Results 31 to 40 of about 83,591 (207)

A Channel Phase Error Correction Method Based on Joint Quality Function of GF-3 SAR Dual-Channel Images

Sensors, 2018
Multichannel SAR is an effective approach to solving the contradiction between high azimuth resolution and wide swath. The goal of this paper is to obtain a new and effective method for estimating and compensating the interchannel phase error of the ...
Guangcai Sun, Jixiang Xiang, Mengdao Xing, Jun Yang, Liang Guo   +4 more
doaj   +1 more source

Real‐Time Ferroelectric Domain Wall Dynamics During Electric Poling and Depoling

Advanced Science, EarlyView.
Real‐time visualization of domain wall dynamics during alternating‐current poling, direct‐current poling, and electrical depoling in relaxor‐PT ferroelectric single crystals reveals distinct field‐dependent pathways and strong path dependence. Instant polarized light microscopy uncovers reversible domain wall nucleation, motion, and reconfiguration ...
Ziqi Wang, Zhengze Xu, Anastasia Timofeeva, Hossam Elnaggar, Sipan Liu, Yusen Pei, Reece Henry, Brendan O'Connor, Eunkyoung Shim, Franky So, Kara Peters, Xiaoning Jiang, Jun Liu   +12 more
wiley   +1 more source

Suppressing Paired Echoes Caused by Stair-Step Antenna Steering in TOPS SAR Imaging

Remote Sensing, 2019
The use of electronically steered antennas in the azimuth dimension typically leads to a staircase-like antenna beam steering law in the Terrain Observation by Progressive Scan (TOPS) wide-swath synthetic aperture radar (SAR) data acquisition mode, which
Feng He, Yongsheng Zhang, Tianzhu Yi, Guanghu Jin, Zhen Dong   +4 more
doaj   +1 more source

Cross‐scale Material‐Structure Synergy for 2D Metamaterials: Toward Customizable Intelligent Electromagnetic Manipulation in Multiphysics Fields

Advanced Science, EarlyView.
Recent advances in metasurface‐enabled low‐observable technologies are reviewed from the perspective of cross‐scale material–structure synergy. Electromagnetic, thermal, optical, and acoustic stealth are highlighted together with dynamic tuning, programmable coding, data‐driven inverse design, artificial intelligence, multispectral compatibility, and ...
Shuhao Wang, Xing Yang, Liping Liu, Yang Peng, Yangyang Wang, Hualiang Lv   +5 more
wiley   +1 more source

Motion-Compensated Reconstruction for Azimuth Multi-Channel Synthetic Aperture Ladar: A Robust Framework for High-Resolution Wide-Swath Imaging

Remote Sensing
Azimuth multi-channel (AMC) Synthetic Aperture Ladar (SAL) is a promising technique for overcoming the inherent trade-off between azimuth resolution and swath width in single-channel SAL, by replacing temporal sampling with spatial sampling. However, due
Xin Tang, Junying Yang, Yi Zhang
doaj   +1 more source

Signal Processing for a Multiple-Input, Multiple-Output (MIMO) Video Synthetic Aperture Radar (SAR) with Beat Frequency Division Frequency-Modulated Continuous Wave (FMCW)

Remote Sensing, 2017
In this paper, we present a novel signal processing method for video synthetic aperture radar (ViSAR) systems, which are suitable for operation in unmanned aerial vehicle (UAV) environments.
Seok Kim, Jiwoong Yu, Se-Yeon Jeon, Aulia Dewantari, Min-Ho Ka   +4 more
doaj   +1 more source

CO‐Adsorption on MgO Revisited: Polarization‐Resolved Identification of Step Edges as the Dominant Defects on MgO(100) and MgO(110)

Angewandte Chemie International Edition, EarlyView.
By combining polarization‐resolved IRRAS with hybrid HSE06 DFT calculations, we establish site‐specific vibrational fingerprints, adsorption geometries, and binding energies for CO on wide‐band‐gap MgO surfaces. Low‐coordinated Mg4c2+ step‐edge sites, rather than terrace Schottky defects, are identified as the dominant binding and reactive sites, with ...
Wangtao Li, Chengwu Yang, Pablo G. Lustemberg, Zairan Yu, Alexei Nefedov, Weijia Wang, Gianfranco Pacchioni, M. Veronica Ganduglia‐Pirovano, Yuemin Wang, Christof Wöll   +9 more
wiley   +1 more source

A Sparse SAR Imaging Method for Low-Oversampled Staggered Mode via Compound Regularization

Remote Sensing
High-resolution wide-swath (HRWS) imaging is the research focus of the modern spaceborne synthetic-aperture radar (SAR) imaging field, with significant relevance and vast application potential.
Mingqian Liu, Jie Pan, Jinbiao Zhu, Zhengchao Chen, Bingchen Zhang, Yirong Wu   +5 more
doaj   +1 more source

Research on Key Technologies of Precise InSAR Surveying and Mapping Applications Using Automatic SAR Imaging [PDF]

Journal of Geodesy and Geoinformation Science, 2019
Precise interferometric synthetic aperture radar (InSAR) is a new intelligent photogrammetric technology that uses automatic imaging and processing means. Precise InSAR has become the most efficient satellite surveying and mapping (SASM) method that uses
Xinming TANG,Tao LI,Xiaoming GAO,Qianfu CHEN,Xiang ZHANG
doaj   +1 more source

Understanding the Aqueous Self‐Assembly of Raw Sophorolipid Mixtures Using a Statistical Approach Applied to Synchrotron Small Angle X‐Ray Scattering (SAXS): A Focus on pH, Dilution, Aging, and the Underestimated Role of Residual Fatty Acids

Journal of the American Oil Chemists' Society, EarlyView.
The statistical analysis of SAXS modelling data allows to identify the critical physicochemical parameters that have an impact on the phase behavior of crude sophorolipid batches. ABSTRACT The aqueous self‐assembly of raw sophorolipid mixtures has been studied by small angle x‐ray scattering (SAXS) to understand the impact of the composition ...
Maia Ouret‐Campagnet, Sélène Chappuis, Jean‐Christophe Castaing, Petra Pernot, François Ribot, Niki Baccile   +5 more
wiley   +1 more source