Source-Space Compressive Matched Field Processing for Source Localization

Abstract

Source localization by matched-field processing (MFP) can be accelerated by building a database of Green's functions which however requires a bulk-storage memory. According to the sparsity of the source locations in the search grids of MFP, compressed sensing inspires an approach to reduce the database by introducing a sensing matrix to compress the database. Compressed sensing is further used to estimate the source locations with higher resolution by solving the 𝑙1 −norm optimization problem of the compressed Green's function and the data received by a vertical/horizontal line array. The method is validated by simulation and is verified with the experimental data.

Radiative heat transfer in many-body systems: Coupled electric and magnetic dipole approach

“…Over the past few years, many theoretical approaches on NFRHT problems have been put forward by combining the Maxwell electromagnetic theory and the fluctuation-dissipation theorem [3]. These approaches, including the Green's function [3,[19][20][21], the scattering matrix [22][23][24][25][26], the finite difference time domain [27][28][29][30][31], the thermal discrete dipole approximation [32][33][34], the rigorous coupled wave analysis [35][36][37][38],the fluctuating surface [39][40][41] and volume [42][43][44] current etc., greatly enrich our understanding of NFRHT problems. Meanwhile, more and more experimental researches on NFRHT have been performed [45][46][47][48][49][50][51][52][53].…”

The Progress and Future of Near-field Radiative Heat Transfer

“…[17][18][19][20][21] The uniaxial hyperbolic materials can be natural or equivalent based on the effective medium theory. With the development of the calculation methods of the NFRHT, the two-body system has developed to include gratings and other microstructures, [29][30][31][32][33][34] and the corresponding physical mechanism has become more abundant. For example, even for conventional isotropic materials, the guided modes (GMs), HMs, spoof surface plasmon polartions (SSPPs), magnetic polaritons (MPs), and SPPs all can be the important physical mechanisms significantly affecting the NFRHT between two gratings.…”

“…For example, even for conventional isotropic materials, the guided modes (GMs), HMs, spoof surface plasmon polartions (SSPPs), magnetic polaritons (MPs), and SPPs all can be the important physical mechanisms significantly affecting the NFRHT between two gratings. [29][30][31][32][33] Therefore, when materials are anisotropic or other unconventional materials, it can be inferred that there would be more possible new physical mechanisms significantly affecting NFRHT to be developed. Another important development for the structure of NFRHT is extending the two-body system to the many-body system.…”

Near-Field Radiative Heat Transfer under Temperature Gradients and Conductive Transfer

“…hyperbolic metamaterials [35,36] or lattices of metallic antennas [37,38], where RHT can be further enhanced [35,[37][38][39][40][41] and modified [42][43][44][45] compared to planar structures [37]. However, our ability to solve the coupled conduction-radiation problem (1) in arbitrary geometries hinges on our ability to compute H(x, x′) in full generality, which is possible thanks to a recently introduced FVC method that exploits powerful EM scattering techniques [26] to enable fast calculations of RHT between arbitrarily shaped objects subject to arbitrary temperature distributions.…”