Results 61 to 70 of about 40,188 (259)

Dual-Chirp Photonics-Based Radar for Distance and Velocity Measurement Based on Compressive Sensing

IEEE Photonics Journal, 2022
We proposed a dual-chirp microwave photonic radar based on compressive sensing for distance and velocity measurement. This radar can generate different chirp linear frequency modulated (LFM) signals using a dual-parallel Mach-Zehnder modulator (DPMZM ...
Yujiao Ding, Shuxu Guo, Hao Wu, Di Wang, Jiaqi Li, Yang Yang, Fengtao Cui, Wei Dong   +7 more
doaj   +1 more source

Xampling: Signal Acquisition and Processing in Union of Subspaces

, 2011
We introduce Xampling, a unified framework for signal acquisition and processing of signals in a union of subspaces. The main functions of this framework are two.
Eldar, Yonina C., Elron, Asaf, Mishali, Moshe   +2 more
core   +1 more source

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

Performance Investigation of a Cost- and Power-Effective High Nonlinearity Tolerance OFDMA-PON Scheme Based on Sub-Nyquist Sampling Rate and DFT-Spread

IEEE Access, 2019
We investigate the performance of a cost- and power-effective high nonlinearity tolerance orthogonal frequency-division multiple access passive optical network scheme based on sub-Nyquist sampling and discrete Fourier transform spread.
Yupeng Li, Jiawei Han, Xiaonan Zhao
doaj   +1 more source

Cognitive Sub-Nyquist Hardware Prototype of a Collocated MIMO Radar

, 2016
We present the design and hardware implementation of a radar prototype that demonstrates the principle of a sub-Nyquist collocated multiple-input multiple-output (MIMO) radar.
Cohen, David, Dror, Shahar, Eldar, Yonina C., Ifraimov, Robert, Madmoni, Ron, Meltsin, Maxim, Mishra, Kumar Vijay, Namer, Moshe, Shoshan, Eli   +8 more
core   +1 more source

Mechanochemistry‐Assisted Solvent‐Free Supramolecular Engineering for Atomic‐Layered Carbon Nitride Nanosheets with Enhanced Photocatalytic Hydrogen Evolution

Advanced Functional Materials, EarlyView.
A solvent‐free mechanochemistry‐enabled supramolecular engineering strategy is developed to directly synthesize covalent‐interconnected two‐dimensional atomic‐layered carbon nitride nanosheets photocatalyst, bypassing conventional top‐down exfoliation requirements.
Fanglei Yao, Jingwen Sun, Huiru Duan, Yongsheng Fu, Jin Wang, Liming Dai, Jingsan Xu, Junwu Zhu   +7 more
wiley   +1 more source

A Sub-Nyquist Radar Electronic Surveillance System

IEEE Access, 2018
The modulated wideband converter (MWC) is well-known for a sub-Nyquist wideband sampling capability based on compressed sensing (CS) theory. In this paper, our goal is to use the MWC as a base to design a sub-Nyquist radar electronic surveillance (ES ...
Jeong Park, Jehyuk Jang, Sanghun Im, Heung-No Lee   +3 more
doaj   +1 more source

Ghost edge detection based on HED network

Frontiers of Optoelectronics, 2022
In this paper, we present an edge detection scheme based on ghost imaging (GI) with a holistically-nested neural network. The so-called holistically-nested edge detection (HED) network is adopted to combine the fully convolutional neural network (CNN ...
Shengmei Zhao, Yifang Cui, Xing He, Le Wang   +3 more
doaj   +1 more source

GeAl2‐2xFe2xO3(OH)4 Nanotubes: New Electrocatalyst for Oxygen Evolution Reaction

Advanced Functional Materials, EarlyView.
Fe‐doped imogolite nanotubes are synthesized via a one‐step hydrothermal method with varying Fe substitution ratios x. Structural and spectroscopic analyses confirm homogeneous Fe incorporation while preserving tubular shape. Optimal doping at x = 0.05 enhances optical absorption, narrows band gap, reduces charge transfer resistance, and significantly ...
Yassine Naciri, Jian Li, Wahid Ullah, Fabien Baron, Franck Bourdelle, Stéphan Rouzière, Claire Goldmann, Erik Elkaim, Thomas Bizien, Rachid Belkhou, Delphine Vantelon, Mohamed Nawfal Ghazzal, Erwan Paineau   +12 more
wiley   +1 more source

Uncertainty principle, Shannon-Nyquist sampling and beyond

, 2015
Donoho and Stark have shown that a precise deterministic recovery of missing information contained in a time interval shorter than the time-frequency uncertainty limit is possible.
Fujikawa, Kazuo, Ge, Mo-Lin, Liu, Yu-Long, Zhao, Qing   +3 more
core   +1 more source