Results 21 to 30 of about 3,317,108 (334)
Photoacoustic imaging reveals hidden underdrawings in paintings
Scientific Reports, 2017 A novel, non-invasive, imaging methodology, based on the photoacoustic effect, is introduced in the context of artwork diagnostics with emphasis on the uncovering of hidden features such as underdrawings or original sketch lines in paintings ...
George J. Tserevelakis +6 more
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A Pavement Piezoelectric Energy Harvester for Small Input Displacements
Micromachines, 2023 In order to collect mechanical energy from human motions on pavement without an obvious disturbance, a piezoelectric harvester for small displacement is proposed. A seesaw mechanism is utilized to transmit the pressure displacement to piezoelectric beams.
Bin Yin, Jiaming Wei, Xin Jiang, Yan Liu
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Graph-based linear scaling electronic structure theory [PDF]
, 2016 We show how graph theory can be combined with quantum theory to calculate the electronic structure of large complex systems. The graph formalism is general and applicable to a broad range of electronic structure methods and materials, including ...
Bock, Nicolas +10 more
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Effect of Ground Plane Deformation on Electrical Performance of Air Microstrip Antennas
International Journal of Antennas and Propagation, 2020 This paper covers the variation of electrical performance of air microstrip antennas due to its ground plane deformation. A typical sinusoidal function is utilized to characterize the shape of deformation, based on which different shapes of ground plane ...
Wei Wang +4 more
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Sensors, 2022 A method based on an interval arithmetic is proposed to analyze uncertain factors such as the curvature radii, excitation amplitude, and excitation phase of a spherical conformal array antenna.
Guangda Ding +4 more
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International Journal of Antennas and Propagation, 2015 Composite material is widely used in the conformal load-bearing antenna structure (CLAS), and the manufacturing flaws in the packaging process of the CLAS will lead to the degradation of its wave-transparent property.
P. Li, W. Y. Xu, L. W. Song, Y. Y. Qiu
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Miniaturized Wideband CP Antenna Using Hybrid Embedded Metasurface Structure
IEEE Access, 2022 In this study, a hybrid embedded metasurface (MTS) structure is proposed and applied to realize a miniaturized MTS antenna. In contrast to the conventional periodic rectangular MTS, the proposed MTS structure is formed by hybrid embedded patches composed
Bin Zheng +4 more
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Sensors, 2023 The inverse finite element method (iFEM) is a novel method for reconstructing the full-field displacement of structures by discrete measurement strain. In practical engineering applications, the accuracy of iFEM is reduced due to the positional offset of
Jiewei Lu +3 more
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ELECTRONIC STRUCTURE AND LUMINESCENCE OF CSI:NA [PDF]
, 1979 Calculations are performed on several aspects of the luminescence of pure CsI and CsI:Na. These include electronic-structure calculations by both pseudopotential and semi-empirical molecular-orbital methods, as well as lattice-configuration studies.
MONNIER, R +3 more
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Antireflection coated semiconductor laser amplifier for Bose-Einstein condensation experiments
AIP Advances, 2018 We present a slave laser highly suitable for the preparation and detection of 87Rb Bose-Einstein condensates (BEC). A highly anti-reflection coated laser diode serves as an optical amplifier, which requires neither active temperature stabilization nor ...
Saurabh Pandey +7 more
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