Results 21 to 30 of about 1,809,715 (303)

Scanning Inside Volcanoes with Synthetic Aperture Radar Echography Tomographic Doppler Imaging

Remote Sensing, 2022
A problem with synthetic aperture radars (SARs) is that due to the poor penetrating action of electromagnetic waves within solid bodies, the ability to see through distributed targets is precluded.
Filippo Biondi
doaj   +1 more source

Micro-Motion Classification of Flying Bird and Rotor Drones via Data Augmentation and Modified Multi-Scale CNN

Remote Sensing, 2022
Aiming at the difficult problem of the classification between flying bird and rotary-wing drone by radar, a micro-motion feature classification method is proposed in this paper.
Xiaolong Chen, Hai Zhang, Jie Song, Jian Guan, Jiefang Li, Ziwen He   +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

Spectral De-Aliasing Method of Micro-Motion Signals Based on a Complex-Valued U-Net Network

Remote Sensing, 2023
Spectrum aliasing occurs in signal echoes when the sampling frequency does not comply with the Nyquist Sampling Theorem. In this scenario, the extraction of micro-motion parameters becomes challenging.
Ming Long, Jun Yang, Saiqiang Xia, Mingjiu Lv, Bolin Cheng, Wenfeng Chen   +5 more
doaj   +1 more source

Improved kinematic models for two-link helical micro/nano-swimmers [PDF]

, 2013
Accurate prediction of the three-dimensional trajectories of micro/nano-swimmers is a key element as to achieve high precision motion control in therapeutic applications. Rigid-body kinematics of such robotic systems is dominated by viscous forces.
Tabak, Ahmet Fatih, Yeşilyurt, Serhat
core   +1 more source

Developments in target micro-doppler signatures analysis: radar imaging, ultrasound and through-the-wall radar [PDF]

, 2013
Target motions, other than the main bulk translation of the target, induce Doppler modulations around the main Doppler shift that form what is commonly called a target micro-Doppler signature.
Soraghan, J. J., Woodbridge, K., Clemente, C., Soraghan, J.J., Balleri, Alessio, Balleri, A.   +5 more
core   +1 more source

The Method of Trajectory and Attitude Data Generation for Space Target

Xibei Gongye Daxue Xuebao, 2019
To solve the problem of space targets' trajectory and attitude data generation in system simulation, the characteristics of various types of ballistic missiles and their midcourse targets are analyzed deeply.

doaj   +1 more source

Advancements in Research on Micro-motion Feature Extraction in the Terahertz Region

Leida xuebao, 2018
With years of development and accumulation, a considerable amount of research has focused on micro-motion, an important auxiliary feature in radar target detection and recognition. With the recent rise of terahertz, micro-motion feature extraction in the
Yang Qi, Deng Bin, Wang Hongqiang, Qin Yuliang   +3 more
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Envelope Correction of Micro-Motion Targets Based on Multi-Layer Perceptron During THz-ISAR Sensing

IEEE Access, 2019
Translational compensation is one of the key problems in parameter estimation of moving targets and radar imaging, and envelope correction is the basis of translation compensation.
Qi Yang, Yang Zeng, Ye Zhang, Hongqiang Wang, Bin Deng, Yuliang Qin   +5 more
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Modeling, Comparative Investigation and Compensation for Hysteresis Response of Actuator Using Nonlinear Transformation

Actuators
Aiming at problems such as the reduced positioning accuracy and insufficient dynamic response caused by the inherent hysteresis nonlinearity of piezoelectric actuators, this paper proposes a hysteresis modeling and compensation method for piezoelectric ...
Zhisheng Ren, Yuguo Cui, Xingyang Xie, Pan Chen, Yang Yu   +4 more
doaj   +1 more source