Results 81 to 90 of about 560 (237)

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

Marine Radar Image Sequence Target Detection Based on Space–Time Adaptive Filtering and Hough Transform

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The performance of marine radar target detection is largely affected by the intricate and dynamic space–time variations of sea clutter signals, which cause substantial numbers of false and missed alarms. To improve the target detection performance
Baotian Wen, Zhizhong Lu, Yongfeng Mao, Bowen Zhou   +3 more
doaj   +1 more source

Spread Sea Clutter Suppression in HF Hybrid Sky-Surface Wave Radars Based on General Parameterized Time-Frequency Analysis

, 2020
In high-frequency (HF) hybrid sky-surface wave radar, the first-order sea clutter broadening is severe under the action of ionospheric phase disturbance and bistatic angles. In this paper, a cascaded method is described to suppress the spread sea clutter.
Zhuo-qun Wang, De-hong Chen, Ya-jun Li, Ai-hua Liu, Xin-fan Xia, Jun-nan Shi, Peng-fei Wang   +6 more
core   +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

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

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

‘The Tragedy of a Small Nation’: Alexander Devine and British Perspectives on the Montenegrin Question, 1918–24

History, EarlyView.
Abstract This article examines the pro‐Montenegrin political campaigns of Alexander Devine, a schoolmaster and journalist who became Montenegro's leading British advocate following its incorporation into the Kingdom of Serbs, Croats and Slovenes after the First World War.
ROSS CAMERON
wiley   +1 more source

Implementation of an Algorithm for the Estimation of the Sea Clutter Distribution and Parameters

Ingeniería, 2017
Sea clutter is the main interfering signal in radar systems. In order to develop appropriate strategies for clutter suppression, an algorithm able to identify the distribution of radar readings becomes necessary. By using several popular methods found in
Ismary Gato Martínez, José Raúl Machado Fernández, Mónica Jiménez Álvarez   +2 more
doaj   +1 more source

The social life of money for children

The British Journal of Sociology, EarlyView.
Abstract Inspired by Nigel Dodd's The Social Life of Money, this article proposes an analysis of entangled economic lives, that is, how meaning, structures and politics jointly shape the flow of monies within households. The past decades have marked a shift from “childrearing expenditures” to “parenting investments” that align with new visions of both ...
Nina Bandelj
wiley   +1 more source

Range-ambiguous Clutter Separation and Suppression Method for Airborne Bistatic Radar Based on Beam Pattern Reconstruction

Leida xuebao
Space-Time Adaptive Processing (STAP) is a key technique used for ground/sea clutter suppression and moving target detection in airborne radar. However, under range ambiguity conditions, the inherent clutter nonstationarity in airborne bistatic radar ...
Hangui ZHU, Wei CHEN, Jianxin YI, Weijian LIU, Wenchong XIE, Yongliang WANG   +5 more
doaj   +1 more source