Results 71 to 80 of about 1,347 (235)

Detecting Plateau Zokor (Eospalax baileyi) Mounds in UAV Imagery of Alpine Meadows Using Deep Learning Algorithms

Remote Sensing in Ecology and Conservation, EarlyView.
We developed PZM‐YOLO to automatically detect plateau zokor mounds in UAV imagery of alpine meadows. The model achieved reliable detection of small and densely distributed mounds under complex backgrounds, outperforming the baseline YOLOv5s. This framework supports mound counting, mound position, rodent impact assessment, and grassland restoration ...
Yang Yang, Limin Hua, Lianguo Wang, Jiazhen Li, Rui Dong, Siwei Yang   +5 more
wiley   +1 more source

Directive Antenna Clutter Loss in Slant Paths

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT This paper investigates the development of a clutter loss model specifically for slant paths involving directive antennas. Conventionally, clutter loss is characterized by using isotropic antennas to facilitate standard link budget calculations via single antenna gain values.
Fernando Pérez Fontán, Vicente Pastoriza‐Santos, Fernando Machado Domı́nguez, Thomas Prechtl, Pavel Pechac   +4 more
wiley   +1 more source

On the RFI Detection in Differential Interferometric Synthetic Aperture Radar [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Synthetic Aperture Radar (SAR) can image the ground with a wide area and high resolution at all times and in all weather and has become an important means of remote sensing.
Y. Liu, M. Tao, J. Li, T. Li, J. Chen
doaj   +1 more source

Key Technical Fields and Future Outlooks of Space Manipulators: A Survey

SmartBot, EarlyView.
This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen, Zeyuan Huang, Ying Yan, Xiaokang An, Zhikai Zhao, Jirong Lin, Xiangrong Zhao, Xianyuan Gao, Junyi Zong, Xuewen Jia, Zhipeng Yao, Jianliang Liao, Ning Ji   +12 more
wiley   +1 more source

High resolution imaging of moving ground targets via clutter mitigation and ISAR processing

, 2014
Non-cooperative moving targets appear defocussed within SAR images. Moreover, in the case of ground targets, the blurring effect due to the uncompensated target motion decreases detection capabilities.
D.A. Gray, Bacci, A., A. Bacci, Gray, D. A., Berizzi, F., F. Berizzi, M. Martorella, Martorella, M.; id_orcid   +7 more
core   +2 more sources

Dextractor:Deformation Extractor Framework for Monitoring-Based Ground Radar

Remote Sensing
The radio frequency (RF) data generated from a single-chip millimeter-wave (mmWave) ground-based multi-input multi-output (GB-MIMO) radar can provide a highly robust, precise measurement for deformation in harsh environments, overcoming challenges such ...
Islam Helmy, Lachie Campbell, Reza Ahmadi, Mohammad Awrangjeb, Kuldip Paliwal   +4 more
doaj   +1 more source

Real-Time Spectral Moments Estimation and Ground Clutter Suppression for Precipitation Radar with High Resolution

IEICE Transactions on Communications, 2009
The purpose of this study is the real-time estimation of Doppler spectral moments for precipitation in the presence of ground clutter overlap. The proposed method is a frequency domain approach that uses a Gaussian model both to remove clutter spectrum and to estimate weather spectrum. The main advantage of this method is that it does not use processes
Eiichi Yoshikawa, Tomoaki Mega, Takeshi Morimoto, Tomoo Ushio, Zen Kawasaki   +4 more
openaire   +1 more source

Hot Injection Synthesis of Ultrathin Bi2Se3 Nanosheets With Controllable Dimensions

Small Methods, EarlyView.
Graphic of hot‐injection method for synthesizing Bi2Se3${\rm Bi}_2{\rm Se}_3$ nanoplatelets of controlled shape, thickness, and lateral size. The ultra‐thin regime is achievable, which is interesting for studying topological phase transitions. ABSTRACT In this work, a synthesis method for colloidal nanoplatelets (NPLs) of the topological insulator ...
Jara F. Vliem, Hester Noordmans, Daniel Vanmaekelbergh   +2 more
wiley   +1 more source

Ground moving target indication of polarimetric interferometric synthetic aperture radar using joint scattering vector

IET Radar, Sonar & Navigation
Ground moving target indication (GMTI) plays a critical role in both civilian applications and military applications. The accuracy of complex images coregistration is a major factor for multichannel synthetic aperture radar (SAR) GMTI.
Jing Xu, Long Cheng, Chunhui Yu, Shiwei Zhang   +3 more
doaj   +1 more source

Multi-Channel Synthetic Aperture Radar Imaging of Ground Moving Targets Using Compressive Sensing

IEEE Access, 2018
Integrated with the array technique, multi-channel processing can be applied to synthetic aperture radar of ground moving target imaging (SAR GMTIm), which is very powerful in remote sensing of smart city. To reduce the data sampling amounts, compressive
Gang Xu, Yanyang Liu, Mengdao Xing
doaj   +1 more source