Results 31 to 40 of about 14,460 (241)

Micro-Motion Parameter Extraction of Multi-Scattering-Point Target Based on Vortex Electromagnetic Wave Radar

Remote Sensing, 2022
In addition to traditional linear Doppler shift, the angular Doppler shift in vortex electromagnetic wave (VEMW) radar systems carrying orbital angular momentum (OAM) can provide more accurate target identification micro-motion parameters, especially the
Lijun Bu, Yongzhong Zhu, Yijun Chen, Xiaoou Song, Yufei Yang, Yadan Zang   +5 more
doaj   +1 more source

Attitude and Orbital Coupled Modeling and Micro-Doppler Characteristics Analysis of the Projectile with Initial Disturbances

Leida xuebao, 2023
Radar echo modeling based on dynamics and kinematics serves as the theoretical basis for micro-Doppler characteristic analysis and projectile parameter extractions.
Zhihua GONG, Kaiming LI, Pengwei DUAN, Chunjiang CHEN   +3 more
doaj   +1 more source

Feature Extraction Method of Helicopter Target Based on Flicker Phenomenon Combined With Phase Compensation

IEEE Access, 2022
For the typical multi-component periodic micro-Doppler signal parameter estimation, a helicopter rotor feature extraction method based on flicker phenomenon and phase compensation is proposed in this paper.
Saiqiang Xia, Jun Yang, Zhijian Sun, Zibo Zhou, Chaowei Zhang, Jianwei Liu, Yingxin Xu   +6 more
doaj   +1 more source

Two‐Photon Grayscale Lithography (2GL) of High Mechanical and Optical Quality 3D Silica Glass Microstructures

Advanced Functional Materials, EarlyView.
Two‐photon grayscale lithography (2GL) enables high‐speed and precise 3D printing of thermolyzed silica glass microstructures with optical‐grade surface quality, high quality factors, and mechanical strength utilizing a custom‐made pre‐glass resist based on polyhedral oligomeric silsesquioxane (POSS) modified with a high‐sensitivity Norrish type II ...
Jonathan L. G. Schneider, Jiajie Liang, Paul Somers, Martin Wegener, Jens Bauer   +4 more
wiley   +1 more source

Micro-Doppler Effect of Extended Streamlined Targets Based on Sliding Scattering Centre Model [PDF]

Radioengineering, 2016
The scattering center of extended streamlined targets can slide when the direction of radiation is changed. The sliding scattering center has influence on the micro-Doppler effect of micro-motion of the extended streamlined target.
Bo Tang
doaj  

Multiwavelength Implantable Oximeter for Wireless Monitoring of Tissue Oxygenation in the Presence of Blood Volume Changes

Advanced Healthcare Materials, EarlyView.
This study presents an implantable, wireless, battery‐free oximeter that can continuously monitor physiologically consistent regional tissue oxygenation under dynamic changes of blood volume. This is achieved through multiwavelength photoplethysmography and validated both via Monte Carlo simulations and in vivo rat studies. Different stress events were
Anat Usatinsky, Hugo L. Higueros‐Garcia, Sadi Loai, Samantha Unger, Jacob Trueb, Yonatan Usatinsky, Rawad Alkallas‐Valdiviezo, Noor Abu Jarad, Jonathan Wu, Hai‐Ling M. Cheng, John A. Rogers, Abraham Vázquez‐Guardado, Daniel Franklin   +12 more
wiley   +1 more source

Analysis of phase noise influence on micro-Doppler feature extraction of vibrating target

The Journal of Engineering, 2019
It is generally considered that increasing the carrier frequency of radar is an important way to improve the precision of micro-motion measurement. However, the increase of the radar frequency may raise the phase noise intensity of the radar transmitting
Zihao Liu, Bo Peng, Xiang Li
doaj   +1 more source

CNN-32DC: An improved radar-based drone recognition system based on Convolutional Neural Network

ICT Express, 2022
This paper proposes a system that will guard infrastructures against incoming threats from drones by detecting it with the use of a radar device-based detection scheme. The database acquired, named Real Doppler RAD-DAR (Radar with Digital Array Receiver)
Ann Janeth Garcia, Ali Aouto, Jae-Min Lee, Dong-Seong Kim   +3 more
doaj   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

Advanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau, Christian N. Saggau, Stefan Baunack, Thomas Gemming, Yara Abdelaal, Robert Weser, Oliver G. Schmidt, Hagen Schmidt, Andreas Winkler, Mariana Medina‐Sánchez   +9 more
wiley   +1 more source