Results 21 to 30 of about 3,386 (52)

On the Directivity of Radiating Quantum Electromagnetic Systems

Electromagnetic Science
We explore the spatial directivity of radiating quantum source systems, which are defined as any generic source capable of producing photon emission and directing it to specific regions in space.
Said Mikki
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Structure Characterization and Analgesic Activity of Novel Pyrazolo[3,4-d]pyrimidin-4-one Derivatives

Chinese Journal of Magnetic Resonance, 2023
Three compounds of novel pyrazolo[3,4-d]pyrimidin-4-one derivatives (A~C) were synthesized through a multi-step reaction using ethyl-2-cyano-3-ethoxyacrylate and 3,4-dimethylphenylhydrazine.
ZHAI Chonggang, WANG Pengcheng, SHAN Yubao, LAN Yu, HU Rui, YANG Yunhuang   +5 more
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A New Method and Circuit of Ringing Suppression for Low-field NMR Instruments

Chinese Journal of Magnetic Resonance, 2023
Accelerating the release of the antenna residual energy to weaken the antenna ringing signal is beneficial to shorten the echo time (TE) of low-field nuclear magnetic resonance (NMR) instruments, thus improving the measurement resolution and signal-to ...
SHI Guanghui, XIAO Lizhi, LIAO Guangzhi, LUO Sihui, LUO Sihui, LU Yapu   +5 more
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Through-wall Human Pose Reconstruction and Action Recognition Using Four-dimensional Imaging Radar

Leida xuebao
Through-wall human pose reconstruction and behavior recognition have enormous potential in fields like intelligent security and virtual reality. However, existing methods for through-wall human sensing often fail to adequately model four-Dimensional (4D)
Rui ZHANG, Hanqin GONG, Ruiyuan SONG, Yadong LI, Zhi LU, Dongheng ZHANG, Yang HU, Yan CHEN   +7 more
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An Overview of Human Pose Estimation Based on Wireless Signals

Leida xuebao
Human pose estimation holds tremendous potential in fields such as human-computer interaction, motion capture, and virtual reality, making it a focus in human perception research.
Yan CHEN, Rui ZHANG, Yadong LI, Ruiyuan SONG, Ruixu GENG, Hanqin GONG, Binquan WANG, Dongheng ZHANG, Yang HU   +8 more
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An Identification Method of Polarization Modulation for Ship and Combined Corner Reflector Based on Civil Marine Radar

Leida xuebao
Distinguishing between ships and corner reflectors is challenging in radar observations of the sea. Traditional identification methods, including high resolution range profiles, polarization decomposition, and polarization modulation, improve radial ...
Di ZHU, Fulai WANG, Chen PANG, Yongzhen LI   +3 more
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Inter-residue through-space scalar ¹⁹F–¹⁹F couplings between CH₂F groups in a protein [PDF]

Magnetic Resonance
Using cell-free protein synthesis, the protein G B1 domain (GB1) was prepared with uniform high-level substitution of leucine by (2S,4S)-5-fluoroleucine (FLeu1), (2S,4R)-5-fluoroleucine (FLeu2), or 5,5′-difluoroleucine (diFLeu).
Y. J. Tan, E. H. Abdelkader, I. D. Herath, A. Maleckis, G. Otting   +4 more
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Development of Low-noise Preamplifier for Low-field NMR

Chinese Journal of Magnetic Resonance
Nuclear magnetic resonance (NMR) technology enables the acquisition of multi-scale molecular dynamics by characterizing the variation of relaxation times under different magnetic field conditions, thereby offering a critical detection methodology for ...
LI Keyan, CHENG Xin, CHEN Junfei, CAO Li, HUANG Zhen, LIU Chaoyang   +5 more
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Collaborative Nonlinear Space-time Adaptive Processing and Pulse Compression Based on Neural Networks

Leida xuebao
Traditional airborne radar Pulse Compression (PC) and Space-Time Adaptive Processing (STAP) suffer performance degradation in complex target and clutter environments due to their reliance on predefined linear models. To address this issue, we developed a
Zhipeng LIAO, Keqing DUAN, Fei GAO
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Adaptive Detection of Range-distributed Targets in Weighted Generalized Inverse Gaussian Clutter

Leida xuebao
In this paper, we investigate the adaptive detection of range-distributed targets in compound-Gaussian clutter, where the texture component follows a Weighted Generalized Inverse Gaussian (WGIG) distribution.
Zhenyu XU, Weijian LIU, Xiaolong CHEN, Hui CHEN, Qinglei DU, Binbin LI, Bilei ZHOU   +6 more
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