Results 21 to 30 of about 272,725 (249)

Incoherent Integration Detection Method of Airborne Phased Array Radar in a Multipath Environment

International Journal of Antennas and Propagation, 2021
Airborne phased array radar (PAR) suffers from multipath problems when flying over a calm sea surface. The existence of a multipath phenomenon will cause the electromagnetic echo of the same target to be reflected back to the airborne PAR from two paths,
Yili Hu, Yongbo Zhao, Sheng Chen
doaj   +1 more source

Aircraft Target Classification Based on Correlation Features from Time-domain Echoes

Leida xuebao, 2015
This paper reports the classification of helicopters, propeller-driven aircraft, and turbojet based on differences in their time-domain modulation periods using a conventional radar system.
Du Lan, Li Lin-sen, Li Wei-lu, Wang Bao-shuai, Shi Hui-ruo   +4 more
doaj   +1 more source

Dual-polarization radar rainfall estimation in Korea according to raindrop shapes obtained by using a 2-D video disdrometer [PDF]

Atmospheric Measurement Techniques, 2016
Polarimetric measurements are sensitive to the sizes, concentrations, orientations, and shapes of raindrops. Thus, rainfall rates calculated from polarimetric radar are influenced by the raindrop shapes and canting.
H.-L. Kim, M.-K. Suk, H.-S. Park, G.-W. Lee, J.-S. Ko   +4 more
doaj   +1 more source

Convolutional neural networks for radar HRRP target recognition and rejection

EURASIP Journal on Advances in Signal Processing, 2019
Robust and efficient feature extraction is critical for high-resolution range profile (HRRP)-based radar automatic target recognition (RATR). In order to explore the correlation between range cells and extract the structured discriminative features in ...
Jinwei Wan, Bo Chen, Bin Xu, Hongwei Liu, Lin Jin   +4 more
doaj   +1 more source

Active Thermal Field Integration for Marangoni‐Driven Salt Rejection and Water Collection

Advanced Functional Materials, EarlyView.
A thermal gradient fabric (TGF) evaporator with an auxiliary active thermal field can simultaneously increase evaporation rates and achieve long‐term salt rejection. The auxiliary active thermal field is well integrated with solar energy to construct moderate, extensive, and circulating Marangoni flow for salt rejection.
Can Ge, Shuai Guo, Wei Li, Xunlong Zhang, Bin Chen, Xiao Feng, Shichang Yang, Duo Xu, Zhen Yu, Sai Kishore Ravi, Weilin Xu, Jian Fang, Swee Ching Tan   +12 more
wiley   +1 more source

Rapid Diagnostics of Reconfigurable Intelligent Surfaces Using Space‐Time‐Coding Modulation

Advanced Functional Materials, EarlyView.
A fast reconfigurable‐intelligent‐surface (RIS) diagnostics method is proposed based on spatio‐temporal modulation with orthogonal codes. Theoretical analysis demonstrates a clear distinction in code channel power between normal and faulty elements. Simulations validate its feasibility under high fault ratios and varying receiving angles.
Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Marco Rossi, Giuseppe Castaldi, Shuo Liu, Tie Jun Cui, Vincenzo Galdi   +7 more
wiley   +1 more source

Evidence-Theoretic Reentry Target Classification Using Radar: A Fuzzy Logic Approach

IEEE Access, 2021
This study focuses on the reentry target classification and fuses target features based on the generalized evidence theory. The features are extensively investigated, and the ballistic factor and length of the high-resolution range profile are selected ...
Kwangyong Jung, Sawon Min, Jeongwoo Kim, Nammoon Kim, Euntai Kim   +4 more
doaj   +1 more source

A Robust Dual‐mode Self‐Monitoring Battery Thermal Management System via Bilayer Structural Design

Advanced Functional Materials, EarlyView.
An adaptive dual‐mode material capable of both evaporative cooling and photothermal preheating is developed. It achieves a cooling efficiency of 53.9%, surpassing existing evaporative cooling counterparts, and a self‐monitoring capability, making it ideal for electric vehicles, portable electronics, and grid‐scale energy storage.
Shanchi Wang, Zhihao Huang, Zhiguang Xu, Fang Guo, Tao Zhang, Min Hong, Pingan Song, Yan Zhao   +7 more
wiley   +1 more source

Exploiting the Functionality of Cerium Oxide‐Modified Carbon Nanohorns Catalysts Toward Enhanced CO2 Reduction Performance

Advanced Functional Materials, EarlyView.
A cerium oxide‐carbon nanohybrid catalyst is synthesized via two distinct routes and is integrated into H‐type cells and gas diffusion layers (GDLs) to enhance electrochemical performance. Structural variations significantly affect performance, with the solvothermal sample exhibiting higher current densities.
Alessia Pollice, Michele Cacioppo, Miriam Marchi, Miriam Moro, Francesco Paolucci, Marcella Bonchio, Maurizio Prato, Giovanni Valenti, Michele Melchionna, Paolo Fornasiero   +9 more
wiley   +1 more source

Investigation on Multimode SAR Imaging Based on Digital Array Radar

Leida xuebao, 2014
Digital Array Radar (DAR) has the ability of simultaneous multimode imaging and has many potential applications. This paper firstly introduces the basic hardware structure and the operation principle of DAR.
Li Xue-shi, Sun Guang-cai, Shao Peng, Wu Yu-feng, Xing Meng-dao   +4 more
doaj   +1 more source