Results 31 to 40 of about 768,764 (104)

A Focusing Algorithm for Circular SAR Based on Phase Error Estimation in Image Domain

Leida xuebao, 2015
Residual motion error is common in high-resolution circular Synthetic Aperture Radar (SAR) image defocusing. The Signal-to-Clutter Ratio (SCR) in echo data domain is relatively low; thus, the phase error spans several range bins.
Guo Zhen-yu, Lin Yun, Hong Wen
doaj   +1 more source

Assessment of Pharmaceutical Protein–Ligand Pose and Affinity Predictions in CASP16

Proteins: Structure, Function, and Bioinformatics, Volume 94, Issue 1, Page 249-266, January 2026.
ABSTRACT The protein–ligand component of the 16th Critical Assessment of Structure Prediction (CASP16) challenged participants to predict both binding poses and affinities of small molecules to protein targets, with a focus on drug‐like compounds from pharmaceutical discovery projects. Thirty research groups submitted predictions for 229 protein–ligand
Michael K. Gilson, Jerome Eberhardt, Peter Škrinjar, Janani Durairaj, Xavier Robin, Andriy Kryshtafovych   +5 more
wiley   +1 more source

High‐Fidelity 3D Reconstruction From Sparse Multi‐Baseline CSAR Data via Conditional Diffusion Models

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This work proposes a conditional diffusion model framework for high‐fidelity 3D reconstruction from sparse multibaseline circular synthetic aperture radar (CSAR) data, addressing challenges of low vertical resolution, geometric blur and artefacts. The method integrates a dual‐path 3D U‐Net with cross‐attention to fuse coarse reconstruction features ...
Xingyu Zhao, Yanheng Ma, Bingxuan Li, Lina Chu, Wei Li   +4 more
wiley   +1 more source

Polarimetric 3-D Reconstruction from Multi-Circular SAR at P-Band

, 2014
Multi-circular SAR (MCSAR) is an extension of circular SAR (CSAR) characterized by the formation of a synthetic aperture in elevation with several circular flights.
Prats-Iraola, Pau, Ponce, Octavio, Aguilera, Esteban, Moreira, Alberto, Reigber, Andreas, Scheiber, Rolf   +5 more
core   +1 more source

Elevation Information Extraction Scheme Based on Sub‐Aperture Correlation Using Airborne Circular Synthetic Aperture Radar Imaging

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
The traditional elevation information extraction methods have issues such as limited precision of the elevation extraction and complex processing flow. Thus, an elevation information extraction scheme based on the sub‐aperture correlation using airborne CSAR imaging is proposed.
Hongtu Xie, Qi Peng, Yangyang Xiao, Nannan Zhu   +3 more
wiley   +1 more source

Polar format algorithm of synthetic aperture radar imaging on spiral trajectory

The Journal of Engineering, Volume 2019, Issue 19, Page 5580-5583, October 2019., 2019
A novel polar format algorithm is proposed for spiral trajectory. The synthetic aperture radar (SAR) signal model of spiral trajectory platform is firstly established, then the sector‐by‐sector phase compensation method of spiral trajectory SAR is proposed.
Feng Li, Wengu Yang, Zhou Wang, Di Yao
wiley   +1 more source

High‐Precision Airborne Circular SAR Imaging Method Based on Sub‐Aperture Autofocusing Combined With Terrain Undulation Error Compensation

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
Airborne circular synthetic aperture radar (CSAR) has the ability of multiangle observation and high‐resolution imaging in remote sensing applications, but its imaging performance is often degraded by the platform motion error and terrain undulation error.
Hongtu Xie, Qi Peng, Yangyang Xiao, Nannan Zhu   +3 more
wiley   +1 more source

CNN-Based Vehicle Target Recognition with Residual Compensation for Circular SAR Imaging

, 2020
The contour thinning algorithm is an imaging algorithm for circular synthetic aperture radar (SAR) that can obtain clear target contours and has been successfully used for circular SAR (CSAR) target recognition.
Juan Ma, Rongchun Hu, Wei Li, Zhenming Peng   +3 more
core   +1 more source

Magnitude of Respiratory Problems of Adults in a Community of Bangladesh: A Cross‐Sectional Study

Advances in Public Health, Volume 2026, Issue 1, 2026.
Background and Aims Respiratory diseases contribute significantly to morbidity and mortality rates in Bangladesh, especially in urban areas. This study aimed to estimate the prevalence of respiratory symptoms and identify the key risk factors associated with respiratory problems among adults in a community in Kaliakair, Gazipur, Bangladesh.
Mohammed Atiqur Rahman, Shamim Ahmed, Shuvo Majumder, Manal Mizanur Rahman, Susanta Kumar Paul, Kazi Rahila Ferdousi, Shah Ashiqur Rahman Ashiq Choudhury, Md. Hamza, Md. Abu Rayhan, Samia Rahman, Samprity Islam, Rajashish Chakrabortty, Hannah Wesley   +12 more
wiley   +1 more source

Increase in CH4 Emissions in a Pantanal Wetland Lagoon Due to Extreme Drought and Sediment Exposure

International Review of Hydrobiology, Volume 110, Issue 2, Page 90-99, December 2025.
ABSTRACT The Pantanal, one of the largest wetlands on Earth, stores substantial carbon in its diverse ecosystems but faces increasing threats, such as fires, poor soil management, deforestation, and climate change impacts that may elevate CH₄ emissions.
João Paulo Mariano Godinho, Ricardo Hideo Taniwaki, André Renan Costa‐Silva, Célia Regina Montes, Adolpho José Melfi, Janaina Braga do Carmo   +5 more
wiley   +1 more source