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Sidelobe reduction based on spectrum reshaping in microwave imaging

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science china(Information sciences) 2011年第1期54卷 204-212页

作者： WANG HuaiJun,su yi,XU HongBo & zhu yutao school of electronic science and engineering,national university of defense technology, changsha 4.0073,china 1. school of electronic science and engineering National University of Defense Technology Changsha 410073 China

Sidelobe artifacts are a common problem in image reconstruction from finite-extent Fourier data obtained by microwave imaging *** order to enhance the image quality,sidelobe reduction must be *** the sidelobe reduction in microwave imaging as the research subject,this paper presents Fourier imaging technique *** the point spread function is obtained through Fourier inversion of rectangular spectral support data and the changing effect of sidelobe direction due to reshaping spectral support is *** reshaping makes that the sidelobes of two Fourier images do not *** on the idea of separating sidelobes from mainlobe,a nolve method that reduces sidelobe levels while maintaining the imaging resolution is *** performance of this method is ***,the simulated and measured data of typical microwave imaging systems such as synthetic aperture radar(SAR),inverse synthetic aperture radar(ISAR)and real aperture radar are used to demonstrate the validity of the proposed method.

关键词： microwave imaging Fourier imaging sidelobe reduction spatial spectrum point spread function

Multi-channel radar array design method and algorithm

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science china(Information sciences) 2010年第7期53卷 1470-1480页

作者： su yi1*, zhu yutao1, YU WenXian2, XU HongBo1 & LEI WenTai1 1school of electronic science and engineering, national university of defense technology, changsha 4.0073, china 2school of Electric, Information and Electrical engineering, Shanghai Jiao Tong university, Shanghai 200240, china 1. school of electronic science and engineering National University of Defense Technology Changsha 410073 China2. School of Electric Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China

The array design of radar antenna is no more a new problem at all. Nevertheless, the array design of multi-channel radar, especially that of MIMO (multiple-input multiple-output) radar, is a new problem. The performance of space diversion and spatial sampling of target scattering are dependent on the array design of MIMO radar, and consequently, which in turn will determine the performances of target parameter estimation, DOA, and imaging. In this paper, commencing with target scattering model, T/R signal model of MIMO radar, and spatial sampling ability for this system are analyzed. Conceptually, under the far field condition, spatial convolution principle determines the array design theory. Based on this idea, array design method and also algorithm are proposed in this paper.

关键词： MIMO-radar antenna arrays DOA estimation spatial sampling imaging algorithm

GTD MODEL-BASED TIME-SHIFT INVARIANT TARGET IDENTIFICATION USING MATCHING PURsuITS AND LIKELIHOOD RATIO TESTS

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Journal of electronics(china) 2008年第2期25卷 186-191页

作者： Wang Dangwei Guan Xinpu Wang Shaogang Ma xingyi su yi school of electronic science and engineering National University of Defense Technology Changsha 410073 China Air Force Radar Academy Wuhan 430010 China

In order to improve the identification capability of ultra wide-band radar,this paper in-troduces a step-variant multiresolution approach for the time-shift parameter estimation. subsequently,combining with the approach,a Geometrical Theory of Diffraction(GTD) model-based time-shift Invariant method to target identification using Matching Pursuits and Likelihood Ratio Test(IMPLRT) is developed. Simulation results using measured scattering signatures of two targets in an ultra wide-band chamber are presented contrasting the performance of the IMPLRT to the Wang's MPLRT technique.

关键词： Target identification Geometrical Theory of Diffraction (GTD) model Scattering mechanism Wide-band radar

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A TAM-BP IMAGING ALGORITHM IN GPR APPLICATION

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A TAM-BP IMAGING ALGORITHM IN GPR APPLICATION

Adaptive Consensus Quantized Control for a Class of High-Order Nonlinear Multi-Agent Systems With Input Hysteresis and Full State Constraints

第四届国际微波与毫米波技术会议

作者： Wentai Lei~(1.2) yi su~1 Chunlin Huang~1 1. school of electronic science and engineering national university of defense technology changsha 4.0073 china 2. Dept. of Aeronautic electronic engineering engineering Institute of Air Force engineering university Xi’an 710038 china

＜正＞In airborne SAR, the principle of BP algorithm is delay and sum. However, in GPR imaging, traditional BP algorithm is restricted by the air-soil interface and the conductivity property of the soil. To obtain precise objects location and reflection intension, BP algorithm must be modified in time-delay and amplitude calculation. In this paper, a TAM-BP algorithm is presented. Measurement data using the HRGPR system are provided to illustrate the performance of the TAM-BP imaging technique.

关键词： subsurface imaging back-projection TAM-BP Imaging algorithm

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IEEE/CAA Journal of Automatica Sinica 2022年第9期9卷 1574-1589页

作者： Guoqiang zhu Haoqi Li Xiuyu Zhang Chenliang Wang Chun-yi su Jiangping Hu the school of Automation engineering Northeast Electric Power UniversityJilin 132012 the Jilin Province International Research Center of Precision Drive and Intelligent Control Jilin 132012China the school of Automation science and Electrical engineering Beihang UniversityBeijing 100191China the Department of Mechanical and Industrial engineering Concordia UniversityQCMontrealH3B 1R6Canada the school of Automation engineering University of Electronic Science and Technology of ChinaChengdu 611731China(

For a class of high-order nonlinear multi-agent systems with input hysteresis,an adaptive consensus output-feedback quantized control scheme with full state constraints is *** major properties of the proposed control scheme are:1)According to the different hysteresis input characteristics of each agent in the multi-agent system,a hysteresis quantization inverse compensator is designed to eliminate the influence of hysteresis characteristics on the system while ensuring that the quantized signal maintains the desired value.2)A barrier Lyapunov function is introduced for the first time in the hysteretic multi-agent *** constructing state constraint control strategy for the hysteretic multi-agent system,it ensures that all the states of the system are always maintained within a predetermined range.3)The designed adaptive consensus output-feedback quantization control scheme allows the hysteretic system to have unknown parameters and unknown disturbance,and ensures that the input signal transmitted between agents is the quantization value,and the introduced quantizer is implemented under the condition that only its sector bound property is *** stability analysis has proved that all signals of the closed-loop are semi-globally uniformly *** Star Sim hardware-in-the-loop simulation certificates the effectiveness of the proposed adaptive quantized control scheme.

关键词： Adaptive quantized control barrier Lyapunov function input hysteresis multi-agent systems

The atlas of ferroicity in two-dimensional MGeX_(3) family:Room-temperature ferromagnetic half metals and unexpected ferroelectricity and ferroelasticity

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Nano Research 2021年第12期14卷 4732-4739页

作者： Kuan-Rong Hao Xing-Yu Ma Hou-yi Lyu Zhen-Gang zhu Qing-Bo Yan Gang su school of Physical sciences University of Chinese Academy of SciencesBeijing100049China school of electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing100049China Center of Materials science and Optoelectronics engineering College of Materials Science and Optoelectronic TechnologyUniversity of Chinese Academy of SciencesBeijing100049China Kavli Institute for Theoretical sciences and CAS Center of Excellence in Topological Quantum ComputationUniversity of Chinese Academy of SciencesBeijing100190China

Two-dimensional(2D)ferromagnetic and ferroelectric materials attract unprecedented attention due to the spontaneous-symmetry-breaking induced novel properties and multifarious potential *** we systematically investigate a large family(148)of 2D MGeX3(M=metal elements,X=O/S/Se/Te)by means of the high-throughput first-principles calculations,and focus on their possible ferroic properties including ferromagnetism,ferroelectricity,and *** discover eight stable 2D ferromagnets including five semiconductors and three half-metals,212D antiferromagnets,and 11 stable 2D ferroelectric semiconductors including two multiferroic ***,MnGeSe3 and MnGeTe3 are predicted to be room-temperature 2D ferromagnetic half metals with Tc of 490 and 308 K,*** is probably for the first time that ferroelectricity is uncovered in 2D MGeX3 family,which derives from the spontaneous symmetry breaking induced by unexpected displacements of Ge-Ge atomic pairs,and we also reveal that the electric polarizations are in proportion to the ratio of electronegativity of X and M atoms,and IVB group metal elements are highly favored for 2D *** tunnel junction and water-splitting photocatalyst based on 2D ferroic MGeX3 are proposed as examples of wide potential *** atlas of ferroicity in 2D MGeX3 materials will spur great interest in experimental studies and would lead to diverse applications.

关键词： two-dimensional materials ferroicity ferroelectricity ferroelasticity ferromagnetic half metal

Analysis and Design of Multi-aspect SAR System for Compressive Sensing-Based 3D Imaging

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Chinese Journal of electronics 2014年第3期23卷 621-627页

作者： ZHOU Hanfei su yi XI Zemin LU Jianbin College of electronic engineering Naval University of Engineering school of electronic science and engineering National University of Defense Technology College of electronic engineering Naval University of Engineering

This paper focuses on the analysis and design of Multi-aspect SAR(MuSAR) system for Compressive sensing-based(CS-based) 3D imaging. For this purpose,the Point ambiguous function(PAF) is proposed to analyze the factors that dominate the Mutual coherence(MC) of MuSAR sensing matrix. The PAF contacts with the parameters and configuration of MuSAR system directly and is easy to manipulate. With PAF, the present study analyzes the factors that dominate the performance of CS-based MuSAR 3D imaging. First of all, the stochastic waveform is an excellent selection. Second, the angular-frequency-diversity can improve the robustness of3 D imaging. Finally, the finer sampling of received data could improve the robustness of MuSAR 3D imaging. Simulation experiments show the validity of conclusion.

关键词： Multi-aspect SAR(MuSAR) Compressive sensing(CS) Point ambiguous function(PAF) Radar imaging

MIMO RADAR IMAGING MODEL AND ALGORITHM

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Journal of electronics(china) 2009年第5期26卷 577-583页

作者： Wang Huaijun Lei Wentai Huang Chunlin su yi school of electronic science and engineering national university of defense technology changsha 4.0073 china school of Info-Physics and Geomatics engineering Central South university changsha 4.0073 china

Based on the array architecture of multiple transmitting/receiving antennas, Multi-Input Multi-Output (MIMO) radar provides a new mechanism for radar imaging technology. In order to explore the processing approach to this imaging mechanism, the two dimensional (2D) imaging model of MIMO radar is established first, and the spatial sampling ability is analyzed from the concept of spatial convolution of the antenna elements. The target spatial spectral filling format of MIMO radar with monochromatic transmitting signal is described. High-resolution imaging capability of MIMO radar is analyzed according to spatial spectral coverage and the corresponding imaging algorithm is presented. Finally, field imaging experiment is used to demonstrate the superior imaging performance of MIMO radar.

关键词： Multi-Input Multi-Output (MIMO) radar Radar imaging Spatial sampling

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AFAP1-AS1: a rising star among oncogenic long non-coding RNAs

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science china(Life sciences) 2021年第10期64卷 1602-1611页

作者： Fang Xiong Kunjie zhu su Deng Hongbin Huang Liting Yang Zhaojian Gong Lei Shi yi He Yanyan Tang Qianjin Liao Jianjun Yu Xiaoling Li Yong Li Guiyuan Li Zhaoyang Zeng Wei Xiong Shanshan Zhang Can Guo science and technology on Information System engineering Laboratory National University of Defense TechnologyChangsha 410000China Department of Periodontology Center of StomatologyXiangya HospitalCentral South UniversityChangsha 410078China NHC Key Laboratory of Carcinogenesis and Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education of china Cancer Research InstituteCentral South UniversityChangsha 410078China Hunan Key Laboratory of Cancer Metabolism Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of MedicineCentral South UniversityChangsha 410013China Department of Oral and Maxillofacial surgery The Second Xiangya HospitalCentral South UniversityChangsha 410011China Department of Medicine Dan L Duncan Comprehensive Cancer CenterBaylor College of MedicineHoustonTexasUSA

Long non-coding RNAs(lncRNAs)have become a hotspot in biomedical *** interest reflects their extensive involvement in the regulation of the expression of other genes,and their influence on the occurrence and development of a variety of human *** filament associated protein 1-Antisense RNA 1(AFAP1-AS1)is a recently discovered oncogenic *** is highly expressed in a variety of solid tumors,and regulates the expression of downstream genes and signaling pathways through adsorption and competing microRNAs,or by the direct binding to other ***,AFAP1-AS1 promotes proliferation,chemotherapy resistance,and resistance to apoptosis,maintains stemness,and enhances invasion and migration of tumor *** paper summarizes the research concerning AFAP1-AS1 in malignant tumors,including the clinical application prospects of AFAP1-AS1 as a potential molecular marker and therapeutic target of malignant *** also discuss the limitations in the knowledge of AFAP1-AS1 and directions of further ***1-AS1 is expected to provide an example for studies of other lncRNA molecules.

关键词： AFAP1-AS1 metastasis proliferation anti-cancer drug PD-1 immunotherapy

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