Results 91 to 100 of about 6,788 (257)

Minimizing Sensor Failures in Wireless Rechargeable Sensor Networks With Obstacles Through Fresnel Diffraction Model

IEEE Journal of the Electron Devices Society
In this paper, we mainly focus on the charging scheduling problem in Wireless Rechargeable Sensor Networks (WRSNs) with obstacles. We first describe the influences of obstacles on the charging signals through the Fresnel Diffraction Model (FDM).
Kun Wang, Zhejun Shen
doaj   +1 more source

Correlated X‐Ray and Electron Microscopies of a Single Biphasic GaAs Nanowire

Small Methods, EarlyView.
Nano‐focused scanning X‐ray diffraction microscopy at a synchrotron light source, combined with transmission electron microscopy, reveals a clear correlation between the nanoscale distribution of cubic and hexagonal segments in a GaAs nanowire with subtle variations in inter‐reticular spacing, bending, and twisting.
Thomas Dursap, Tao Zhou, Maxime Dupraz, Stéphane Labat, Olivier Thomas, Niels Fardeau, Philippe Regreny, Michel Gendry, Solène Brottet, Nicholas P. Blanchard, Martin V. Holt, Marie‐Ingrid Richard, Alexandru Danescu, José Penuelas, Matthieu Bugnet   +14 more
wiley   +1 more source

Vector diffraction based on 3D Huygens-Fresnel principle and vector decomposition in Cartesian coordinate

Results in Optics
We proposed vector diffraction equations based on 3D Huygens-Fresnel principle and vector decomposition in Cartesian coordinate. Our expression should more accurate than classical Richards-Wolf diffraction, because the deduction of Richards-Wolf ...
Yi Yang, Ke-Gui Xia
doaj   +1 more source

Impact of substrate curvature on grazing‐incidence small‐angle X‐ray scattering signal: theory and example of Ag thin‐film growth

Journal of Applied Crystallography, EarlyView.
The paper formally addresses the influence of the substrate curvature and size on the grazing‐incidence small‐angle X‐ray scattering (GISAXS) signal. Using the established theory, GISAXS can be combined with substrate‐curvature‐based stress measurements, which is demonstrated on the example of Ag thin‐film growth.Grazing‐incidence small‐angle X‐ray ...
Michał Kamiński, Bärbel Krause, Gregory Abadias, Alessandro Coati, Yves Garreau, Anny Michel, Andrea Resta, Karan Solanki, Alina Vlad, David Babonneau   +9 more
wiley   +1 more source

Signal‐to‐noise and spatial resolution in in‐line imaging. 3. Optimization using a simple model

Journal of Synchrotron Radiation, EarlyView.
Geometrical magnification and X‐ray energy are optimized with respect to spatial resolution, contrast, noise, radiation dose and other image quality characteristics. The optimization is performed using a simple theoretical model of a homogeneous edge feature embedded in a bulk uniform sample, and the resulting generic analytical expressions for image ...
Timur E. Gureyev, David M. Paganin, Harry M. Quiney   +2 more
wiley   +1 more source

Errors in reconstruction of dichroic X‐ray orientation tomography due to polarization rotation of the incident beam

Journal of Synchrotron Radiation, EarlyView.
Linear dichroic X‐ray tomography is a technique in which the linear dichroism of anisotropic materials is used to image crystal orientation in three dimensions. We show that the reconstruction of tomograms is subject to errors due to the change in polarization on propagation through the material and propose strategies for mitigating these effects ...
Matthew A. Marcus, Harlan Heilman, Kas Andrle, Jayden Plumb   +3 more
wiley   +1 more source

Effect of Tube Number on Critical Heat Flux and Thermal Performance in Linear Fresnel Collector Based on Direct Steam Generation

, 2020
Najmeh Salehi, Arash Mirabdolah Lavasani, Ramin Mehdipour   +2 more
openalex   +2 more sources

Defocused illumination with beam‐shaping condenser for uniform wide‐field X‐ray imaging

Journal of Synchrotron Radiation, EarlyView.
A defocused illumination method based on a beam‐shaping condenser to suppress fringe artifacts arising from rectangular aperture diffraction and sub‐grating interference is developed, providing an effective and practical approach for achieving wide‐field and uniform illumination in X‐ray microscopy.The beam‐shaping condenser (BSC) has become a key ...
Kuanqiang Zhang, Yijue Luo, Yunfan Di, Chenfei Guo, Changhao Li, Menghui He, Chao Zhang, Fangfang Peng, Wen Liu, Zhao Wu, Yong Guan, Yangchao Tian, Gang Liu   +12 more
wiley   +1 more source

Novel Focusing Performances of High-Numerical-Aperture Micro-Fresnel Zone Plates with Selective Occlusion

Photonics
In this study, novel focusing performances of high-numerical-aperture (NA) micro-Fresnel zone plates (FZPs) with selective occlusion are identified and investigated through numerical calculations based on vectorial angular spectrum (VAS) theory, and ...
Qiang Liu, Yunpeng Wu, Yuanhao Deng, Junli Wang, Wenshuai Liu, Xiaomin Yao   +5 more
doaj   +1 more source

Theoretical framework for soft X‐ray Fourier transform spectroscopy using the Wigner function

Journal of Synchrotron Radiation, EarlyView.
A theoretical framework for the propagation of partially coherent Gaussian radiation in a modified Mach–Zehnder interferometer designed for Fourier transform spectroscopy applications is presented.This work presents a theoretical framework for the propagation of partially coherent Gaussian radiation in a modified Mach–Zehnder interferometer designed ...
Chuzida Chen, Andrew Lindburg, Honghe Ding, Antoine Wojdyla, Howard Padmore, Per-Anders Glans, Jinghua Guo   +6 more
wiley   +1 more source