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| 1 | Joint calibration algorithm for gain-phase and mutual coupling errors in uniform linear array显示文摘The effect of gain-phase perturbations and mutual coupling significantly degrades the performance of digital array radar(DAR). This paper investigates array calibration problems in the scenario where the true locations of auxiliary sources deviate from nominal values but the angle intervals are known. A practical algorithm is proposed to jointly calibrate gain-phase errors and mutual coupling errors. Firstly, a simplified model of the distortion matrix is developed based on its special structure in uniform linear array(ULA). Then the model is employed to derive the precise locations of the auxiliary sources by one-dimension search. Finally, the least-squares estimation of the distortion matrix is obtained. The algorithm has the potential of achieving considerable improvement in calibration accuracy due to the reduction of unknown parameters. In addition,the algorithm is feasible for practical applications, since it requires only one auxiliary source with the help of rotation platforms. Simulation results demonstrate the validity, robustness and high performance of the proposed algorithm. Experiments were carried out using an S-band DAR test-bed.The results of measured data show that the proposed algorithm is practical and effective in application. | Li Weixing Lin Jianzhi Zhang Yue Chen Zengping | 2016 | Chinese Journal of Aeronautics2016，29，4： | 9 |
| 2 | Statistical study of the properties of the magnetic field and plasma in the earth's magnetotail near lunar orbit显示文摘基于数据获得了由的磁场和血浆在月亮的轨道附近的 magnetotail 的在 19921995 的 GEOTAIL 和风 in19942009,磁场和血浆性质用迭加的时代分析统计上被学习。结果近显示出那 0 ?? 邬吗?? | TIAN Tian ZONG QiuGang WANG YongFu FEI ZengPing | 2012 | Science China(Technological Sciences)2012，55，9： | 5 |
| 3 | Parameter estimation of chirp signal under low SNR显示文摘Aiming at solving the problem of great difficulty and low accuracy existing in parameter estimation of chirp signal under low signal-to-noise ratio(SNR) condition, an algorithm of accurate parameter estimation of chirp signal is proposed. First, the algorithm extracts ridge frequency of chirp signal based on Short Time Fourier Transform. Second, the protruding glitch frequencies are eliminated through median filter with proper size and the smoothing frequencies are obtained corresponding to the time. Third, the frequency time frequencymodulated(FM) line is fitted coarsely by the least-square linear fitting method, and some frequency points are removed, which are far away from the FM line. Repeat the process several times until the sample correlation coefficient of the fitted line is in high degree when the optimum chirp line is fitted out, so chirp rate and initial frequency are obtained. Simulation shows that the correct rate of parameter estimation is very high. When SNR is not less than –17 d B, the correct rate is 100%, and when the SNR is –18 d B, the correct rate is still capable of up to 99%. This algorithm has a lower SNR threshold of about –17 d B. When the SNR is greater than threshold,parameter estimation accuracy is close to Cramer Rao low bound(CRLB), higher than parameter estimation based on the phase field method. Measured data experiments show that the algorithm can reasonably fit the chirp line of measured chirp signal, which better characterizes the FM features of chirp signal. | WANG JinZhen SU ShaoYing CHEN ZengPing | 2015 | Science China(Information Sciences)2015，58，2： | 5 |
| 4 | Long term integration of radar signals with unknown Doppler shift for ubiquitous radar显示文摘Ubiquitous radar is a new radar system that provides continuous and uninterrupted multifunction capability within a coverage volume. Continuous coverage from close-in 'pop-up' targets in clutter to long-range targets impacts selection of waveform parameters. The coherent processing interval (CPI) must be long enough to achieve a certain signal-to-noise ratio (SNR) that ensures the efficiency of detection. The condition of detection in the case of low SNR is analyzed, and three different cases that would occur during integration are discussed and a method to determine the CPI is presented. The simulation results show that targets detection with SNR as low as -26 dB in the experimental system can possibly determine the CPI. | Qinglong Bao Zengping Chen Yue Zhang Jian Yang | 2011 | Journal of Systems Engineering and Electronics2011，22，2： | 4 |
| 5 | Coordinated Modulation Strategy Considering Multi-HVDC Emergency for Enhancing Transient Stability of Hybrid AC/DC Power Systems显示文摘This paper presents a multi-HVDC emergency coordinated modulating strategy to enhance the transient stability of hybrid AC/DC power systems.First,the main factors that affect the unbalanced energy distribution during a fault are analyzed,and the dominant generators are determined online.Next,considering the influence on both generators in the sending and receiving ends,the assessment index that evaluates the effects of DC power support is established.On the basis of this,a dynamic DC power support strategy is put forward,and the DC support sequence table is promptly updated by the changing dominant generators.The AC/DC hybrid power system with multi-DC lines is built and used as a test system.The simulation results of different scenarios demonstrate that the proposed method could follow the dominant generator dynamically and adjust the DC participating in modulation to enhance the transient stability effectively and quickly. | Tong Wang Congcong Li Dengkai Mi Zengping Wang Yuwei Xiang | 2020 | CSEE Journal of Power and Energy Systems2020，6，4： | 4 |
| 6 | Design and simulation of digital channelized receivers in fractional Fourier domain显示文摘An approach is proposed to realize a digital channelized receiver in the fractional Fourier domain(FRFD) for signal intercept applications.The presented architecture can be considered as a generalization of that in the traditional Fourier domain.Since the linear frequency modulation(LFM) signal has a good energy concentration in the FRFD,by choosing an appropriate fractional Fourier transform(FRFT) order,the presented architecture can concentrate the broadband LFM signal into only one sub-channel and that will prevent it from crossing several sub-channels.Thus the performance of the signal detection and parameter estimation after the sub-channel output will be improved significantly. The computational complexity is reduced enormously due to the implementation of the polyphase filter bank decomposition,thus the proposed architecture can be realized as efficiently as in the Fourier domain.The related simulation results are presented to verify the validity of the theories and methods involved in this paper. | Pengfei Tang Bin Yuan Qinglong Bao Zengping Chen | 2013 | Journal of Systems Engineering and Electronics2013，24，1： | 3 |
| 7 | POSITIVE SOLUTIONS FOR SINGULAR BOUNDARY VALUE PROBLEM OF SECOND ORDER显示文摘Some results of existence of positive solutions for singular boundary value problems{-u″(t) = p(t)f(u(t)), t ∈ (0, 1),u(0) = u(1) = 0are given, where the function p(t) may be singular at t = 0,1. | LIUJIAQUAN ZENGPING'AN XIONGMING | 2004 | Chinese Annals of Mathematics,Series B2004，25，3： | 2 |
| 8 | Losartan protects neonatal rat cardiac myocytes from advanced glycation end-productsinduced apoptosis显示文摘 | ZENGPing XUDing-Li等 | 2003 | Acta Pharmacologica Sinica2003，24，4： | 2 |
| 9 | Protection dynamic reliability analysis system based on 3RF technique 显示文摘 | DAI Zhihui WANG Zengping | 2011 | IEEE Trans on Power Systems2011，26，3： | 1 |
| 10 | CarbonencapsulationstrategyofNico-catalyst:highlyefficientandstableNi@ C/CdS nanocompositephotocatalystforhydrogenproductionundervisiblelight显示文摘 | PengTY ZhangXH ZengP etal | 2013 | JournalofCatalysis2013，303，： | 1 |
| 11 | Reliability evaluation of the communication network in wide area protection显示文摘 | DAI Zhihui WANG Zengping JIAO Yanjun | | 0，，04： | 1 |
| 12 | Performance of Aluminum Borate Whisker Reinforced Cyanate Ester Resin显示文摘 | Yusheng Tang Guozheng Liang Zengping Zhang Jing Han | 2007 | Journal of Applied Polymer Science2007，106，6： | 1 |
| 13 | ZnO whisker reinforced M40/BADCy composite显示文摘 | PENGGANG REN GUOZHENG HANG ZENGPING ZHANG | 2006 | Com- posites Part A: Applied Science and Manufacturing2006，37，1： | 1 |
| 14 | Effect of the epoxy molecular weight on the properties of a cyanate ester/epoxy resin system显示文摘 | Liang Guozheng Ren Penggang Zhang Zengping | 2006 | Journal of Applied Polymer Science2006，101，3： | 1 |
| 15 | Protection dynamic reliabili- ty analysis system based on 3RF technique显示文摘 | Dai Zhihui Wang Zengping | 2011 | IEEE Trans on Power Systems2011，26，3： | 1 |
| 16 | 显示文摘 | WANGYing ZENGPing WANGYi-feng(王莹 曾平 王义峰) | 2009 | 光学学报2009，29，8： | 1 |
| 17 | Fuzzy linear discriminant analysis for chemical data sets显示文摘 | Chen Zengping Jiang Jianhui Li Yang | 1999 | Chemometrics and Intel- ligent Laboratory Systems1999，45，12： | 1 |
| 18 | Simulation Study of the Workspace of the Parallel Machined Tool显示文摘 | Zhang J M HAO Juan Wang Zengping | 2001 | Journal of Beijing Institute of Technology2001，10，2： | 1 |
| 19 | Synthesis and Characterization of Cage Octa(aminopropylsilsesquioxane) 显示文摘 | Zhang Zengping Liang Guozheng Lu Tingli | 2007 | Journal of Applied Polymer Science2007，103，4： | 1 |
| 20 | effect of POSS on the thermal properties of epoxy显示文摘 | Zengping Zhang Guozheng Liang Xiaolei WangThe | 2007 | Polymer Bulletin2007，，58： | 1 |
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