Results 31 to 40 of about 2,588 (207)

Efficient 3D Image Reconstruction for Near-Field Microwave Imaging Using Dynamic Metasurface Antenna

IEEE Access, 2022
In this paper, rapid reconstruction of a three-dimensional (3D) image of a scene for near-field microwave imaging using a dynamic metasurface antenna (DMA) is addressed.
Amir Masoud Molaei, Vasiliki Skouroliakou, Vincent Fusco, Okan Yurduseven   +3 more
doaj   +1 more source

SAR Observation Error Estimation Based on Maximum Relative Projection Matching

International Journal of Antennas and Propagation, 2020
The existing sparse imaging observation error estimation methods are to usually estimate the error of each observation position by substituting the error parameters into the iterative reconstruction process, which has a huge calculation cost.
Y. Zhang, B. P. Wang, Y. Fang, Z. X. Song   +3 more
doaj   +1 more source

Nonlinear Projected Sparse Optimization Approach Based on Adam Algorithm for Microwave Imaging [PDF]

2020 Advances in Science and Engineering Technology International Conferences (ASET), 2020
A microwave imaging algorithm based on contrast-field equations is developed for sparse domains. The proposed algorithm is inspired by machine learning optimization schemes. More specifically it is based on Adam approach which is a first-order gradient optimization algorithm that has been studied intensively in optimizing artificial neural networks. To
Abdulla Desmal, Ali Imran Sandhu, Hakan Bagci   +2 more
openaire   +1 more source

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

High‐Power Rapid Laser‐Induced Synthesis of Multi‐functional Cobalt Metal‐Organic Framework With an Unprecedented Synthesis Efficiency

Advanced Materials Technologies, EarlyView.
Laser‐assisted synthesis enables rapid (within 1 h) and high‐yield (≥90%) production of Co‐MOFs with mesoporous structures, tunable magnetic and optical properties, and efficient adsorption of N2, CH4, and CO2 for low‐energy gas separation. DFT calculations elucidate the electronic structure and adsorption behavior.
Saliha Mutlu, Bülend Ortaç, Ali Karatutlu, Taylan Gorkan, Engin Durgun, Dilek Soyler, Saniye Soylemez, Jelena Lillepäg, Volkan Filiz, Nergis Arsu, Sevil Savaskan Yilmaz   +10 more
wiley   +1 more source

Geometric Continuity Characterization of Urban Buildings in SAR 3D Imaging Domain and Few-tracks 3D Imaging

Leida xuebao
Synthetic Aperture Radar (SAR) is an active microwave sensing technology capable of all-weather, day-and-night operation, making it a critical source of Earth observation data.
Fengming HU, Jifan TIAN, Guozhen CHENG, Feng XU   +3 more
doaj   +1 more source

3D imaging of moving targets for ultra‐wideband MIMO through‐wall radar system

IET Radar, Sonar & Navigation, 2021
Ultra‐wideband (UWB) radar is widely used in static through‐wall imaging (TWI). There are still many imaging problems of motion through‐wall targets for complex system structure and unknown wall environment.
Jun Pan, Shengbo Ye, Cheng Shi, Kun Yan, Xin Liu, Zhikang Ni, Guangyao Yang, Guangyou Fang   +7 more
doaj   +1 more source

Non-Linear Regularized Attenuation Compensation for Microwave Breast Imaging

IEEE Open Journal of Signal Processing, 2023
We develop non-linear optimization algorithms for attenuation compensation of rapidly time-varying microwave signals in the context of breast imaging.
Nasser Kazemi, Elise Fear
doaj   +1 more source

Ultrasound‐Actuated Gene Editing in Human Kidney Organoids

Advanced Science, EarlyView.
Peptide‐stabilized nanoemulsions enable spatially controlled, ultrasound‐triggered delivery of gene‐editing proteins deep within human kidney organoid tissues. Focused acoustic pulses drive droplet vaporization, propelling cargo into target renal cells while preserving native tissue microarchitecture. This non‐viral platform improves both the depth and
Michael A. Miller, Nicole Vo, Utkarsh, Ivan Sokirniy, Justin Pritchard, Benjamin S. Freedman, Scott H. Medina   +6 more
wiley   +1 more source

Fast Frequency-Diverse Radar Imaging Based on Adaptive Sampling Iterative Soft-Thresholding Deep Unfolding Network

Remote Sensing, 2023
Frequency-diverse radar imaging is an emerging field that combines computational imaging with frequency-diverse techniques to interrogate the high-quality images of objects.
Zhenhua Wu, Fafa Zhao, Lei Zhang, Yice Cao, Jun Qian, Jiafei Xu, Lixia Yang   +6 more
doaj   +1 more source