Results 31 to 40 of about 329,283 (282)

Multilayer nonlinear diffraction neural networks with programmable and fast ReLU activation function

Nature Communications
Optical diffractive neural networks are emerging for improving speed and energy efficiency in machine learning. However, the challenges of nonlinear activation functions (e.g., latency issues, high power consumption, and cascading complexity) impede ...
Yu Ming Ning, Qian Ma, Qiang Xiao, Xin Xin Gao, Qian Wen Wu, Ze Gu, Rui Si Li, Long Chen, Jian Wei You, Tie Jun Cui   +9 more
doaj   +1 more source

A Portable Penetrating Radar System for 3D Wall Attribution Inversion

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The wall-penetrating radar is a noncontact sensing technology that uses electromagnetic waves to penetrate buildings and detect concealed structures. The current two-dimensional (2-D) detection systems have difficulty in identifying wall materials.
Su Zhang, Zhengquan Zhang, ZhengXin Lei, Zichang Liang, Fengming Hu, Haipeng Wang, Feng Xu, Yixiang Luomei   +7 more
doaj   +1 more source

Nonreciprocal Electromagnetic Scattering from a Periodically Space-Time Modulated Slab and Application to a Quasisonic Isolator

, 2017
Scattering of obliquely incident electromagnetic waves from periodically space-time modulated slabs is investigated. It is shown that such structures operate as nonreciprocal harmonic generators and spatial-frequency filters.
Caloz, Christophe, Chamanara, Nima, Taravati, Sajjad   +2 more
core   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

Quantum-inspired superposition and nonseparable states of reconfigurable metasurfaces in classical systems

Nature Communications
Classical and quantum bits serve as cornerstone in information science. As this field rapidly evolves, the interplay between the two continues to enrich and inspire each other.
Long Chen, Jian Wei You, Qian Ma, Jian Lin Su, Shi Long Qin, Qiao Cong Peng, Qiang Xiao, Tie Jun Cui   +7 more
doaj   +1 more source

Laser Powder Bed Fusion of Copper–Tungsten Composites for Heat Sink Applications in High‐Power Electronics

Advanced Engineering Materials, EarlyView.
This article demonstrates the successful qualification of a copper–tungsten composite for laser powder bed fusion. The resulting components exhibited high density, high thermal conductivity, and reduced thermal expansion. Heat sinks with complex geometries were successfully manufactured, clearly showcasing the material's potential for additive ...
Simon Rauh, Shashank Deepak Prabhu, Jannik Huber, Lioba Fischer, Gerhard Wolf, Nico Hempel, Peter Mayr   +6 more
wiley   +1 more source

Fractional Integro-Differential Equations for Electromagnetic Waves in Dielectric Media

, 2011
We prove that the electromagnetic fields in dielectric media whose susceptibility follows a fractional power-law dependence in a wide frequency range can be described by differential equations with time derivatives of noninteger order.
A. A. Kilbas, A. A. Stanislavsky, A. Carpinteri, A. K. Jonscher, A. K. Jonscher, A. K. Jonscher, G. M. Zaslavsky, P. Debye, R. R. Nigmatullin, R. R. Nigmatullin, R. R. Nigmatullin, S. G. Samko, V. E. Tarasov, V. E. Tarasov, V. V. Novikov, Y. Yilmaz   +15 more
core   +1 more source

Piezoresistive Monitoring of Carbon Nanomaterial‐Reinforced Epoxy Composites Under Cyclic and Fatigue Loading: A Review

Advanced Engineering Materials, EarlyView.
Carbon nanomaterial‐reinforced epoxy composites exhibit pronounced piezoresistive behavior, enabling intrinsic damage sensing under cyclic and fatigue loading. This review critically compares carbon nanotube and graphene systems, correlating filler content, percolation threshold, and gauge factor with sensing stability and damage evolution.
J. M. Parente, J. Nunes‐Pereira, A. P. Silva, P. N. B. Reis   +3 more
wiley   +1 more source

Coordinated Multi-Input and Single-Output Photonic Millimeter-Wave Communication in W-Band Using Neural Network-Based Waveform-To-Symbol Converter

Photonics
Photonic millimeter-wave communication systems are promising for high-capacity, high-speed wireless networks, and their production is driven by the growing demand from data-intensive applications.
Kexin Liu, Boyu Dong, Zhongya Li, Yinjun Liu, Yaxuan Li, Fangbing Wu, Yongzhu Hu, Junwen Zhang   +7 more
doaj   +1 more source

A Four-leaf Clover-shaped Coding Metasurface For Ultra-wideband Diffusion-like Scattering

Leida xuebao, 2021
In this paper, a novel four-leaf clover-shaped coding metasurface is proposed and applied to achieve an ultra-wideband diffusion-like scattering.
Saifullah YASIR, Guomin YANG, Feng XU
doaj   +1 more source