, the experimental realization and theoretical understanding of membrane-type acoustic metamaterials embedded with different masses at adjacent cells, capable of increasing the transmission loss at low frequency was presented.
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Acoustic cloak/anti-cloak device with realizable passive/active metamaterials
TL;DR: In this article, the authors used the coordinate transformation method, together with exchange of variables between Maxwell's equations and the acoustic equations with axial-invariance in cylindrical coordinates, to obtain the acoustic parameters (anisotropic density and scalar bulk modulus) for an ideal cloak and an ideal anti-cloak.
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Acoustic directional radiation operating at the pass band frequency in two-dimensional phononic crystals
TL;DR: In this paper, the phase constant surfaces of two-dimensional phononic crystals consisting of steel cylinders in water are calculated to predict the directivity of acoustic wave propagation, and the prediction is validated by the acoustic field distributions of a finite structure with 24 × 24 unit cells.
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Acoustic cloak based on Bézier scatterers
TL;DR: This work presents a method allowing the reduction of the number of discrete scatterers by optimizing their external shape, which is here defined by a combination of cubic Bézier curves.