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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 | 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 |
| 3 | 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 |
| 4 | 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 |
| 5 | 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 |
| 6 | 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 |
| 7 | 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 |
| 8 | effect of POSS on the thermal properties of epoxy显示文摘 | Zengping Zhang Guozheng Liang Xiaolei WangThe | 2007 | Polymer Bulletin2007，，58： | 1 |
| 9 | 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 |
| 10 | Thermo-oxygen degradation mechanisms of POSS/epoxy nanocomposites显示文摘 | Zhang Zengping Liang Guozheng Ren Penggang | 2007 | Polymer Degradation and Stability2007，92，11： | 1 |
| 11 | Fabrication of carbonized spent coffee grounds/graphene nanoplates/cyanate ester composites for superior and highly absorbed electromagnetic interference shielding performance显示文摘The conductive polymer composites(CPCs) with highly efficient electromagnetic interference(EMI)shielding effectiveness(SE) are always accompanied with excessive reflectivity, which would cause serious secondary EMI pollution. In this regard, the significant reduction of EMI reflection of CPCs to alleviate secondary pollution is deemed to be very important. Herein, a promising cyanate ester(CE) based composite was successfully fabricated by compounding carbonized spent coffee grounds(C-SCG) and graphene nanosheets(GNSs) via a facile solution blending followed by a hot-pressing method. Benefiting from the porous structure of C-SCG and the layered structure of GNSs, a three-dimensional(3 D)multi-interface conductive network in the CE was easily constructed. The EMI SE of the resultant 9 wt%C-SCG/CE composite(C9) is 15.38 d B and dramatically enhanced to 31.09 d B with the presence of 3 wt% GNSs. The remarkable enhancement is mainly attributed to the formation of the efficient conductive pathways as well as the well-dispersion of the incorporated fillers. Meanwhile, the absorption-dominated shielding mechanism in the prepared composites gets benefit from the synergistic effect of porous C-SCG and lamellar GNSs, which effectively captures and attenuates electromagnetic waves. These encouraging findings extend the practical applications of porous biocarbon materials in EMI shielding field. | Zhengzheng Guo Penggang Ren Zengping Zhang Zhong Dai Zhenxia Lu Yanling Jin Fang Ren | 2022 | Journal of Materials Science & Technology2022，，7： | 1 |
| 12 | 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 | J Appl Polym Sci2006，101，3： | 1 |
| 13 | GM (1,1) grey prediction of Lorenz chaotic system显示文摘 | Zhang Yagang Xu Yan Wang Zengping | 2009 | Chaos Solitons & Fractals2009，42，2： | 1 |
| 14 | Epoxy-Modified Cyanate Ester Resin and Its High-Modulus Carbon - Fiber Composites 显示文摘 | Penggang Ren Guozheng Liang Zengping Zhang | 2006 | Polymer Composites2006，27，4： | 1 |
| 15 | ZnO whisker reinforced M40/BADCy composite显示文摘 | Ren Penggang Liang Guozheng Zhang Zengping | 2006 | Composites:Part A2006，37，1： | 1 |
| 16 | Research on Optimization of Recloser Placement of DG-enhanced Distribution Networks显示文摘 | ZHANG Li XU Yuqin WANG Zengping | | 0，，0885： | 1 |
| 17 | Performance of Aluminum Borate Whisker Reinforced Cyanate Ester Resin显示文摘 | Yusheng Tang Guozheng Liang Zengping Zhang | 2007 | Journal of Applied Polymer Science2007，106，6： | 1 |
| 18 | The effect of clinical-grade retinal pigment epithelium derived from human embryonic stem cells using different transplantation strategies显示文摘Dear Editor, Many forms of sight-threatening diseases, including retinitis pigmentosa (RP) and age-related macular degeneration (AMD), are caused by the dysfunction, degeneration and loss of the retinal pigment epithelium (RPE)(Strauss, 2005). RPE cell transplantation may potentially recover or halt disease progression, in which human embryonic stem cells (hESCs) could serve as an unlimited donor source for RPE differentiation, and a few clinical trials have shown the safety and effective of transplantation of hESCs-derived RPE (hESC-RPE) for AMD patients (Schwartz et al., 2012;Schwartz etal., 2015;Song etal., 2015;da Cruz et al., 2018;Kashani et al., 2018;Liu et al., 2018). | Lei Wang Wei Wu Qi Gu Zengping Liu Qiyou Li Zhongwen Li Jinhui Fang Wenjing Liu Jun Wu Ying Zhang Liu Wang Haiwei Xu Wei Li Baoyang Hu Qi Zhou Zhengqin Yin Jie Hao | 2019 | Protein & Cell2019，10，6： | 1 |
| 19 | Confirmation of amphetamine, methamphetamine, MDA, MDMA in urine samples using disk solid- phase extraction and gas chromatography-mass spectrometry after immunoassay screening显示文摘 | Huang Zengping Zhang Shaoyu | 2003 | J Chromatogr B2003，792，： | 1 |
| 20 | Ep- oxy-modified Cyanate Ester Resin and Its High-modulus Carbon-fiber Composites 显示文摘 | Penggang Ren Guozheng Liang Zengping Zhang | 2006 | Polymer Composites2006，10，： | 1 |
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